Question 1

Which of the following statements regarding voltage-gated K+ channels is true?

Accepted Answer

A)   These channels have only one gate.
B)   These channels open more slowly than Na+ channels.
C)   Once open, these channels remain open until repolarization is complete.
D)   These channels are specific for potassium.
E)   All of these statements are true.F) A) and C)
G) C) and E)

Question 2

A stimulus either causes an action potential or it doesn't. This is called

Accepted Answer

A)   an all-or-none response.
B)   a graded response.
C)   a latent period response.
D)   a relative refractory response.
E)   a local response.F) B) and E)
G) B) and D)

Question 3

Action potentials are conducted rapidly from one node of Ranvier to the next in a process called ____________ conduction.
saltatory

Accepted Answer

The answer of Action potentials are conducted rapidly from one...

Question 4

The figure illustrates the Action Potential. What does "D" represent?

Accepted Answer

A)   repolarization
B)   depolarization
C)   local potential
D)   threshold
E)   afterpotentialF) All of the above
G) C) and E)

Question 5

Match the term with the correct definition.
-Resting Membrane Potential

Accepted Answer

A)  a small change in the resting membrane potential confined to a small area
B)  a charge difference across the plasma membrane when the cell is in an unstimulated state
C)  a larger change in resting membrane potential that spreads over entire surface of a cell
D)  membrane becomes more positive when sodium ions diffuse into cell
E)  return to the resting membrane potentialF) C) and D)
G) B) and D)

Question 6

A change in resting membrane potential confined to a small area is called a(n)

Accepted Answer

A)   local potential.
B)   action potential.
C)   summated potential.
D)   after potential.
E)   resting membrane potential.F) A) and B)
G) A) and C)

Question 7

Nervous tissue of the CNS that is composed primarily of myelinated axons is often referred to as ______ matter.

Accepted Answer

A)   white
B)   light
C)   gray
D)   darkE) A) and D)
F) A) and C)

Question 8

The figure is a process figure of the chemical synapse. What does "A" represent?

Accepted Answer

A)   postsynaptic membrane
B)   synaptic cleft
C)   synaptic vesicle
D)   voltage-gated calcium channel
E)   presynaptic terminalF) A) and E)
G) B) and C)

Question 9

The plasma membrane of a neuron is more permeable to potassium ions because

Accepted Answer

A)   of its positive electrical charge.
B)   there are more leak ion channels for K+ than Na+.
C)   protein molecules cannot exit through the cell membrane.
D)   calcium ions block Na+ and Cl- channels.
E)   there are more leak ion channels for Na+ than K+.F) A) and E)
G) C) and E)

Question 10

The figure illustrates the Action Potential. What does "B" represent?

Accepted Answer

A)   repolarization
B)   depolarization
C)   local potential
D)   threshold
E)   afterpotentialF) All of the above
G) C) and E)

Question 11

During depolarization of the plasma membrane,

Accepted Answer

A)   sodium ions move rapidly into the cell.
B)   potassium ions move rapidly out of the cell.
C)   membrane permeability to sodium ions decreases.
D)   the outside of the cell becomes positively charged relative to the inside.
E)   sodium ions move rapidly out of the cell.F) B) and E)
G) C) and E)

Question 12

Identify the type of synapse that includes a presynaptic cell, synaptic cleft, and postsynaptic cell.

Accepted Answer

A)   direct
B)   indirect
C)   neurotransmitter
D)   electrical
E)   chemicalF) A) and B)
G) None of the above

Question 13

The motor (efferent)  division of the peripheral nervous system

Accepted Answer

A)   is a division of the CNS.
B)   regulates the digestion of food.
C)   transmits impulses from the CNS to skeletal muscle.
D)   has nerve cell bodies located in ganglia near the spinal cord and brain.
E)   detects a stimulus.F) C) and E)
G) C) and D)

Question 14

Nerve fibers are also called ____________.
axons

Accepted Answer

The answer of Nerve fibers are also called ____________.
axons...

Question 15

The enteric nervous system consists of plexuses within the walls of the

Accepted Answer

A)   brain.
B)   spinal cord.
C)   digestive tract.
D)   urinary bladder.E) B) and D)
F) All of the above

Question 16

Cell bodies of the peripheral nervous system are located in

Accepted Answer

A)   ganglia.
B)   Schwann cells.
C)   the motor division.
D)   the sensory division.
E)   nerves.F) A) and E)
G) None of the above

Question 17

Fran has a microbial infection attacking his brain. Which cell type would you expect to proliferate and be most active during this time?

Accepted Answer

A)   astrocytes
B)   microglial cells
C)   oligodendrocytes
D)   ependymal cells
E)   Schwann cellsF) A) and C)
G) A) and E)

Question 18

In an EPSP (excitatory postsynaptic potential) , there is a

Accepted Answer

A)   net movement of sodium ions out of the cells.
B)   net movement of chloride ions into the cells.
C)   decrease in action potential amplitude.
D)   local hyperpolarization.
E)   local depolarization.F) D) and E)
G) C) and D)

Question 19

The sensory (afferent)  division of the peripheral nervous system

Accepted Answer

A)   transmits action potentials to sensory organs.
B)   conveys action potentials to the CNS.
C)   stimulates glands to release hormones.
D)   stimulates muscle contractions.
E)   does not involve sensory receptors.F) None of the above
G) C) and D)

Question 20

The figure is a process figure of the chemical synapse. What does "D" represent?

Accepted Answer

A)   postsynaptic membrane
B)   synaptic cleft
C)   synaptic vesicle
D)   voltage-gated calcium channel
E)   presynaptic terminalF) All of the above
G) A) and D)

Exam 11: Functional Organization of Nervous Tissue

Identify the type of synapse that includes a presynaptic cell, synaptic cleft, and postsynaptic cell.

Correct AnswerverifiedShow Answer

The figure is a process figure of the chemical synapse. What does "D" represent?

Correct AnswerverifiedShow Answer

Which of the following statements regarding voltage-gated K+ channels is true?

Correct AnswerverifiedShow Answer

During depolarization of the plasma membrane,

Correct AnswerverifiedShow Answer

Action potentials are conducted rapidly from one node of Ranvier to the next in a process called ____________ conduction. saltatory

Correct AnswerverifiedShow Answer

In an EPSP (excitatory postsynaptic potential) , there is a

Correct AnswerverifiedShow Answer

A stimulus either causes an action potential or it doesn't. This is called

Correct AnswerverifiedShow Answer

A change in resting membrane potential confined to a small area is called a(n)

Correct AnswerverifiedShow Answer

The sensory (afferent) division of the peripheral nervous system

Correct AnswerverifiedShow Answer

Fran has a microbial infection attacking his brain. Which cell type would you expect to proliferate and be most active during this time?

Correct AnswerverifiedShow Answer

Nerve fibers are also called ____________. axons

Correct AnswerverifiedShow Answer

The figure is a process figure of the chemical synapse. What does "A" represent?

Correct AnswerverifiedShow Answer

The figure illustrates the Action Potential. What does "B" represent?

Correct AnswerverifiedShow Answer

The motor (efferent) division of the peripheral nervous system

Correct AnswerverifiedShow Answer

The enteric nervous system consists of plexuses within the walls of the

Correct AnswerverifiedShow Answer

Cell bodies of the peripheral nervous system are located in

Correct AnswerverifiedShow Answer

Match the term with the correct definition. -Resting Membrane Potential

Correct AnswerverifiedShow Answer

The figure illustrates the Action Potential. What does "D" represent?

Correct AnswerverifiedShow Answer

Nervous tissue of the CNS that is composed primarily of myelinated axons is often referred to as ______ matter.

Correct AnswerverifiedShow Answer

The plasma membrane of a neuron is more permeable to potassium ions because

Correct AnswerverifiedShow Answer

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