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SHARP Exam 2 Questions with Correct Answers
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SHARP Exam 2 Questions with Correct Answers
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SHARP Exam 2 Questions with CorrectAnswers
nervous system - Answer-organ system consisting of the brain, spinal cord, and
associated nerves that coordinates the other organ systems of the body
central and peripheral - Answer-What are the two major divisions of the nervous
system?
brain and spinal cord - Answer-What are the parts of the central nervous system?
nerves - Answer-what is included in the peripheral nervous system?
somatic and autonomic - Answer-What are the two divisions of the peripheral nervous
system?
somatic nervous system - Answer-nerves that serve skin, skeletal muscle, and tendons
-voluntary control
autonomic nervous system - Answer-regulates activity of cardiac and smooth muscles,
organs, and glands
-involuntary control
sympathetic and parasympathetic - Answer-what are the two divisions of the autonomic
nervous system?
sympathetic nervous system - Answer-promotes activities associated with emergency
-fight or flight
parasympathetic nervous system - Answer-active under normal conditions
-rest and digest
receive sensory input, info. processing, generation of appropriate response - Answer-
what are the functions of the nervous system?
neurons and neuroglia - Answer-what are the 2 kinds of cells in nervous tissue?
neurons - Answer-nerve cells that transmit impulses
axon, cell body, dendrites - Answer-what are the 3 parts of a neuron?
sensory neuron, motor neuron, interneuron - Answer-what are the 3 kinds of neurons?
sensory neuron - Answer-sensory receptor (PNS to CNS)
, interneuron - Answer-entirely within CNS
motor neuron - Answer-CNS to PNS to effector (muscle fiber, organ, gland)
neuroglia - Answer-nonconducting nerve cells that support neurons
nerve signals - Answer-action potentials traveling along a neuron ; they convey info
action potential - Answer-a brief change in electrical conditions at a neuron's membrane
refractory period - Answer-portion of axon immediately following the action potential
sympathetic division - Answer-which subdivision of the autonomic nervous system is
responsible for fight or flight?
membrane potential - Answer-difference in electrical charges between 2 sides of a
membrane
resting membrane potential - Answer-polarized plasma membrane (-70mv)
negative ions inside cell
positive ions outside cell
sodium potassium pump - Answer-membrane protein
-uses ATP to pump 3 sodium out and 2 potassium in
depolarization - Answer-sodium gates open (-40mv)
Repolarization - Answer-potassium gates open (+30MV)
stimulus - Answer-activates neuron and begins action potential if threshold is met (-
40mv)
voltage gated channels - Answer-opens and closes in response to voltage changes
across membrane
ligand-gated channels - Answer-opens and closes when a specific chemical binds to it
(acetylcholine)
mechanically regulated gates - Answer-responds to physical distortions of the
membrane
synapse - Answer-the junction between neurons; nerve signal can not jump synaptic
cleft
neurotransmitters - Answer-chemicals responsible for transmission across a synapse
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