Question 1

Even though all action potentials are the same,the brain can differentiate a variety of stimuli by source and intensity.The mechanism by which the nervous system converts these action potentials into meaningful information is called neural __________.

Accepted Answer

A)   recruitment
B)   pooling
C)   integration
D)   facilitation
E)   codingF) D) and E)
G) B) and C)

Question 2

Place the following events in synaptic transmission at a cholinergic synapse in order: A - A postsynaptic potential is produced;B - Voltage gated calcium channels open and calcium enters the cell;C - ACh is released and diffuses across the axon terminal;D - A nerve signal arrives at an axon terminal;E - Ligand gated sodium channels open and sodium enters the cell.

Accepted Answer

A)   D,B,C,E,A
B)   D,B,E,A,C
C)   B,C,D,E,A
D)   B,D,C,A,EE) B) and D)
F) None of the above

Question 3

If a neuron is prevented from sending a neurotransmitter across a synapse to another cell,which neuron property is being inhibited?

Accepted Answer

A)   Secretion
B)   Excitability
C)   Conductivity
D)   PermeabilityE) None of the above
F) All of the above

Question 4

When a neuron is stimulated,Na+ gates open and allow Na+ to exit the cell.

Accepted Answer

A) True 
 B)False

Question 5

In an action potential,which event directly follows repolarization?

Accepted Answer

A)   Threshold is reached
B)   Hyperpolarization of the membrane
C)   Depolarization of the membrane
D)   Hypopolarization of the membrane
E)   The resting membrane potential is reinstatedF) C) and D)
G) B) and C)

Question 6

Which of the following will cause the plasma membrane to hyperpolarize when at its RMP?

Accepted Answer

A)   An inflow of sodium
B)   An inflow of potassium
C)   An inflow of calcium
D)   An inflow of chloride
E)   An outflow of chlorideF) C) and D)
G) A) and B)

Question 7

Some __________ neurons are specialized to detect stimuli,whereas __________ neurons send signals to the effectors of the nervous system.

Accepted Answer

A)   efferent;afferent
B)   afferent;efferent
C)   motor;sensory
D)   efferent;inter-
E)   afferent;inter-F) D) and E)
G) A) and B)

Question 8

Which of these happens first in an cholinergic synaptic transmission?

Accepted Answer

A)   Acetylcholine diffuses across the synaptic cleft
B)   A postsynaptic potential is produced
C)   Sodium enters the postsynaptic cell
D)   The synaptic vesicles release acetylcholine
E)   Acetylcholine binds to ligand-regulated gatesF) A) and B)
G) B) and E)

Question 9

During the absolute refractory period which of the following is true?

Accepted Answer

A)   If a neuron reaches threshold,the action potential goes to completion.
B)   The neuron fires at its maximum voltage if a stimulus depolarizes the neuron to threshold.
C)   The signal grows weaker with distance.
D)   It is possible to trigger a new action potential,but only with an unusually strong stimulus.
E)   No stimulus of any strength will trigger a new action potential.F) A) and D)
G) A) and B)

Question 10

Which of these does not contribute to the cessation of the signal in a synaptic transmission?

Accepted Answer

A)   Synaptic vesicles secrete neurotransmitter by exocytosis.
B)   Neurotransmitter escapes from the synapse into the nearby extracellular fluid.
C)   Neurotransmitters are no longer released.
D)   The axon terminal reabsorbs some neurotransmitters by endocytosis.
E)   Enzymes in the postsynaptic cell break down some neurotransmitters.F) C) and E)
G) D) and E)

Question 11

The __________ division tends to prepare the body for action.

Accepted Answer

A)   sensory afferent
B)   motor afferent
C)   somatic motor
D)   parasympathetic
E)   sympatheticF) B) and D)
G) A) and E)

Question 12

An inhibitory local potential causes which of the following?

Accepted Answer

A)   Depolarization of the plasma membrane
B)   Hyperpolarization of the plasma membrane
C)   Repolarization of the plasma membrane
D)   Neutralization of the plasma membrane
E)   Drifting of the membrane potential towards the resting membrane potentialF) A) and D)
G) C) and E)

Question 13

The __________ division carries signals to the smooth muscle in the large intestine.

Accepted Answer

A)   visceral sensory
B)   somatic sensory
C)   visceral motor
D)   somatic motor
E)   afferentF) B) and C)
G) C) and E)

Question 14

A traveling wave of excitation is known as a(n) __________.

Accepted Answer

A)   local potential
B)   graded potential
C)   action potential
D)   nerve signal
E)   depolarizing signalF) C) and E)
G) A) and D)

Question 15

Nerves are __________ of the nervous system.

Accepted Answer

A)   organs
B)   tissues
C)   organ systems
D)   organelles
E)   cellsF) B) and D)
G) C) and E)

Question 16

What type of neural circuit is best for producing a prolonged output?

Accepted Answer

A)   A converging circuit
B)   A diverging circuit
C)   A reverberating circuit
D)   A presynaptic pool
E)   An autonomic poolF) B) and E)
G) A) and B)

Question 17

Where do most local potentials form in a neuron?

Accepted Answer

A)   The dendrites
B)   The neurosomas
C)   The axon hillock
D)   The trigger zone
E)   The Schwann cellsF) B) and C)
G) A) and C)

Question 18

Accumulation of Ca2+ in the axon terminal is called __________,and probably plays an important role in __________.

Accepted Answer

A)   synaptic facilitation;short-term memory
B)   neural coding;immediate memory
C)   postsynaptic potential;long-term memory
D)   neural coding;short-term memory
E)   long-term potentiation;long-term memoryF) A) and B)
G) B) and D)

Question 19

Local potentials are __________,meaning they vary in magnitude according to the strength of the stimulus.

Accepted Answer

A)   stabile
B)   graded
C)   self propagating
D)   excitatory
E)   inhibitoryF) B) and C)
G) C) and D)

Question 20

Local potentials are __________,whereas action potentials are __________.

Accepted Answer

A)   irreversible;reversible
B)   self-propagating;local
C)   graded;all or none
D)   nondecremental;decremental
E)   produced by voltage-regulated channels;produced by gated channelsF) A) and C)
G) None of the above

Exam 12: Nervous Tissue

Which of these happens first in an cholinergic synaptic transmission?

Correct Answer
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Correct Answer
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Some neurons are specialized to detect stimuli,whereas neurons send signals to the effectors of the nervous system.

Correct Answer
verified

If a neuron is prevented from sending a neurotransmitter across a synapse to another cell,which neuron property is being inhibited?

Correct Answer
verified

The __________ division carries signals to the smooth muscle in the large intestine.

Correct Answer
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Nerves are __________ of the nervous system.

Correct Answer
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Which of these does not contribute to the cessation of the signal in a synaptic transmission?

Correct Answer
verified

What type of neural circuit is best for producing a prolonged output?

Correct Answer
verified

Which of the following will cause the plasma membrane to hyperpolarize when at its RMP?

Correct Answer
verified

Even though all action potentials are the same,the brain can differentiate a variety of stimuli by source and intensity.The mechanism by which the nervous system converts these action potentials into meaningful information is called neural __________.

Correct Answer
verified

A traveling wave of excitation is known as a(n) __________.

Correct Answer
verified

Local potentials are __________,meaning they vary in magnitude according to the strength of the stimulus.

Correct Answer
verified

When a neuron is stimulated,Na⁺ gates open and allow Na⁺ to exit the cell.

Correct Answer
verified

The __________ division tends to prepare the body for action.

Correct Answer
verified

Where do most local potentials form in a neuron?

Correct Answer
verified

In an action potential,which event directly follows repolarization?

Correct Answer
verified

Accumulation of Ca²⁺ in the axon terminal is called ,and probably plays an important role in .

Correct Answer
verified

During the absolute refractory period which of the following is true?

Correct Answer
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An inhibitory local potential causes which of the following?

Correct Answer
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Local potentials are ,whereas action potentials are .

Correct Answer
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Exam 12: Nervous Tissue

Which of these happens first in an cholinergic synaptic transmission?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Some __________ neurons are specialized to detect stimuli,whereas __________ neurons send signals to the effectors of the nervous system.

Correct AnswerverifiedShow Answer

If a neuron is prevented from sending a neurotransmitter across a synapse to another cell,which neuron property is being inhibited?

Correct AnswerverifiedShow Answer

The __________ division carries signals to the smooth muscle in the large intestine.

Correct AnswerverifiedShow Answer

Nerves are __________ of the nervous system.

Correct AnswerverifiedShow Answer

Which of these does not contribute to the cessation of the signal in a synaptic transmission?

Correct AnswerverifiedShow Answer

What type of neural circuit is best for producing a prolonged output?

Correct AnswerverifiedShow Answer

Which of the following will cause the plasma membrane to hyperpolarize when at its RMP?

Correct AnswerverifiedShow Answer

Even though all action potentials are the same,the brain can differentiate a variety of stimuli by source and intensity.The mechanism by which the nervous system converts these action potentials into meaningful information is called neural __________.

Correct AnswerverifiedShow Answer

A traveling wave of excitation is known as a(n) __________.

Correct AnswerverifiedShow Answer

Local potentials are __________,meaning they vary in magnitude according to the strength of the stimulus.

Correct AnswerverifiedShow Answer

When a neuron is stimulated,Na+ gates open and allow Na+ to exit the cell.

Correct AnswerverifiedShow Answer

The __________ division tends to prepare the body for action.

Correct AnswerverifiedShow Answer

Where do most local potentials form in a neuron?

Correct AnswerverifiedShow Answer

In an action potential,which event directly follows repolarization?

Correct AnswerverifiedShow Answer

Accumulation of Ca2+ in the axon terminal is called __________,and probably plays an important role in __________.

Correct AnswerverifiedShow Answer

During the absolute refractory period which of the following is true?

Correct AnswerverifiedShow Answer

An inhibitory local potential causes which of the following?

Correct AnswerverifiedShow Answer

Local potentials are __________,whereas action potentials are __________.

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
verified

Some neurons are specialized to detect stimuli,whereas neurons send signals to the effectors of the nervous system.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
verified

When a neuron is stimulated,Na⁺ gates open and allow Na⁺ to exit the cell.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Accumulation of Ca²⁺ in the axon terminal is called ,and probably plays an important role in .

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Local potentials are ,whereas action potentials are .

Correct Answer
verified