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Exam (elaborations)

PHSL 1010 Final Exam Questions And 100% Correct Answers (A+)

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  • PHSL 1010
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PHSL 1010 Final Exam Questions And 100% Correct Answers (A+)...

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  • November 5, 2024
  • 9
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • PHSL 1010
  • PHSL 1010
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Easton
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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