Anatomy Ch 3 Test Flashcards

1
Q

the basic unit of structure and function in organisms

A

cell

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2
Q

in 1665, who discovered cells

A

Robert hooke

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3
Q

who invented the complex microscope

A

Antony van leeuwenhoek

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4
Q

cell theory:

A

1) all organisms are made up of one or more cells
2) cells are the basic unit of structure and function of all organisms
3) all cells come from other cells that already exist

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5
Q

what type of cell will be directly affected by a cell or virus getting in?

A

prokaryotic

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6
Q

cells without a nucleus or membrane bound organelles

A

prokaryotic

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7
Q

cells with a nucleus and membrane bound organelles

A

eukaryotic

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8
Q

cells come in all different _______ and _______

A

sizes and shapes

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9
Q

different tissues contain cells with different sizes and shapes for ___________ purposes

A

functional

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10
Q

a molecule that specifically binds to a receptor protein on a cell’s plasma membrane

A

ligand

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11
Q

examples of ligands

A

hormones, neurotransmitters, nutrients, enzymes, ions, antibodies

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12
Q

all of the examples of ligands are…

A

chemicals

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13
Q

main structures of a cell:

A

1) plasma membrane - also called cell membrane
2) nucleus
3) cytoplasm/organelles

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14
Q

is the cytoplasm a structure?

A

no

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15
Q

plasma membrane functions

A

protection - serves as a barrier from outside of the cell
semi permeable - allows only certain molecules to enter or exit
communication - allows cells to talk to their surroundings

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16
Q

plasma membrane composition:

A

lipid (phospholipids)
proteins
carbohydrates
some cholesterol

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17
Q

phospholipid molecules: (in the plasma membrane) have a double layer that acts as the __________ for the cell

A

barrier

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18
Q

what all do phospholipid molecules allow through

A

allows oxygen, carbon dioxide, steroids to enter and exit but few other molecules can get through this layer

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19
Q

Cell surface proteins (3):

A

a. Marker protein - identifies the cell
b. Channel protein - allows specific molecules to enter & exit
c. Receptor protein - allows cells to communicate

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20
Q

__________ is a name given to cell surface proteins that extend through the lipid bilayer and may protrude from one or both sides of the cell membrane

A

integral protein

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21
Q

the area inside the cell surround the nucleus

A

cytoplasm

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22
Q

the __________ are found in the cytoplasm of the cell

A

organelles

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23
Q

there is a fluid in the cytoplasm called ___________

A

cytosol

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24
Q

contains the DNA and an organelle called the nucleolus

A

nucleus

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25
Q

The nucleolus produces…

A

ribosomes

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26
Q

The nucleus us enclosed by the __________

A

nuclear membrane

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27
Q

The nuclear membrane acts just like the ________ of the cell, and has the same composition as the _________

A

plasma membrane, plasma membrane

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28
Q

True or False: Every structure in your body is made of proteins

A

True

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29
Q

two main/primary compositions of plasma membrane

A

lipids and proteins

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30
Q

big, spherical structure found inside the nucleus; contains DNA

A

nucelolus

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31
Q

cells have many __________ __________ that work together to perform the necessary functions for life

A

compartmentalized organelles

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32
Q

the first signs of amytrophic lateral shclerosis, also known as _____________ diseases, are subtle - a foot drages, clothing feels heavy on the body, or an exercise usually done with ease becomes difficult. Usually within _____ years of noticing these first signs, failure of the _________ that stimulate muscles becomes so widespread that breathing unaided becomes impossible.

A

Lou Gehrig’s; five; motor neurons;

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33
Q

ALS currently has no treatment. part of the reason is that neurons do not _______, so they are difficult to grow in the lab in order to test a new drug.

A

divide

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34
Q

To treat ALS, potentially, a technology called __________ can take a specialized cell type back to a stage in which it can specialize in any of several ways.

A

cellular reprogramming

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35
Q

_______ is a group of closely related diseases that can affect many different organs

A

cancer

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36
Q

the lifetime risk of developing cancer is _____ for males and _____ for females

A

1 in 2; 1 in 3

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37
Q

Cancer results from ________ that alter the cell cycle in __________

A

mutations; somatic cells

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38
Q

5 characteristics cancer shares

A

hyperplasia; dedifferentiation; invasiveness; angiogenesis; metastasis

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39
Q

hyperplasia is __________-

A

uncontrolled cell division

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40
Q

dedifferentiation is ____________

A

loss of the specialized structures and functions of the normal type of cell from which the cancer cells descend

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41
Q

invasiveness is ________

A

the ability of cancer cells to break through boundaries

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42
Q

angiogenesis is ___________

A

the ability of cancer cells to induce extension of nearby blood vessels

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43
Q

metastasis is _________

A

the spread of cancer cells to other tissues through the bloodstream or lymphatic system

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44
Q

_________ are small structures in a cell that perform specific functions to keep the cell in homeostasis

A

organelles

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45
Q

list the functions, shape, general location in cell, and any special notes about: nucleus

A

functions: contains DNA; Controls cell growth and reproduction; regulates gene expression
shape: generally spherical or oval
general location: central part of the cell (typically in eukaryotic)
special notes: surrounded by a double membrane; contains nucleoplasm and nucleolus where ribosome synthesis occurs

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46
Q

list the functions, shape, general location in cell, and any special notes about:

A

Functions:

Synthesizes ribosomal RNA (rRNA)
Assembles ribosomal subunits
Shape:

Generally round or irregular
General Location:

Within the nucleus
Special Notes:

Not membrane-bound
Visible during interphase as a dense region in the nucleus

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47
Q

brief brief brief list the functions, shape, general location in cell, and any special notes about: nuclear membrane

A

Functions:

Encloses the nucleus
Regulates the transport of molecules in and out of the nucleus
Shape:

Double-layered membrane
General Location:

Surrounds the nucleus
Special Notes:

Composed of inner and outer lipid bilayers
Contains nuclear pores for selective transport

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48
Q

brief brief brief list the functions, shape, general location in cell, and any special notes about: ribosomes

A

Ribosomes
Functions:

Synthesizes proteins by translating mRNA
Shape:

Small, round structures (subunits)
General Location:

Free in the cytoplasm or attached to the endoplasmic reticulum (rough ER)
Special Notes:

Composed of rRNA and proteins
Present in both prokaryotic and eukaryotic cells

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49
Q

brief brief brief list the functions, shape, general location in cell, and any special notes about: mitochondria

A

Functions:

Produces ATP through cellular respiration
Regulates metabolic processes
Shape:

Rod-shaped or oval
General Location:

Scattered throughout the cytoplasm
Special Notes:

Has a double membrane (inner and outer)
Contains its own DNA and ribosomes, enabling some independent replication

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50
Q

brief brief brief list the functions, shape, general location in cell, and any special notes about: lysosomes

A

Functions:

Digests and breaks down waste materials and cellular debris
Contains digestive enzymes
Shape:

Spherical or oval
General Location:

Scattered throughout the cytoplasm
Special Notes:

Often referred to as the cell’s “clean-up crew”
Plays a role in autophagy (removal of damaged organelles)

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51
Q

brief brief brief list the functions, shape, general location in cell, and any special notes about: vacuoles

A

Functions:

Storage of substances (water, nutrients, waste)
Helps maintain turgor pressure in plant cells
Shape:

Generally large and membrane-bound; can vary in shape
General Location:

Predominantly in the cytoplasm; larger in plant cells
Special Notes:

Plant cells often have a central vacuole, while animal cells may have smaller vacuoles
Involved in cellular metabolism and maintaining pH balance

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52
Q

brief brief brief list the functions, shape, general location in cell, and any special notes about: endoplasmic reticulum

A

Functions:

Synthesizes proteins (rough ER) and lipids (smooth ER)
Detoxifies harmful substances
Shape:

Network of membrane-bound tubules and sacs
General Location:

Adjacent to the nucleus and throughout the cytoplasm
Special Notes:

Rough ER has ribosomes on its surface; smooth ER does not
Plays a role in intracellular transport and processing of biomolecules

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53
Q

brief brief brief list the functions, shape, general location in cell, and any special notes about: microtubules and microfilaments

A

Microtubules
Functions:

Provides structural support
Aids in cell division and intracellular transport
Shape:

Hollow, tube-like structures
General Location:

Throughout the cytoplasm, forming part of the cytoskeleton
Special Notes:

Composed of tubulin protein subunits
Involved in forming the mitotic spindle during cell division
Microfilaments
Functions:

Supports cell shape
Facilitates cell movement and muscle contraction
Shape:

Thin, thread-like structures
General Location:

Throughout the cytoplasm, also part of the cytoskeleton
Special Notes:

Composed of actin protein subunits
Plays a role in cytokinesis and cell motility

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54
Q

brief brief brief list the functions, shape, general location in cell, and any special notes about: cilia

A

Functions:

Move fluids and particles across the cell surface
Assist in locomotion for certain cells
Shape:

Short, hair-like projections
General Location:

Found on the surface of some eukaryotic cells
Special Notes:

Composed of microtubules arranged in a “9+2” structure
Involved in sensory functions and can be found in respiratory tract and reproductive organs

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55
Q

brief brief brief list the functions, shape, general location in cell, and any special notes about: flagella

A

Functions:

Propel cells through liquid environments
Aid in cell motility
Shape:

Long, whip-like projections
General Location:

Found on the surface of certain cells, such as sperm
Special Notes:

Composed of microtubules arranged in a “9+2” structure
Typically fewer in number than cilia and longer in length

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56
Q

brief brief brief list the functions, shape, general location in cell, and any special notes about: vesicles

A

Functions:

Transport materials within the cell
Store substances and facilitate metabolism
Shape:

Small, membrane-bound sacs
General Location:

Scattered throughout the cytoplasm
Special Notes:

Can originate from the endoplasmic reticulum or Golgi apparatus
Involved in processes like exocytosis and endocytosis

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57
Q

brief brief brief list the functions, shape, general location in cell, and any special notes about: centrosome

A

Functions:

Organizes microtubules
Plays a key role in cell division (spindle formation)
Shape:

Typically cylindrical structure
General Location:

Near the nucleus in the cytoplasm
Special Notes:

Composed of a pair of centrioles surrounded by pericentriolar material
Important for maintaining cell structure and facilitating mitosis

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58
Q

brief brief brief list the functions, shape, general location in cell, and any special notes about: chromatin

A

Functions:

Packages DNA to fit in the nucleus
Regulates gene expression and DNA replication
Shape:

Fibrous and thread-like structure
General Location:

Found within the nucleus
Special Notes:

Composed of DNA and proteins (histones)
Exists in two forms: euchromatin (active) and heterochromatin (inactive)

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59
Q

brief brief brief list the functions, shape, general location in cell, and any special notes about: golgi apparatus

A

Functions:

Modifies, sorts, and packages proteins and lipids for secretion or delivery to other organelles
Shape:

Stack of flattened membrane-bound sacs (cisternae)
General Location:

Located near the endoplasmic reticulum (ER) in the cytoplasm
Special Notes:

Often referred to as the cell’s “post office”
Involved in the formation of lysosomes and vesicles for transport

60
Q

brief brief brief list the functions, shape, general location in cell, and any special notes about: peroxisomes

A

Functions:

Break down fatty acids and amino acids
Detoxify harmful substances (e.g., hydrogen peroxide)
Shape:

Small, spherical membrane-bound organelles
General Location:

Scattered throughout the cytoplasm
Special Notes:

Contain enzymes like catalase to convert hydrogen peroxide into water and oxygen
Involved in lipid metabolism and the production of plasmalogens (important for cell membranes)

61
Q

which organelle is mostly used for plants

A

vacuoles/vesicles

62
Q

how do molecules enter and exit through the plasma membrane

A

passive and active transport

63
Q

no energy used by the cell; not its own energy; you can’t stop it

A

passive transport

64
Q

examples of passive transport

A

diffusion; osmosis; facilitated diffusion; filtration

65
Q

cell’s energy must be used (40%)

A

active transport

66
Q

examples of active transport

A

endocytosis and exocytosis

67
Q

when molecules move from an area of high concentration to one of a low concentration through a cell’s membrane

A

diffusion

68
Q

this is how molecules like oxygen, carbon dioxide, and steroids enter and exit the cell

A

diffusion

69
Q

when molecules of water move from an area of high concentration to one of a low concentration through a cell’s memraben

A

osmosis

70
Q

this is actually just like diffusion as far as water moving from high to lower concentration, but water moves through pores in the membrane not directly through phospholipid bilayer

A

osmosis

71
Q

when molecules are too large to enter or exit by normal means and instead have to enter or exit through special carrier proteins

A

facilitated diffusion

72
Q

in facilitated diffusion, is the movement from high to low concentration, or low to high concentration?

A

high to low concentration

73
Q

How do glucose and some ions have to enter the cell?

A

facilitated diffusion

74
Q

molecules are forced from regions of higher pressure to regions of lower pressure

A

filtration

75
Q

does filtration have ot be from high conc to low conc?

A

no

76
Q

filtration is how water leaves _______

A

capillaries

77
Q

what is the only example talked about with the human body and filtration?

A

water leaving capillaries

78
Q

the movement of molecules in through the plasma membrane, usually too large to enter any other way

A

endocytosis

79
Q

how many ways of endocytosis are there

A

3

80
Q

pinocytosis is

A

fluid coming in

81
Q

phagocytosis

A

actual molecule (protein/amino acid/etc.)

82
Q

receptor-mediated endocytosis

A

a receptor pulls a molecule in

83
Q

the movement of molecules out of the plasma membrane, that are usually too large to exit by itself

A

exocytosis

84
Q

in endocytosis, the cell never opens up, but rather __________

A

grows around the protein

85
Q

what is the source of energy for active transport systems?

A

ATP

86
Q

the active transport systems have __________ energy

A

cellular

87
Q

passive transport systems source of energy is

A

molecular motion

88
Q

the life span/cycle of a cell (the stages of a cell’s life)

A

cell cycle

89
Q

growth stage of a cell/Gap stage 1

A

G1

90
Q

DNA is replicated in the nucleus - cell is still growing

A

synthesis

91
Q

organelles replicated inside the cell and the cell is still growing/Gap stage 2

A

G2

92
Q

new nuclei made with DNA inside

A

M (Mitosis/Meiosis)

93
Q

cytoplasm splits creating new cells

A

cyotkinesis

94
Q

sex cells are called

A

gametes

95
Q

skin cells are

A

somatic cells

96
Q

the first 3 stages of the cell cycle

A

interphase

97
Q

How does the cell know if it is going through mitosis or meiosis?

A

It depends on the type of cell that is being created. There are somatic cells and gametes (Germ cells). Somatic cells go through mitosis, and gametes go through meiosis.

98
Q

Do all cells complete the Cell Cycle?

A

NO!! Certain cells are produced, function, and die without reproducing. These include: erythrocyte, skeletal muscle cells, neurons

99
Q

haploid is ____ set(s) of chromosomes. Diploid is ___ set(s)

A

1, 2

100
Q

a process in which chromosomes within a somatic cells are separated creating 2 new identical diploid nuclei

A

mitosis

101
Q

there are ____ individual steps of Mitoses (_______)

A

4, P.M.A.T.

102
Q

body cells

A

somatic cells

103
Q

how many chromosomes do somatic/body cells have in their nuclei

A

46

104
Q

refers to nuclei/cells with 2 copies of each chromosomes (46)

A

Diploid (2n)

105
Q

what does “n” refer to

A

number of human chromosomes

106
Q

a process in which the cytoplasm of a cell divides creating 2 new cells

A

cytokinesis

107
Q

DNA that has yet to be coiled into chromosome form> DNA is in this form during interphase

A

chromatin

108
Q

protein disc that holds homologous chromosomes together

A

centromere

109
Q

organelles build of microtubules that move chromosomes within a nucleus during mitosis and meiosis

A

centrioles

110
Q

identical pairs of chromosomes present during stages of mitosis and meiosis (X-shape)

A

sister chromatids

111
Q

a complex organelle crucial for microtubule organization and cell cycle progression

A

centrosome

112
Q

Germ cells can also be thought of as _________________

A

reproductive stem cells

113
Q

What phase of Mitosis is this?
1) Chromatin (DNA) forms chromosomes (Sister chromosomes)
2) Nuclear membrane starts to disintegrate
3) Nucleolus disappears
3) Centrioles appear producing spindle fibers

A

Prophase

114
Q

What phase of Mitosis is this?
1) Centrioles move to poles
2) Spindle fibers form centrioles attach to chromosomes (Sister chromosomes)
3) Spindle fibers move chromosomes to equator

A

Metaphase

115
Q

What phase of Mitosis is this?
1) Spindle fibers pull chromosomes apart into individual chromatids
2) Chromatids are pulled by spindle fibers to opposite poles

A

Anaphase

116
Q

What phase of Mitosis is this?
1) Chromatids turn back into chromatin
2) Nuclear membrane reappears (2)
3) Nucleolus reappears (2)
4) 2 new nuclei produced

A

Telophase

117
Q

Why is mitosis important?

A

Before cells can divide the genetic material (DNA) in the nucleus must be separated evenly so that each new cell has its own set of DNA. After mitosis, when cytokinesis is completed, 2 new identical cells with 46 chromosomes each are produced.

118
Q

the division of the chromosomes in the nucleus of a somatic cells, which results in the production of 2 new nuclei

A

mitosis

119
Q

MITOSIS:
A) The 2 new nuclei are _______ (2n)
b) The 2 new nuclei are ________ to one another.
c) Mitosis is the ______ step of the cell cycle
d) Mitosis starts with a nucleus that has ______ chromosomes in it.

A

diploid, identical, 4th, 92

120
Q

cell specialization

A

differentiation

121
Q

_________ cells are not differentiated

A

stem

122
Q

there are 2 types of stem cells:

A

embryonic and adult

123
Q

Programmed cell death

A

apoptosis

124
Q

What is the difference between chromatin and chromosomes? Are they also alike?

A

The difference is the shape. Yes - they are both DNA.

125
Q

What does molecule concentration have to do with diffusion, osmosis, and facilitated diffusion?

A

when molecules move to the membrane, it has to be from high to low concentration

126
Q

What is equilibrium?

A

when the concentration is even on both sides

127
Q

a process that separates the chromosomes in the nucleus of a German cell, resulting in the production of 4 genetically different haploid nuclei

A

meiosis

128
Q

in meiosis, are the 4 cells produced different or the same?

A

different

129
Q

the 4 new nuclei in meiosis are diploid or haploid?

A

haploid; 1n = 23

130
Q

how many chromosomes at the end of meiosis

A

23

131
Q

meiosis as 2 Nuclear divisions (goes through PMAT twice) to get chromosome number down to 23. What is skipped?

A

skips interphase the second time

132
Q

AS a result of meiosis, then cyotkinesis, ________ are produced

A

gametes

133
Q

Three processes that ONLY occur in meiosis: These do not happen in mitosis.

A

Synapsis; Crossing over; Skipping replication

134
Q

Meiosis I; which stage is this:
a) homologous chromosomes line up at the equator. moved there by spindle fibers from centrioles

A

metaphase I

135
Q

the pairing of homologous chromosomes that occurs in prophase of the first meiotic division and during which crossing-over may occur.

A

synapsis

136
Q

Meiosis I: what phase is this
a) nuclear membrane and nucleolus disintegrate
b) centrioles with spindle fibers move to poles
c) chromatin turns into chromosome form (homologous chromosomes - XX)
d) Synapsis occurs (XX) then crossing over happens

A

prophase I

137
Q

Meiosis I; what phase is this
a) nuclear membrane reforms around chromoes
b) nucleolus reforms
c) two new genetically different diploid (2n=4) nuclei are produced

A

telophase i

138
Q

Meiosis I; what phase is this

A

a) homologous chromosomes are separated, (X ——- X)
b) chromosomes are pulled to each pole by spindle fibers

139
Q

After Telophase I, cytokinesis does happen, and 2 new cells are made but they do not go into the beginning of the cell cycle like normal cells would. These cells, which will be gametes, skip INTERPHASE (________) and start ________.

A

G1, S, G2, MEIOSIS-II

140
Q

Meiosis II which phase
a) centromere broken and chromsomes are separated
b) chromatids pulled to poles

A

anaphase ii

141
Q

meiosis II which phase
a) nuclear membrane and nucleolus reappear
b) chromosomes turn into chromatin
c) centrioles and spindles disappear
d) four new haploid nuclei produced

A

telpohase ii

142
Q

meiosis Ii which phase
a) nuclear membrane disappears
b) centrioles and spindles reappear
c) chromatin turns into chromosome form

A

prophase ii

143
Q

meiosis Ii which phase
a) chromosomes line up at equator

A

metaphase ii

144
Q

after telophase ii, does cytokinesis occur

A

yes

145
Q

daughter cell of a stem cells whose own daughter called are restricted to follow specific lineages

A

progenitor cell

146
Q

structures made from DNA sequences and proteins found at the end of a chromosome

A

telomere

147
Q

FINALLY CH 3 IS DONE DONT FORGET ABOUT CH 2 AND MUSCLES DONT GIVE UP YOU GOT THIS*****

A

GO TO BED BEFORE 12:10