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chapter 11 study questions

Terms in this set (14)

The nervous system has three overlapping functions. Which of the following represents a logical sequence of these three functions?
A) sensory input, motor output, integration
B) motor output, integration, sensory input
C) sensory input. integration, motor output
D) integration, sensory input, motor output
C) sensory input, integration, motor output
while studying for an exam, you reach for a beverage. to extend your arm, your _______ nervous system is activated
A) afferent
B) autonomic
C) sympathetic
D) somatic
D) somatic
the door slams shut loudly and you flinch. after a few seconds, you realize that your heart is beating very rapidly and forcefully. this response is the result of your ______ nervous system
A) afferent
B) autonomic
C) central
D) somatic
B) autonomic
Complete the following analogy: electrical wire is to electrical insulating tape as peripheral neurons are to ______.
A) schwann cells
B) oligodendrocytes
C) astrocytes
D) ependymal cells
A) schwann cells
each neuron in our bodies has a life span of ______.
A) 120 days
B) 10 years
C) 10 months
D) an average human life span
D) an average human life span
the portion of an axon that communicates with its target cell is the ______.
A) dendrite
B) axon
C) axon terminal
D) cell body
C) axon terminal
the basis for differentiation between gray matter and white matter in the CNS is the presence of ______ in white matter.
A) unmyelinated fibers
B) myelinated fibers
C) schwann cells
D) ependymal cells
B) myelinated fibers
______ are the most common structural type of neuron in humans.
A) pseudounipolar
B) unipolar
C) bipolar
D) mulitpolar
D) multipolar
when considering the relationship between a structural classification and a functional classification of neurons, it can be said that ______.
A) all multipolar neurons are interneurons
B) all motor neurons are unipolar neurons
C) essentially all bipolar neurons are sensory neurons
D) unipolar neurons only function as motor neurons
C) essentially all bipolar neurons are sensory neurons
sodium ion concentration in the cytoplasm of a neuron ______ when its voltage-gates sodium channels open.
A) increases
B) decreases
C) remains unchanged
D) decreases tenfold
A) increases
depolarization of the neuron refers to:
A) a reduction in membrane potential
B) an increase in membrane potential
C) an increase negativity of the neuron interior
D) both b and c
A) a reduction in membrane potential
neurons generally repolarize once the membrane potential reaches approximately +30mV because:
A) voltage-gated sodium channel gates close
B) voltage-gated potassium channel gates open
C) chemically gated sodium channels open
D) voltage-gated calcium channel gates open
B) voltage-gated potassium channel gates open
the junction at which a neuron interacts with its target cell (either another neuron or a muscle cell, etc.) is called the ______.
A) synapse
B) junction
C) connection
D) axoaxonic target
A) synapse
neurotransmitters are important in the functioning of ______ synapses.
A) chemical
B) electrical
C) gap
D) converging
A) chemical
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