CHAPTER 3

Question 1

Mitosis

Answer 1

phase where cell divides into two daughter cells

Question 2

G1 and G2 phase

Answer 2

phases of cell grown and preparation for mitosis

Question 3

S phase

Answer 3

phase which is where DNA is replicated

Question 4

cells that have the ability to proliferate are often called

Answer 4

stem cells

Question 5

the plasma membrane is composed of

Answer 5

1. phospholipids
2. cholesterol
3. proteins
4. glycoproteins and glycolipids

Question 6

proteins in the membrane can serve as

Answer 6

1. anchors for cell-to-cell junctions and the cytoskeletomn
2. receptors that convey signals from the exterior
3. channels or pumps that can create electrical potential
4. enzymes

Question 7

permeability depends on

Answer 7

size, shape, electrical charge, and lipid solubility

Question 8

4 modes of transport

Answer 8

1. Diffusion
2. Filtration (passive),
3. Carrier-mediated (passive or active)
4. vesicular (active)

Question 9

Energy is supplied in the form of

Answer 9

ATP

Question 10

An example of active transport is

Answer 10

NA/K ATP Pump, that actively pumps NA out of cells and K in.

Question 11

and example of secondary active transport

Answer 11

the sodium-dependent glucose transporter, that allows us to absorb glucose from the gut to the kidney

Question 12

what is pinocycosis

Answer 12

cell drinking

Question 13

cytoskeleton is made up of

Answer 13

1. microfilaments (actin)
2. thick filaments (myosin)
3. intermediate filaments (keratin)
4. microtubles (tubulin)