Chapter 3

Question 1

what is a cell?

Answer 1

smallest unit of life

Question 2

fluid mosaic model

Answer 2

flexibility, mosaic- things are stuck to it

Question 3

what is another name for the plasma membrane ?

Answer 3

cell membrane

Question 4

ER

Answer 4

• membrane bound

-

Question 5

RER

Answer 5

• has ribosomes

-

Question 6

SER

Answer 6

• contains enzymes

- have cells that can break down drugs and alcohol such as liver cells

Question 7

Where does protein synthesis occur?

Answer 7

Ribosome

Question 8

Ribosome

Answer 8

• are composed of protein and RNA molecules

Question 9

Golgi apparatus

Answer 9

refines, packages and transport proteins

Question 10

what is the inner layer of the Mitochondria called

Answer 10

cristae

Question 11

Mitochondria

Answer 11

main purpose is to make ATP

Question 12

lysosome

Answer 12

garbage collected…gets collected into a cell and broken down

Question 13

peroxisomes

Answer 13

e breakdown of very long chain fatty acids through beta-oxidation

Question 14

microfilaments and microtubules

Answer 14

thin threadlike strands in the cytoplasm

Question 15

centrosome

Answer 15

nonmembraneous, contains centrioles which are contained of microtubules.

Question 16

cilia and flagella

Answer 16

structures that allow for movement attached as an extension from the surfaces of certain cells

Question 17

vesicle

Answer 17

membranous sacs that store and transport substances within a cell and between cella

Question 18

nuclear envelope

Answer 18

consists of inner and outer lipid bilayer membranes

Question 19

what are the protein- lined channels called on the nuclear envelope?

Answer 19

Nuclear Pores

Question 20

Nucleolus

Answer 20

a small, dense body composed largely of RNA and protein

Question 21

Chromatin

Answer 21

loosley coiled fibers of DNA and protein

Question 22

What does chromatin turn into after being condensed ?

Answer 22

Chromosomes

Question 23

diffusion

Answer 23

movement of particles from an area of high to low concentration.

Question 24

which are movements considered passive?

Answer 24

• facilitated diffusion
• osmosis
• diffusion

Question 25

facilitated diffusion

Answer 25

substances that are not able to pass through the lipid bilayer need help of a membrane protein to get across…

Question 26

osmosis

Answer 26

is the movement of water across a selectively permeable membrane

Question 27

isotonic

Answer 27

when the solute and solvent are at equilibrium

Question 28

hypertonic

Answer 28

• if put into a hypertonic solution the cell will

- more solute then solvent

Question 29

Hypotonic

Answer 29

• solutions with more solvent

- when a cell is placed in a hypotonic solution the cell will swell

Question 30

filtration

Answer 30

forces molecules through membrane

Question 31

active transport

Answer 31

is a process that moves particles through membranes from a region of lower concentration to a high concentration

Question 32

Endocytosis

Answer 32

allow molecules or particles that are to large to enter the cell by diffusion or active transport to enter by means of a vesicle

Question 33

Exocytosis

Answer 33

secretes outside of the cell

Question 34

Pinocytosis

Answer 34

“cell drinking” cells take in droplets of liquid from their surroundings

Question 35

Phagocytosis

Answer 35

“cell eating”…cell takes on solids

Question 36

mitosis

Answer 36

cell division

Question 37

at what stage does DNA replicate

Answer 37

interphase

Question 38

At what stage do the number of chromosomes double ?

Answer 38

Interphase

Question 39

Chromosomes are lined along the equilateral line during …

Answer 39

Metaphase

Question 40

At what stage are the daughter cells completely formed

Answer 40

Telophase

Question 41

The centromeres divide during…

Answer 41

Anaphase