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PHSL 1010 Final Exam Questions And 100% Correct Answers (A+)
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PHSL 1010 Final Exam Questions And 100% Correct Answers (A+)...
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PHSL 1010 Final Exam Questions And 100%Correct Answers (A+)
Voltage-gated Na+ channel
Complex that allows Na+ ions into a stimulated axon
Positive feedback loop
A feedback that causes potentiation of a response
Axon hillock
The site on a neuron where the action potential is generated
Resting potential
A state when the cell membrane is polarized
Active transport mechanism that re-establishes resting membrane potential
Acetylcholine
Neurotransmitter released by preganglionic parasympathetic neurons and
preganglionic neurons of the sympathetic nervous system
Depolarization
Change in membrane potential in response to a stimulus in the soma
Graded potential
Potential that decreases over distance
Schwann cell
Myelinating cell of the PNS
Repolarization
Return to resting potential after being depolarized
Gap junctions
, Bridges or electrical conduits that connect adjacent cells
Desmosomes
Anchoring junctions between adjacent cells
Absolute refractory period
Time when a new action potential cannot occur
Active transport
Substance crosses a membrane against concentration gradient
Na+K+ ATP-ase pump
Maintains electrochemical gradient across cell membrane
Goblet cell
Single secretory cell producing mucous
Symport
Co-transport in the same direction across a membrane
Astrocyte
Provides support and nutrients to neurons in the CNS
Disease
Result of a breakdown in homeostasis
Na+ leak channel
Allows passive movement of Na+ ions across membrane
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