Question 1

Movement of large molecules into a cell is called

Accepted Answer

A) endocytosis. 
B) exocytosis. 
C) bulk transport. 
D) Both endocytosis and bulk transport are correct.

Question 2

The primary intracellular cation is

Accepted Answer

A) Ca2+. 
B) K+. 
C) Mg2+. 
D) Na+.

Question 3

Ions like Ca2+ can be second messengers for cell signaling.

Accepted Answer

A) True 
 B)False

Question 4

Which of the following is able to passively penetrate the plasma membrane?

Accepted Answer

A) O2 
B) small charged particles 
C) large polar molecules 
D) All of these choices are correct.

Question 5

Active transport proceeds when energy is expended.

Accepted Answer

A) True 
 B)False

Question 6

The resting membrane potential is closest to the equilibrium potential for

Accepted Answer

A) sodium ions. 
B) chloride ions. 
C) calcium ions. 
D) potassium ions.

Question 7

Which regulatory molecule cannot enter its target cell?

Accepted Answer

A) epinephrine 
B) acetylcholine 
C) nitric oxide 
D) Both epinephrine and acetylcholine are correct.

Question 8

The extracellular matrix is made up of collagen,elastin,and a gel-like ground substance.

Accepted Answer

A) True 
 B)False

Question 9

Osmoreceptors are involved in the regulation of blood volume.

Accepted Answer

A) True 
 B)False

Question 10

Active transport carriers are also called

Accepted Answer

A) vesicles. 
B) channels. 
C) pumps. 
D) receptors.

Question 11

A one molar solution would contain 6.02 * 1023 molecules of solute.

Accepted Answer

A) True 
 B)False

Question 12

Osmosis and simple diffusion do NOT require the actions of carrier proteins.

Accepted Answer

A) True 
 B)False

Question 13

Which of the following is NOT a general category of cell signaling molecules?

Accepted Answer

A) endocrine signaling 
B) enzymatic signaling 
C) paracrine signaling 
D) synaptic signaling

Question 14

What type of cell signaling occurs through the extracellular matrix to nearby target cells?

Accepted Answer

A) endocrine signaling 
B) synaptic signaling 
C) gap junctions 
D) paracrine signaling

Question 15

Which of the following is NOT a G-protein?

Accepted Answer

A) alpha 
B) beta 
C) delta 
D) gamma

Question 16

What determines how a regulatory molecule influences its target cell?

Accepted Answer

A) polarity and solubility 
B) solubility and size 
C) size and polarity 
D) polarity,solubility,and size

Question 17

Dialysis uses the process of

Accepted Answer

A) facilitated diffusion. 
B) primary active transport. 
C) simple diffusion. 
D) secondary active transport.

Question 18

Facilitated diffusion is unable to transport molecules against a concentration gradient.

Accepted Answer

A) True 
 B)False

Exam 6: Interactions Between Cells and the Extracellular Environment

Movement of large molecules into a cell is called

The primary intracellular cation is

Ions like Ca²⁺ can be second messengers for cell signaling.

Which of the following is able to passively penetrate the plasma membrane?

Active transport proceeds when energy is expended.

The resting membrane potential is closest to the equilibrium potential for

Which regulatory molecule cannot enter its target cell?

The extracellular matrix is made up of collagen,elastin,and a gel-like ground substance.

Osmoreceptors are involved in the regulation of blood volume.

Active transport carriers are also called

A one molar solution would contain 6.02 * 10²³ molecules of solute.

Osmosis and simple diffusion do NOT require the actions of carrier proteins.

Which of the following is NOT a general category of cell signaling molecules?

What type of cell signaling occurs through the extracellular matrix to nearby target cells?

Which of the following is NOT a G-protein?

What determines how a regulatory molecule influences its target cell?

Dialysis uses the process of

Facilitated diffusion is unable to transport molecules against a concentration gradient.