Chapter 2

Question 1

What will pass directly through a cell membrane most easily?

Answer 1

Small nonpolar molecules.

Question 2

Which of the following represents the correct order of the phases of the cell cycle?

Answer 2

G1 > S > G2 > M

Question 3

Division of the cytoplasm is called:

Answer 3

Cytokinesis

Question 4

Exocytosis is a process by which cells:

Answer 4

Release substances from the cell via vesicles.

Question 5

A form of endocytosis where the cell takes in liquid is called _______.

Answer 5

Pinocytosis

Question 6

Low density lipoprotein is brought into the cell by ________.

Answer 6

Receptor-mediated endocytosis

Question 7

The mitotic spindle fibers attach to chromosomes via special structures termed:

Answer 7

Kinetochores

Question 8

Allowing oxygen to diffuse through the cell membrane, but rejecting a large protein from passing, is an example of:

Answer 8

Selective permeability

Question 9

Cytosol is in the:

Answer 9

Cytoplasm

Question 10

Primary and secondary active transport proteins differ in that primary active transport proteins:

Answer 10

Move both molecules against their gradients, while secondary active transport proteins couple the movement of an ion down its gradient with the movement of another molecule against its gradient.

Question 11

The NA+/K+ ATPase moves Na in the ________ direction compared with the direction it travels through sodium leakage channels.

Answer 11

Opposite

Question 12

What is the source of energy used to power the sodium-potassium pump?

Answer 12

Breakdown of ATP

Question 13

Facilitated diffusion required a specific transporter for a specific molecule.

Answer 13

True

Question 14

Epidermal cells

Answer 14

Covering

Question 15

Adipose cells

Answer 15

Storage

Question 16

Skeletal muscle cells

Answer 16

Movement

Question 17

Lymphocytes

Answer 17

Defense

Question 18

Types of passive transport:

Answer 18

Simple diffusion
Osmosis
Facilitated Diffusion
Bulk filtration

Question 19

Simple diffusion is defined as the movement of:

Answer 19

Molecules from areas of higher concentration to areas of lower concentration.

Question 20

The plasma membrane is composed of an approximately equal measure of ______ & _______.

Answer 20

Protein

Lipids

Question 21

In a cell that is NOT dividing, the unwound, filamented mass of DNA and associated proteins is called:

Answer 21

Chromatin

Question 22

The lysosomes contains ______ enzymes.

Answer 22

Hydrolytic