HCS 215 Chapter 11 Test Bank Questions With Complete
Solutions
36) Students who suffer from test anxiety often have some of the
following symptoms: the need for frequent urination, dilated
pupils, and a dry mouth. What branch of the autonomic nervous
system would cause these symptoms?
A) sympathetic
B) parasympathetic
C) somatic
D) voluntary
E) enteric Correct Answers A
37) The somatic nervous system regulates the activity of
A) endocrine organs.
B) many organs.
C) skeletal muscle.
D) the kidneys.
E) the cardiovascular system. Correct Answers C
38) The somatic nervous system is often referred to as the
________ system.
A) voluntary
B) involuntary
C) unconscious
D) craniosacral
E) neuromuscular Correct Answers A
39) With respect to their innervation, individual skeletal muscle
fibers (cells) are innervated by
A) a single motor neuron.
,B) multiple motor neurons.
C) a single motor neuron and autonomic neuron.
D) multiple motor neurons and autonomic neurons.
E) a single motor neuron and multiple autonomic neurons.
Correct Answers A
40) What is the neurotransmitter released from motor neurons?
A) epinephrine
B) norepinephrine
C) acetylcholine
D) dopamine
E) GABA Correct Answers C
41) Where on skeletal muscle is the highest density of nicotinic
receptors?
A) terminal bouton
B) motor end plate
C) motor unit
D) dendrites
E) axon hillock Correct Answers B
42) Which of the following is located between the invaginations
of the motor end plate of a neuromuscular junction?
A) ?2 receptors
B) ?3 receptors
C) acetylcholinesterase
D) muscarinic receptors
E) nicotinic receptors Correct Answers C
43) What is the graded change in membrane potential that
occurs at the motor end plate of skeletal muscle called?
, A) inhibitory postsynaptic potential
B) end-plate potential
C) muscarinic potential
D) adrenergic potential
E) action potential Correct Answers B
44) The opening of a cation channel that allows both Na+ and
K+ to move through will cause the membrane to ________
because of the ________.
A) hyperpolarize : greater K+ electrochemical gradient as
compared with Na+
B) hyperpolarize : greater Na+ electrochemical gradient as
compared with K+
C) depolarize : greater K+ electrochemical gradient as compared
with Na+
D) depolarize : greater Na+ electrochemical gradient as
compared with K+
E) not change : same electrochemical gradient for K+ and Na+
Correct Answers D
45) Which of the following statements is TRUE of
communication across the neuromuscular junction?
A) Acetylcholine released from a motor neuron binds to
muscarinic cholinergic receptors.
B) The end-plate potential is always of sufficient magnitude to
depolarize the muscle cell to threshold to initiate an action
potential.
C) Acetylcholinesterase located in the cytosol of the motor
neuron degrades acetylcholine to acetate and choline.
D) Acetylcholinesterase located in mitochondria of the motor
neuron degrades acetylcholine to acetate and choline.
Solutions
36) Students who suffer from test anxiety often have some of the
following symptoms: the need for frequent urination, dilated
pupils, and a dry mouth. What branch of the autonomic nervous
system would cause these symptoms?
A) sympathetic
B) parasympathetic
C) somatic
D) voluntary
E) enteric Correct Answers A
37) The somatic nervous system regulates the activity of
A) endocrine organs.
B) many organs.
C) skeletal muscle.
D) the kidneys.
E) the cardiovascular system. Correct Answers C
38) The somatic nervous system is often referred to as the
________ system.
A) voluntary
B) involuntary
C) unconscious
D) craniosacral
E) neuromuscular Correct Answers A
39) With respect to their innervation, individual skeletal muscle
fibers (cells) are innervated by
A) a single motor neuron.
,B) multiple motor neurons.
C) a single motor neuron and autonomic neuron.
D) multiple motor neurons and autonomic neurons.
E) a single motor neuron and multiple autonomic neurons.
Correct Answers A
40) What is the neurotransmitter released from motor neurons?
A) epinephrine
B) norepinephrine
C) acetylcholine
D) dopamine
E) GABA Correct Answers C
41) Where on skeletal muscle is the highest density of nicotinic
receptors?
A) terminal bouton
B) motor end plate
C) motor unit
D) dendrites
E) axon hillock Correct Answers B
42) Which of the following is located between the invaginations
of the motor end plate of a neuromuscular junction?
A) ?2 receptors
B) ?3 receptors
C) acetylcholinesterase
D) muscarinic receptors
E) nicotinic receptors Correct Answers C
43) What is the graded change in membrane potential that
occurs at the motor end plate of skeletal muscle called?
, A) inhibitory postsynaptic potential
B) end-plate potential
C) muscarinic potential
D) adrenergic potential
E) action potential Correct Answers B
44) The opening of a cation channel that allows both Na+ and
K+ to move through will cause the membrane to ________
because of the ________.
A) hyperpolarize : greater K+ electrochemical gradient as
compared with Na+
B) hyperpolarize : greater Na+ electrochemical gradient as
compared with K+
C) depolarize : greater K+ electrochemical gradient as compared
with Na+
D) depolarize : greater Na+ electrochemical gradient as
compared with K+
E) not change : same electrochemical gradient for K+ and Na+
Correct Answers D
45) Which of the following statements is TRUE of
communication across the neuromuscular junction?
A) Acetylcholine released from a motor neuron binds to
muscarinic cholinergic receptors.
B) The end-plate potential is always of sufficient magnitude to
depolarize the muscle cell to threshold to initiate an action
potential.
C) Acetylcholinesterase located in the cytosol of the motor
neuron degrades acetylcholine to acetate and choline.
D) Acetylcholinesterase located in mitochondria of the motor
neuron degrades acetylcholine to acetate and choline.
