Chp 3 -review sheet flash cards

1
Q

1 What is cytology

A

the study of cells

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2
Q

2 why is Robert Hooke important

A

he coined the word cell

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3
Q
  1. Why are Matthias scheilden, theodor schwann and zacharias jassen important
A
  1. (scheilden) plants are made of cells
  2. (schwann) animal are made of cell
  3. (jassen) invented the compound microscope
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4
Q
  1. why is Leeuenwenhooke important
A

father of microscopy, made lense that improved use
first to find a microscopic organisms

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5
Q
  1. what did rubalf virchow say
A

cells come from preexisting cells

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6
Q
  1. what are the 3 principles of the cell theory
A
  1. all organisms are made of 1 or more cells
  2. cells are the buildings blocks of life
  3. all cells some existing cells
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7
Q
  1. what is the difference btwn unicellular and multicellular
A

unicellular - one cell (bacteria)
multicellar - many cells ( animals, plants humans)

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8
Q
  1. what is colonial orgasms
A

similar cells working together

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9
Q
  1. what is the differnce btwn tissure organ and organ system
A

tissue - similar cells working together
organ - similar tissue working together
organ system - organs working together

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10
Q
  1. difference btwn eukaryotic and prokaryotic
A

eukaryotic - membrane around the nucleus (anything but bacteria)
prokaryotic -no membrane around the nucleus (bacteria)

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11
Q

What are the 2 names of the cell membrane

A
  1. screen door
  2. plasma membrane
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12
Q

were is the cell membrane found

A

on the cell wall

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13
Q

difference btwn hydrophilic and hydrophilic
what parts are they on the cell membrane

A

hydrophilic- (heads) loves water
hydrophilic - ( tails) hates water

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14
Q

What structure on the cell membrane allows things to pass through it?

A

phospholipid bilayer

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15
Q

how does signal transmission across a membrane happen?

A

receptor protein recieves signal molecules (ligands) that cause a response in the cell

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16
Q

Where are cell walls found?
what do they do?
What is it made of?

A

the outermost layer of the plant cell
they protect the cell
they are made of cellulose

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17
Q

Difference btwn the primary and secondary wall

A

primary - made when the cell is developing
secondary - produced when the cell is mature ( more cellulose)

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18
Q

What does cytoplasm do?
How does it look?
How does it differ from cytosol?

A

cytoplasm keeps the cells in place
it looks like jelly, or a liquid
cytosol is the liquid of cytoplasm

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19
Q

what do the mitochondria do?
whats the nickname?
How many membranes does it have

A

it makes ATP / energy
powerhouse of cell
2 membranes

20
Q

what are cristae
what is there purpose

A

the folds in the inner membrane
to increase surface area

21
Q

What are the 3 organelles where DNA can be found
( 1 in plants and 2 in animals cells)

A

Plants: chloroplasts
Animals: mitochondria, Nuclues

22
Q

How many mitochondria can be found in a cell

A

Numerous to few in a cell
(depends on how active you are)

23
Q

What do ribosomes do
what are they made of?

A

ribosomes make protien
there made of protein and RNA

24
Q

Where are ribosomes found

A

there found in the RER and flouting around in the cell

25
Q

what are 2 kinds of endoplasmic reticulum

A

(Rough ) RER - has ribosomes
(Smooth) SER - detoxifies and produces lipids (no ribosomes)

26
Q

what is the purpose of the golgie
how does it work

A

process, sort, and deliver proteins and lipids

it works by sacs being pinched off and put in vesicles and shipped to somewhere else

27
Q

Nickname of lysooms
what do they do

A

Nickname: garbage man
they get rid of waste in the cell, ( by using digestive enzymes)

28
Q

what is the cytoskeleton
what is it made of
what is the purpose of each one

A

the framework of the cell
its made of:
microtubules - give shape, act as a rail track
intermediate filaments - add strength
microfiliments - smallest diameter & help cell division

29
Q

How are cilia and flagella the same?
How are they different

A

They have the same cause they both move the cell

Cilia - This covers the cell, like little whiskers to push around the cell
Flagella - has a long extension to move around

30
Q

what are chloroplasts

A

chloroplast organically used to change light into energy

31
Q

What is the difference btwn thylakoids and grana

A

thylakoids are flattened sacs
grana are stacked thylakoinds

32
Q

what is chlorophyll

A

the pigment of chloraplasts
makes plants green

33
Q

what is stroma

A

fluid that surrounds thylakoids

34
Q

what is the purpose of vacuoles and vesicles

A

vacuoles - holds water, food, waste, or other stuff (closet)
vesicles - more mobile then vacuoles; madeby golger and ER (bookbage)

35
Q

(short answer question) what is turgor pressure
how does it work

A

water pressure in a cell
it pushes the cell membrane against the cell wall

36
Q

what are centrioles used for

A

produce spindle fibers for cell division cylindrical shared

37
Q

what are considered the control center

A

nucleus

38
Q

where does DNA come from

A

nucleus

39
Q

decribe the nuclear envolope

A

double membrane around the nucleus
nuclear pores opening in the envelope

40
Q

what is homeostasis

A

keeping steady condition, constantly collects info

41
Q

what is the nucleolus

A

center of the nucleus
contains RNA and starts making protein

42
Q

diff btwn isotonic, hypertonic, and hypotonic

A

isotonic - concentration of water is same inside and outside of the cell
hypertonic - lower concentration inside the outside
hypotonic - higher concentration inside the outside

43
Q

What is passivetransport ?
what are 2 exaplmes
what are three things effect the speed of transport.

A

transport that doesn’t use energy
diffusion and osmosis
3 things:
size
shape
electrical charges

44
Q

what is active transportation
how do carrier proteins fit into this

A

transport that needs energy (against the gradient)
carrier proteins - allow only certain things tp pass through. Na+k+

45
Q

diff btwn exocytosis and endocytosis

A

exocytosis - exiting the cell
endocytosis - into the cell
( both are active trans port

46
Q

diff btwn phagocytosis and pinocytosis

A

phagocytosis - one cell ingesting another
pinocytosis - moves fluids

47
Q

explain the soduim - potassuim pump (Na+K+) pump

A

(low to high)
for every ATP molecule, the pump uses 3 sodium ions are exported and 2 potassium ions are imported
AGAINST THE GRADIENT