Chapter 5

Question 1

What are the two types of “membranes” that exist in the body?

Answer 1

Pericardium , Epithelial

Question 2

What is the scientific name for the cell membrane?

Answer 2

Plasmalemma

Question 3

Membrane proteins may catalyze what two types of enzymatic reactions?

Answer 3

External Reaction, Internal Reaction

Question 4

What is the name of the molecule that binds to cell surface receptors?

Answer 4

Ligands

Question 5

What are two examples of receptor/ligand binding?

Answer 5

hormones, cell recognition molecule

Question 6

How are channel proteins different from carrier proteins?

Answer 6

Channel proteins open crates of water filled passage way

Carrier portions bind to substrate only open to one side of the membrane.

Question 7

Channel proteins are often called what?

Answer 7

Nuclear pores

Question 8

What is the limitation of channel proteins?

Answer 8

allows passage of certain molecules less selective

Question 9

What is the limitation of carrier proteins?

Answer 9

slower transport more specific

Question 10

Carrier proteins may be open to both sides of the membrane at the same time T/F?

Answer 10

F

Question 11

Membrane carbohydrates form what part of the cell?

Answer 11

external glycocaylx

Question 12

Membrane carbohydrates are used for what functions?

Answer 12

cell recognition, cell stability, and immune response

Question 13

Membrane proteins are usually composed of what two molecules?

Answer 13

glycolipids , glycoproteins

Question 14

What is the difference between ICF and ECF?

Answer 14

Exocellular fluid

Intracellular fluid

Question 15

ECF may be divided into two components. Name and describe both.

Answer 15

Interstitial, plasma

Question 16

What type of movement is passive and down a concentration gradient?

Answer 16

diffusion

Question 17

Diffusion always stops at;

Answer 17

equilibrium

Question 18

What factors affect the rate at which diffusion occurs?

Answer 18

Surface area, temperature, distance, lipid solubility, and size.

Question 19

Which of these factors increase diffusion? Decrease it?

Answer 19

1

Question 20

What type of diffusion uses transport proteins and is passive?

Answer 20

facilitated diffusion

Question 21

How is active transport different from diffusion?

Answer 21

active transport uses ATP to move product

Diffusion uses transport protiens

Question 22

What type of cells use active transport of sodium and potassium ions for their basic function?

Answer 22

nerve cell

Question 23

What term is used to describe cell eating, in which large particles or cells are engulfed?

Answer 23

phagocytosis (cell eating)

Question 24

What cell organelle is used to digest particles within phagosomes?

Answer 24

lysosome

Question 25

What is the taking in of small molecules by forming vesicles around them?

Answer 25

endocytosis

Question 26

How is exocytosis different from endocytosis? How is it often used in the cell?

Answer 26

endocytosis take in some molecules by forming vesicle around them. exocytosis releases of cellular products such as hormones