Question 1

Discuss the role of calcium ions in the transmission of an action potential at the synapse.

Accepted Answer

An action potential reaching the axon te...

Question 2

When a second excitatory postsynaptic potential (EPSP) arrives at a single synapse before the effects of the first have disappeared,what results?

Accepted Answer

A)  hyperpolarization
B)  spatial summation
C)  temporal summation
D)  inhibition of the impulse

Question 3

Which of the following are organs of the central nervous system?

Accepted Answer

A)  spinal cord and spinal nerves
B)  brain,cranial nerves,spinal cord,and spinal nerves
C)  brain and cranial nerves
D)  brain and spinal cord

Question 4

Voltage-gated sodium channels have both an activation gate and:

Accepted Answer

A)  an inactivation gate.
B)  a threshold gate.
C)  a leak gate.
D)  a swinging gate.

Question 5

Explain the purpose of a neuronal pool.

Accepted Answer

Neuronal pools are networks of interneur...

Question 6

Which of the following is controlled by the somatic motor division?

Accepted Answer

A)  cardiac muscle
B)  glands
C)  smooth muscle
D)  skeletal muscle

Question 7

Which statement best describes the all-or-none principle?

Accepted Answer

A)  Local,or graded,potentials will always become action potentials.
B)  All voltage-gated sodium channels will open or none will open.
C)  An action potential happens completely,or it doesn't happen at all.
D)  All neurons conduct an action potential together,or none do.

Question 8

A local hyperpolarization that makes the membrane potential of the postsynaptic neuron more negative is:

Accepted Answer

A)  a saltatory stimulus.
B)  an excitatory postsynaptic potential (EPSP) .
C)  a temporal stimulus.
D)  an inhibitory postsynaptic potential (IPSP) .

Question 9

Upon entering your house,you noticed the smell of cake baking in the oven.What division of the peripheral nervous system is responsible?

Accepted Answer

A)  somatic sensory division
B)  visceral sensory division
C)  somatic motor division
D)  visceral motor division

Question 10

What would most likely lead to an inhibitory postsynaptic potential (IPSP) ?

Accepted Answer

A)  opening of calcium ion channels
B)  opening of sodium ion channels
C)  closure of chloride ion channels
D)  opening of potassium ion channels

Question 11

While driving home,Henry watched as a large truck drifted into his lane from oncoming traffic.Henry's central nervous system integrated this information to determine the position of his own vehicle,and then he made a decision to swerve his vehicle closer to the side of the road to avoid a head-on collision.From this scenario,determine the sensory information and his motor functions.

Accepted Answer

The collection of information about one'...

Question 12

Does a local potential guarantee the creation of an action potential? Explain.

Accepted Answer

A local potential must be strong enough ...

Question 13

If the receptor site for a neurotransmitter were completely blocked:

Accepted Answer

A)  synaptic transmission would fail.
B)  a weaker action potential would result.
C)  the presynaptic neuron would release a different neurotransmitter.
D)  neurotransmitter release would stop.

Question 14

Determine the fiber type in which propagation of an action potential will occur most quickly.

Accepted Answer

A)  type C fiber
B)  unmyelinated type B fiber
C)  myelinated type A fiber
D)  myelinated type B fiber

Question 15

Which nervous system division is responsible for the integration of sensory information?

Accepted Answer

A)  visceral motor division
B)  central nervous system
C)  peripheral nervous system
D)  somatic motor division

Question 16

Resting membrane potential is maintained by the sodium-potassium ion pump,or Na+/K+ ATPase,which brings:

Accepted Answer

A)  two potassium ions into the cytosol and two sodium ions into the extracellular fluid.
B)  three potassium ions into the cytosol and three sodium ions into the extracellular fluid.
C)  two potassium ions into the cytosol and three sodium ions into the extracellular fluid.
D)  three potassium ions into the cytosol and two sodium ions into the extracellular fluid.

Question 17

Branches that may occur along an axon are called:

Accepted Answer

A)  collaterals.
B)  dendrites.
C)  hillocks.
D)  telodendria.

Question 18

Which of the following moves the membrane potential of the postsynaptic neuron closer to threshold?

Accepted Answer

A)  inhibitory postsynaptic potential (IPSP) 
B)  hyperpolarization
C)  opening of potassium ion channels
D)  excitatory postsynaptic potential (EPSP)

Question 19

Regeneration of neural tissue in the peripheral nervous system (PNS)is possible only if the neuron's cell body remains intact.

Accepted Answer

A) True 
 B)False

Question 20

What ion triggers synaptic vesicles to release neurotransmitters into the synaptic cleft?

Accepted Answer

A)  calcium
B)  sodium
C)  chlorine
D)  magnesium

Exam 11: Introduction to the Nervous System Nervous Tissue

Determine the fiber type in which propagation of an action potential will occur most quickly.

Correct Answer
verified

Voltage-gated sodium channels have both an activation gate and:

Correct Answer
verified

Does a local potential guarantee the creation of an action potential? Explain.

Correct Answer
verified
A local potential must be strong enough ...
View Answer

Correct Answer
verified
The collection of information about one'...
View Answer

Which of the following is controlled by the somatic motor division?

Correct Answer
verified

Discuss the role of calcium ions in the transmission of an action potential at the synapse.

Correct Answer
verified
An action potential reaching the axon te...
View Answer

Which nervous system division is responsible for the integration of sensory information?

Correct Answer
verified

Explain the purpose of a neuronal pool.

Correct Answer
verified
Neuronal pools are networks of interneur...
View Answer

Regeneration of neural tissue in the peripheral nervous system (PNS)is possible only if the neuron's cell body remains intact.

Correct Answer
verified

What would most likely lead to an inhibitory postsynaptic potential (IPSP) ?

Correct Answer
verified

Which of the following are organs of the central nervous system?

Correct Answer
verified

A local hyperpolarization that makes the membrane potential of the postsynaptic neuron more negative is:

Correct Answer
verified

Upon entering your house,you noticed the smell of cake baking in the oven.What division of the peripheral nervous system is responsible?

Correct Answer
verified

Branches that may occur along an axon are called:

Correct Answer
verified

Which of the following moves the membrane potential of the postsynaptic neuron closer to threshold?

Correct Answer
verified

Which statement best describes the all-or-none principle?

Correct Answer
verified

If the receptor site for a neurotransmitter were completely blocked:

Correct Answer
verified

What ion triggers synaptic vesicles to release neurotransmitters into the synaptic cleft?

Correct Answer
verified

When a second excitatory postsynaptic potential (EPSP) arrives at a single synapse before the effects of the first have disappeared,what results?

Correct Answer
verified

Resting membrane potential is maintained by the sodium-potassium ion pump,or Na⁺/K⁺ATPase,which brings:

Correct Answer
verified

Exam 11: Introduction to the Nervous System Nervous Tissue

Determine the fiber type in which propagation of an action potential will occur most quickly.

Correct AnswerverifiedShow Answer

Voltage-gated sodium channels have both an activation gate and:

Correct AnswerverifiedShow Answer

Does a local potential guarantee the creation of an action potential? Explain.

Correct AnswerverifiedA local potential must be strong enough ...View AnswerShow Answer

Correct AnswerverifiedThe collection of information about one'...View AnswerShow Answer

Which of the following is controlled by the somatic motor division?

Correct AnswerverifiedShow Answer

Discuss the role of calcium ions in the transmission of an action potential at the synapse.

Correct AnswerverifiedAn action potential reaching the axon te...View AnswerShow Answer

Which nervous system division is responsible for the integration of sensory information?

Correct AnswerverifiedShow Answer

Explain the purpose of a neuronal pool.

Correct AnswerverifiedNeuronal pools are networks of interneur...View AnswerShow Answer

Regeneration of neural tissue in the peripheral nervous system (PNS)is possible only if the neuron's cell body remains intact.

Correct AnswerverifiedShow Answer

What would most likely lead to an inhibitory postsynaptic potential (IPSP) ?

Correct AnswerverifiedShow Answer

Which of the following are organs of the central nervous system?

Correct AnswerverifiedShow Answer

A local hyperpolarization that makes the membrane potential of the postsynaptic neuron more negative is:

Correct AnswerverifiedShow Answer

Upon entering your house,you noticed the smell of cake baking in the oven.What division of the peripheral nervous system is responsible?

Correct AnswerverifiedShow Answer

Branches that may occur along an axon are called:

Correct AnswerverifiedShow Answer

Which of the following moves the membrane potential of the postsynaptic neuron closer to threshold?

Correct AnswerverifiedShow Answer

Which statement best describes the all-or-none principle?

Correct AnswerverifiedShow Answer

If the receptor site for a neurotransmitter were completely blocked:

Correct AnswerverifiedShow Answer

What ion triggers synaptic vesicles to release neurotransmitters into the synaptic cleft?

Correct AnswerverifiedShow Answer

When a second excitatory postsynaptic potential (EPSP) arrives at a single synapse before the effects of the first have disappeared,what results?

Correct AnswerverifiedShow Answer

Resting membrane potential is maintained by the sodium-potassium ion pump,or Na+/K+ ATPase,which brings:

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
A local potential must be strong enough ...
View Answer

Correct Answer
verified
The collection of information about one'...
View Answer

Correct Answer
verified

Correct Answer
verified
An action potential reaching the axon te...
View Answer

Correct Answer
verified

Correct Answer
verified
Neuronal pools are networks of interneur...
View Answer

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

Resting membrane potential is maintained by the sodium-potassium ion pump,or Na⁺/K⁺ATPase,which brings:

Correct Answer
verified