Question 1

Which part of a neuron could be covered with a myelin sheath?

Accepted Answer

A)   nucleus
B)   axon
C)   dendrite
D)   cell body
E)   terminalF) A) and E)
G) C) and D)

Question 2

Contraction of the uterus during childbirth is stimulated by

Accepted Answer

A)   prolactin.
B)   luteinizing hormone (LH) .
C)   oxytocin.
D)   glucagon.
E)   parathyroid hormone (PTH) .F) A) and B)
G) B) and C)

Question 3

The exophthalmos seen in Graves disease results from hypersecretion of the

Accepted Answer

A)   thyroid gland.
B)   parathyroid glands.
C)   posterior pituitary.
D)   adrenal cortex.
E)   pancreas.F) B) and C)
G) None of the above

Question 4

Which of these is mismatched?

Accepted Answer

A)   diencephalon-thalamus
B)   brain stem-medulla oblongata
C)   cerebral cortex-occipital lobe
D)   cerebellum-midbrain
E)   frontal lobe-prefrontal areaF) C) and E)
G) A) and B)

Question 5

Which type of neuron is completely contained within the CNS?

Accepted Answer

A)   sensory neuron
B)   motor neuron
C)   autonomic neuron
D)   interneuron
E)   sympathetic neuronF) B) and D)
G) A) and E)

Question 6

Gigantism can result from excessive secretion from the

Accepted Answer

A)   posterior pituitary.
B)   anterior pituitary.
C)   adrenal medulla.
D)   adrenal cortex.
E)   pancreas.F) D) and E)
G) A) and D)

Question 7

A spinal nerve contains

Accepted Answer

A)   axons of sensory neurons only.
B)   myelinated axons only.
C)   axons of motor neurons only.
D)   dendrites only.
E)   both sensory and motor axons.F) None of the above
G) A) and D)

Question 8

If an individual's pancreatic islets have been destroyed, the result will be

Accepted Answer

A)   Cushing syndrome.
B)   Graves disease.
C)   type 2 diabetes mellitus.
D)   Addison disease.
E)   type 1 diabetes mellitus.F) B) and D)
G) D) and E)

Question 9

Gaps in the myelin sheath are termed

Accepted Answer

A)   nodes of Ranvier.
B)   interaxons.
C)   ganglia.
D)   nuclei.
E)   synapses.F) A) and D)
G) All of the above

Question 10

A patient's pons has been affected by a rapidly growing tumor. Of the choices listed below, which is the most likely result?

Accepted Answer

A)   loss of the normal breathing rhythm
B)   hearing loss
C)   inability to understand speech
D)   inability to regulate blood pressure
E)   inability to experience emotionsF) All of the above
G) C) and D)

Question 11

You are relaxing, having a snack and watching TV, when suddenly the entire house begins to shake violently. The activity of your _____ quickly decreases, while that of your _____ increases.

Accepted Answer

A)   somatic nervous system; autonomic nervous system
B)   autonomic nervous system; somatic nervous system
C)   sympathetic division; parasympathetic division
D)   sympathetic division; somatic nervous system
E)   parasympathetic division; sympathetic divisionF) B) and D)
G) D) and E)

Question 12

The arrow shows the direction of the nerve impulse in a neuron. Part X would represent a(n)  ________.

Accepted Answer

A)   axon
B)   dendrite
C)   cell body
D)   myelin sheath
E)   axon terminalF) C) and E)
G) None of the above B

Question 13

The arrow shows the direction of the nerve impulse in a neuron. Where is the neurotransmitter released from the neuron?

Accepted Answer

A)   axon
B)   dendrite
C)   cell body
D)   myelin sheath
E)   axon terminalF) All of the above
G) C) and E)

Question 14

Long, myelinated nerve fibers are called _____ in the PNS and _____ in the CNS.

Accepted Answer

A)   tracts; nuclei
B)   nerves; ganglia
C)   ganglia; nuclei
D)   nerves; tracts
E)   ganglia; tractsF) C) and D)
G) A) and B)

Question 15

The spinal cord's gray matter is located

Accepted Answer

A)   on the outside, surrounding a central core of white matter.
B)   on the inside, surrounding the central canal.
C)   on both the inside and the outside.
D)   neither inside nor outside-the spinal cord is entirely white matter.
E)   scattered among a collection of ganglia.F) A) and C)
G) A) and D) B

Question 16

Only the glands of the endocrine system

Accepted Answer

A)   uses chemical signals to bring about changes in target organs.
B)   works to regulate the activities of other body systems.
C)   uses the bloodstream to convey signals throughout the body.
D)   helps to maintain homeostasis.
E)   brings about rapid responses by target organs.F) A) and D)
G) A) and C)

Question 17

A nerve impulse travels down a myelinated axon by

Accepted Answer

A)   repolarization.
B)   saltatory conduction.
C)   simple diffusion.
D)   integration.
E)   summation.F) A) and B)
G) A) and C)

Question 18

Which of these works by inhibiting dopamine reuptake into synapses?

Accepted Answer

A)   cocaine
B)   THC (tetrahydrocannabinol) 
C)   heroin
D)   marijuana
E)   all drugs of abuseF) C) and E)
G) B) and E)

Question 19

If a neuron receives both excitatory and inhibitory signals, will an action potential be generated?

Accepted Answer

A)   No, because any inhibitory signals will cancel out the excitatory signals.
B)   Yes, but the action potential will be much smaller than if only excitatory signals were received.
C)   It depends; if more excitatory than inhibitory signals are received, then an action potential may result.
D)   Yes, because excitatory signals always stimulate an action potential.
E)   It depends; if more inhibitory than excitatory signals are received, then the neuron will be free to produce an action potential.F) A) and B)
G) All of the above C

Question 20

_____ inhibits osteoclasts, and _____ stimulates them.

Accepted Answer

A)   Parathyroid hormone (PTH) ; calcitonin
B)   Growth hormone (GH) ; calcitonin
C)   Epinephrine; norepinephrine
D)   Calcitonin; parathyroid hormone (PTH) 
E)   Glucagon; growth hormone (GH) F) B) and D)
G) None of the above

Exam 27: Control Systems

Which part of a neuron could be covered with a myelin sheath?

Correct AnswerverifiedShow Answer

Contraction of the uterus during childbirth is stimulated by

Correct AnswerverifiedShow Answer

The exophthalmos seen in Graves disease results from hypersecretion of the

Correct AnswerverifiedShow Answer

Which of these is mismatched?

Correct AnswerverifiedShow Answer

Which type of neuron is completely contained within the CNS?

Correct AnswerverifiedShow Answer

Gigantism can result from excessive secretion from the

Correct AnswerverifiedShow Answer

A spinal nerve contains

Correct AnswerverifiedShow Answer

If an individual's pancreatic islets have been destroyed, the result will be

Correct AnswerverifiedShow Answer

Gaps in the myelin sheath are termed

Correct AnswerverifiedShow Answer

A patient's pons has been affected by a rapidly growing tumor. Of the choices listed below, which is the most likely result?

Correct AnswerverifiedShow Answer

You are relaxing, having a snack and watching TV, when suddenly the entire house begins to shake violently. The activity of your _____ quickly decreases, while that of your _____ increases.

Correct AnswerverifiedShow Answer

The arrow shows the direction of the nerve impulse in a neuron. Part X would represent a(n) ________.

Correct AnswerverifiedB

The arrow shows the direction of the nerve impulse in a neuron. Where is the neurotransmitter released from the neuron?

Correct AnswerverifiedShow Answer

Long, myelinated nerve fibers are called _____ in the PNS and _____ in the CNS.

Correct AnswerverifiedShow Answer

The spinal cord's gray matter is located

Correct AnswerverifiedB

Only the glands of the endocrine system

Correct AnswerverifiedShow Answer

A nerve impulse travels down a myelinated axon by

Correct AnswerverifiedShow Answer

Which of these works by inhibiting dopamine reuptake into synapses?

Correct AnswerverifiedShow Answer

If a neuron receives both excitatory and inhibitory signals, will an action potential be generated?

Correct AnswerverifiedC

_____ inhibits osteoclasts, and _____ stimulates them.

Correct AnswerverifiedShow 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

You are relaxing, having a snack and watching TV, when suddenly the entire house begins to shake violently. The activity of your _ quickly decreases, while that of your _ increases.

Correct Answer
verified

Correct Answer
verified
B

Correct Answer
verified

Long, myelinated nerve fibers are called _ in the PNS and _ in the CNS.

Correct Answer
verified

Correct Answer
verified
B

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
C

_ inhibits osteoclasts, and _ stimulates them.

Correct Answer
verified