Question 1

Match the ions, labelled a. through d., with their various roles. (Options may be used more than once or not at all.) 
-ion that is actively transported into the cell

Accepted Answer

A)  Na+
B)  K⁺
C)  A-
D)  Cl-E) A) and D)
F) None of the above B

Question 2

Which of these statements does NOT apply to the citric acid cycle

Accepted Answer

A)  It occurs in the mitochondrial matrix.
B)  Carbon dioxide is released.
C)  Several ATP molecules are produced for each cycle.
D)  Acetyl CoA and oxaloacetic CoA initially react to form citric acid.E) A) and B)
F) All of the above

Question 3

Which of these statements describes intermediate filaments

Accepted Answer

A)  They comprise mitotic spindles.
B)  They are important in cell regions subject to mechanical stress.
C)  They comprise cilia.
D)  They comprise flagella.E) B) and C)
F) None of the above

Question 4

The protective, waterproof outer layer of skin is formed by the tough skeleton of the microtrabecular lattice that persists after the surface skin cells die.

Accepted Answer

A) True 
 B)False

Question 5

What is stored in synaptic vesicles

Accepted Answer

A)  hormones
B)  neurotransmitters
C)  sodium ions
D)  glucoseE) None of the above
F) A) and B) B

Question 6

Phagocytosis is a specialized form of endocytosis used for bringing in extracellular fluids.

Accepted Answer

A) True 
 B)False  False

Question 7

Which of these statements describes the Na⁺-K⁺ pump

Accepted Answer

A)  It pumps Na⁺ into the cell.
B)  It pumps K⁺ into the cell.
C)  It pumps K⁺ out of the cell.
D)  It has a higher affinity for K⁺ when the carrier is phosphorylated.E) A) and B)
F) B) and C)

Question 8

Which of the following describes tight junctions

Accepted Answer

A)  They prevent passage of materials between epithelial cells.
B)  They force materials to pass between cells.
C)  They are commonly found in respiratory tract linings.
D)  They serve as avenues for the transfer of small molecules from one cell to the next.E) C) and D)
F) A) and B)

Question 9

In active transport, a substance moves from an area of ____________________ concentration to an area of ____________________ concentration.

Accepted Answer

The answer of In active transport, a substance moves from...

Question 10

Gap junctions are especially abundant in what kinds of tissue

Accepted Answer

A)  skeletal muscles and epithelial tissues
B)  epithelial tissues and smooth muscle
C)  cardiac muscle and smooth muscle
D)  brain tissue and cardiac muscleE) A) and D)
F) B) and C)

Question 11

The cytosol is the gel-like mass of the cytoplasm.

Accepted Answer

A) True 
 B)False

Question 12

Match the terms, labelled a. through c., to their descriptions. (Options may be used more than once or not at all.) 
-increase the surface area of the kidney tubules

Accepted Answer

A)  flagella
B)  cilia
C)  microvilliD) B) and C)
E) All of the above

Question 13

The grand postsynaptic potential depends on the sum of activity of the presynaptic inputs.

Accepted Answer

A) True 
 B)False

Question 14

Which of the following occurs at an excitatory synapse

Accepted Answer

A)  There is increased permeability of the subsynaptic membrane to both Na⁺ and K⁺.
B)  A small hyperpolarization occurs.
C)  An action potential in the presynaptic neuron always causes an action potential in the postsynaptic neuron.
D)  The presynaptic neuron increases the permeability of the subsynaptic membrane of the postsynaptic cell to K⁺ only.E) All of the above
F) None of the above

Question 15

Why does the relative refractory period occur after the action potential is complete

Accepted Answer

A)  because of the activation of the voltage-gated Na⁺ channels
B)  because of the slowness of the voltage-gated channels
C)  because of the sodium-potassium pump
D)  because of quick potassium effluxE) A) and D)
F) B) and C)

Question 16

Which of the following occurs when a membrane is stimulated due to opening of chemically gated Na⁺ channels

Accepted Answer

A)  An impulse is propagated.
B)  A graded potential is established.
C)  An action potential is established.
D)  The voltage becomes more negative.E) B) and D)
F) None of the above

Question 17

A given synapse is always excitatory or ____________________.

Accepted Answer

The answer of A given synapse is always excitatory or...

Question 18

Threshold potential is the peak potential achieved during an action potential.

Accepted Answer

A) True 
 B)False

Question 19

Match the terms, labelled a. through d., to their descriptions. (Options may be used more than once or not at all.) 
-provide a pathway for axonal transport

Accepted Answer

A)  microtubules
B)  microfilaments
C)  intermediate filaments
D)  micro trabecular latticeE) All of the above
F) None of the above

Question 20

Neurotransmitters are small, ____________________acting molecules.

Accepted Answer

The answer of Neurotransmitters are small, ____________________acting molecules....

Exam 2: Cell Physiology

Match the ions, labelled a. through d., with their various roles. (Options may be used more than once or not at all.) -ion that is actively transported into the cell

Correct AnswerverifiedB

Which of these statements does NOT apply to the citric acid cycle

Correct AnswerverifiedShow Answer

Which of these statements describes intermediate filaments

Correct AnswerverifiedShow Answer

The protective, waterproof outer layer of skin is formed by the tough skeleton of the microtrabecular lattice that persists after the surface skin cells die.

Correct AnswerverifiedShow Answer

What is stored in synaptic vesicles

Correct AnswerverifiedB

Phagocytosis is a specialized form of endocytosis used for bringing in extracellular fluids.

Correct AnswerverifiedFalse

Which of these statements describes the Na⁺-K⁺ pump

Correct AnswerverifiedShow Answer

Which of the following describes tight junctions

Correct AnswerverifiedShow Answer

In active transport, a substance moves from an area of ____________________ concentration to an area of ____________________ concentration.

Correct AnswerverifiedShow Answer

Gap junctions are especially abundant in what kinds of tissue

Correct AnswerverifiedShow Answer

The cytosol is the gel-like mass of the cytoplasm.

Correct AnswerverifiedShow Answer

Match the terms, labelled a. through c., to their descriptions. (Options may be used more than once or not at all.) -increase the surface area of the kidney tubules

Correct AnswerverifiedShow Answer

The grand postsynaptic potential depends on the sum of activity of the presynaptic inputs.

Correct AnswerverifiedShow Answer

Which of the following occurs at an excitatory synapse

Correct AnswerverifiedShow Answer

Why does the relative refractory period occur after the action potential is complete

Correct AnswerverifiedShow Answer

Which of the following occurs when a membrane is stimulated due to opening of chemically gated Na⁺ channels

Correct AnswerverifiedShow Answer

A given synapse is always excitatory or ____________________.

Correct AnswerverifiedShow Answer

Threshold potential is the peak potential achieved during an action potential.

Correct AnswerverifiedShow Answer

Match the terms, labelled a. through d., to their descriptions. (Options may be used more than once or not at all.) -provide a pathway for axonal transport

Correct AnswerverifiedShow Answer

Neurotransmitters are small, ____________________acting molecules.

Correct AnswerverifiedShow Answer

Correct Answer
verified
B

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
B

Correct Answer
verified
False

Correct Answer
verified

Correct Answer
verified

In active transport, a substance moves from an area of concentration to an area of concentration.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified