Question 1

Intracellular fluid is rich in

Accepted Answer

A)   K+, with small amounts of Na+ and Cl?.
B)   K+ and Cl?, with very small amounts of Na+.
C)   Cl?, with very small amounts of K+ and Na+.
D)   Na+ and Cl?, with small amounts of K+.

Question 2

Which of the types of cytoskeleton fiber may be involved with structural changes in response to learning?

Accepted Answer

A)   microfilaments
B)   neurofilaments
C)   tau proteins
D)   microtubules

Question 3

A structural matrix for neurons is provided by

Accepted Answer

A)   astrocytes.
B)   oligodendrocytes.
C)   Schwann cells.
D)   microglia.

Question 4

The most common structural type of neuron in the vertebrate nervous system is the

Accepted Answer

A)   unipolar neuron.
B)   bipolar neuron.
C)   multipolar neuron.
D)   interneuron.

Question 5

Calcium pumps differ from sodium-potassium pumps in that they

Accepted Answer

A)   do not require energy in order to operate.
B)   are rarely found in the CNS.
C)   do not collect another type of ion in exchange for the calcium they pump out of the cell.
D)   are not essential for the healthy operation of the nervous system.

Question 6

A commonly used method of lethal injection involves the injection of potassium. Explain why having too much potassium in your extracellular fluid would be fatal.

Accepted Answer

The process of lethal injection uses a c...

Question 7

Myelinated axons have large numbers of ion channels

Accepted Answer

A)   along the entire length.
B)   at the axon hillock and nodes of Ranvier.
C)   only at the axon terminals.
D)   only at the axon hillock.

Question 8

Myelinated axons in human beings conduct action potentials about _________ unmyelinated axons in invertebrates.

Accepted Answer

A)   as fast as
B)   half as fast as
C)   six times faster than
D)   24 times faster than

Question 9

Ribosomes are built by the

Accepted Answer

A)   endoplasmic reticulum.
B)   nucleolus
C)   mitochondria.
D)   Golgi apparatus.

Question 10

An important function of the astrocytes is to regulate the chemical environment of the synaptic gap. The ability of astrocytes to remove which of the following chemicals from the synaptic gap is especially important?

Accepted Answer

A)   magnesium
B)   potassium
C)   sodium
D)   tetrodotoxin

Question 11

Branches that serve as locations at which information is received from other neurons are known as

Accepted Answer

A)   dendrites.
B)   ribosomes.
C)   mitochondria.
D)   cell bodies.

Question 12

Your brain differentiates between a tap on your arm and a sharp slap on your arm by the

Accepted Answer

A)   number of action potentials produced in response to the sensory input.
B)   size of the action potentials produced in response to the sensory input.
C)   kind of neurotransmitters released at the synapse of the sensory neuron.
D)   number (two or more different kinds)  of neurotransmitters released at the synapse of the sensory neuron.

Question 13

Which type of glia actually helps guide the regrowth of axons following injury?

Accepted Answer

A)   astrocytes
B)   oligodendrocytes
C)   Schwann cells
D)   microglia

Question 14

In order to understand the way the brain and nervous system function, it is important to remember that

Accepted Answer

A)   the nervous system communicates primarily via electrical messages.
B)   the nervous system communicates primarily via chemical messages.
C)   communication in the nervous system depends on how large the action potentials are.
D)   communication in the nervous system is dependent on both electrical and chemical messages.

Question 15

If you were designing communication between two neurons, would you choose to myelinate the presynaptic axon? Why or why not?

Accepted Answer

If I were designing communication betwee...

Question 16

In a healthy brain, adjacent microtubules are connected by

Accepted Answer

A)   microfilaments.
B)   neurofilaments.
C)   tau proteins.
D)   phospholipids.

Question 17

As much as 20 to 40 percent of the energy required by the brain is used by

Accepted Answer

A)   sodium-potassium pumps.
B)   calcium pumps.
C)   anterograde transport within neurons.
D)   retrograde transport within neurons.

Question 18

Ion selectivity is a feature of

Accepted Answer

A)   both ion channels and ion pumps.
B)   neither ion channels nor ion pumps.
C)   ion channels but not ion pumps.
D)   ion pumps but not ion channels.

Question 19

As seen in the picture, the relative refractory period begins approximately _________ msec after the beginning of the rise of the action potential.

Accepted Answer

A)   Zero
B)   1
C)   2
D)   3.5

Question 20

Compared with ionotropic receptors, metabotropic receptors respond more

Accepted Answer

A)   rapidly but with shorter-lasting effects.
B)   rapidly and have longer-lasting effects.
C)   slowly but with shorter-lasting effects.
D)   slowly and have longer-lasting effects.

Exam 3: Neurophysiology: The Structure and Functions of the Cells of the Nervous System

As much as 20 to 40 percent of the energy required by the brain is used by

Correct Answer
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Myelinated axons in human beings conduct action potentials about _________ unmyelinated axons in invertebrates.

Correct Answer
verified

Intracellular fluid is rich in

Correct Answer
verified

Compared with ionotropic receptors, metabotropic receptors respond more

Correct Answer
verified

An important function of the astrocytes is to regulate the chemical environment of the synaptic gap. The ability of astrocytes to remove which of the following chemicals from the synaptic gap is especially important?

Correct Answer
verified

Ribosomes are built by the

Correct Answer
verified

If you were designing communication between two neurons, would you choose to myelinate the presynaptic axon? Why or why not?

Correct Answer
Answered by ExamLex AI
If I were designing communication betwee...
View Answer

Your brain differentiates between a tap on your arm and a sharp slap on your arm by the

Correct Answer
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In order to understand the way the brain and nervous system function, it is important to remember that

Correct Answer
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In a healthy brain, adjacent microtubules are connected by

Correct Answer
verified

A structural matrix for neurons is provided by

Correct Answer
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The most common structural type of neuron in the vertebrate nervous system is the

Correct Answer
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Myelinated axons have large numbers of ion channels

Correct Answer
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A commonly used method of lethal injection involves the injection of potassium. Explain why having too much potassium in your extracellular fluid would be fatal.

Correct Answer
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The process of lethal injection uses a c...
View Answer

Correct Answer
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Ion selectivity is a feature of

Correct Answer
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Which type of glia actually helps guide the regrowth of axons following injury?

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Which of the types of cytoskeleton fiber may be involved with structural changes in response to learning?

Correct Answer
verified

Branches that serve as locations at which information is received from other neurons are known as

Correct Answer
verified

Calcium pumps differ from sodium-potassium pumps in that they

Correct Answer
verified

Exam 3: Neurophysiology: The Structure and Functions of the Cells of the Nervous System

As much as 20 to 40 percent of the energy required by the brain is used by

Correct AnswerverifiedShow Answer

Myelinated axons in human beings conduct action potentials about _________ unmyelinated axons in invertebrates.

Correct AnswerverifiedShow Answer

Intracellular fluid is rich in

Correct AnswerverifiedShow Answer

Compared with ionotropic receptors, metabotropic receptors respond more

Correct AnswerverifiedShow Answer

An important function of the astrocytes is to regulate the chemical environment of the synaptic gap. The ability of astrocytes to remove which of the following chemicals from the synaptic gap is especially important?

Correct AnswerverifiedShow Answer

Ribosomes are built by the

Correct AnswerverifiedShow Answer

If you were designing communication between two neurons, would you choose to myelinate the presynaptic axon? Why or why not?

Correct AnswerAnswered by ExamLex AIIf I were designing communication betwee...View AnswerShow Answer

Your brain differentiates between a tap on your arm and a sharp slap on your arm by the

Correct AnswerverifiedShow Answer

In order to understand the way the brain and nervous system function, it is important to remember that

Correct AnswerverifiedShow Answer

In a healthy brain, adjacent microtubules are connected by

Correct AnswerverifiedShow Answer

A structural matrix for neurons is provided by

Correct AnswerverifiedShow Answer

The most common structural type of neuron in the vertebrate nervous system is the

Correct AnswerverifiedShow Answer

Myelinated axons have large numbers of ion channels

Correct AnswerverifiedShow Answer

A commonly used method of lethal injection involves the injection of potassium. Explain why having too much potassium in your extracellular fluid would be fatal.

Correct AnswerverifiedThe process of lethal injection uses a c...View AnswerShow Answer

As seen in the picture, the relative refractory period begins approximately _________ msec after the beginning of the rise of the action potential.

Correct AnswerverifiedShow Answer

Ion selectivity is a feature of

Correct AnswerverifiedShow Answer

Which type of glia actually helps guide the regrowth of axons following injury?

Correct AnswerverifiedShow Answer

Which of the types of cytoskeleton fiber may be involved with structural changes in response to learning?

Correct AnswerverifiedShow Answer

Branches that serve as locations at which information is received from other neurons are known as

Correct AnswerverifiedShow Answer

Calcium pumps differ from sodium-potassium pumps in that they

Correct AnswerverifiedShow Answer

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Correct Answer
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If I were designing communication betwee...
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The process of lethal injection uses a c...
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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