MTSA Advanced Physiology Test 2 questions with answers

MTSA Advanced Physiology: |\ |\ |\




Test 2 questions with answers
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2 major divisions of the nervous system - CORRECT ANSWERS
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✔✔central and peripheral
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components of the central nervous system - CORRECT ANSWERS
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✔✔brain and spinal cord
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components of peripheral nervous system - CORRECT ANSWERS
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✔✔cranial nerves, spinal nerves, ganglia
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number of cranial nerves - CORRECT ANSWERS ✔✔12 pairs
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number of spinal nerves - CORRECT ANSWERS ✔✔31 pairs
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afferent - CORRECT ANSWERS ✔✔conveying toward a center
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afferent neurons - CORRECT ANSWERS ✔✔sensory neurons
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efferent - CORRECT ANSWERS ✔✔conveying away from the
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center


efferent neurons - CORRECT ANSWERS ✔✔motor neurons
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,divisions of the efferent nervous system - CORRECT ANSWERS
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✔✔somatic and autonomic |\ |\




divisions of autonomic nervous system - CORRECT ANSWERS
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✔✔sympathetic and parasympathetic |\ |\




enclosed and protected by boney structures - CORRECT
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ANSWERS ✔✔CNS (brain and spinal cord)
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somatic nervous system - CORRECT ANSWERS ✔✔the division of
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the peripheral nervous system that controls the body's skeletal
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muscles


pathway that has preganglionic and post ganglionic neurons -
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CORRECT ANSWERS ✔✔efferent autonomic
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Basic structural unit of the nervous system - CORRECT ANSWERS
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✔✔neuron


Dendrites - CORRECT ANSWERS ✔✔a neuron's branching
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extensions that receive messages and conduct impulses TOWARD
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the cell body
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how many dendrites - CORRECT ANSWERS ✔✔0, 1, or many
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,interesting fact about dendrites and conduction - CORRECT
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ANSWERS ✔✔they have very few voltage gated Na+ channels
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and, thus, are poor conductors of action potentials
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how dendrites conduct impulses - CORRECT ANSWERS
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✔✔electrotonic conduction |\




electrotonic conduction is.. - CORRECT ANSWERS ✔✔conduction
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directly through the cytoplasm.
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-allowed by cytoplasm highly concentrated with electrolytes
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-conducts toward the axon hillock |\ |\ |\ |\




-FAST d/t increase electrolytes and increased size = less
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resistance to flow. |\ |\




where voltage gated Na+ channels open in a neuron - CORRECT
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ANSWERS ✔✔in the axon hillock (if the receiving impulses are
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enough to raise RMP to threshold)
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features of the soma of a neuron - CORRECT ANSWERS ✔✔-large
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diameter
-large nucleus |\




-large nucleolus
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-nisal bodies (modified ER)
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-large golgi apparatus
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-LOTs of ribosomes
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-LOTs of mitochondria
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, major function of a neuron (based on organelles) - CORRECT
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ANSWERS ✔✔protein synthesis (making neurotransmitters)
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How many axons does a neuron have? - CORRECT ANSWERS
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✔✔only one (but may have collaterals)
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Schwann cells - CORRECT ANSWERS ✔✔produce myelin sheath in
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PNS
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The gaps between Schwann cells found at regular intervals in
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peripheral system neurons are called ________. - CORRECT
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ANSWERS ✔✔Nodes of Ranvier |\ |\ |\




favors one way transmission of impulses in neurons - CORRECT
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ANSWERS ✔✔few VG Na+ channels in the soma with many in the
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axon.
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three types of neurons - CORRECT ANSWERS ✔✔multipolar,
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bipolar, unipolar/pseudounipolar
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Multipolar neurons have - CORRECT ANSWERS ✔✔multiple
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dendrites and one axon |\ |\ |\




where multipolar neurons are found - CORRECT ANSWERS
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✔✔brain, spinal cord, and somatic motor fibers
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