What is a graded potential?

Exam 4 Waziry

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Science
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University
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Hard
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1.
FLASHCARD QUESTION
Front
Back
A graded potential is a change in membrane potential that varies in size, as opposed to being all-or-nothing. It decays over distance and is typically found in dendrites and cell bodies.
2.
FLASHCARD QUESTION
Front
What is smooth muscle tone?
Back
Smooth muscle tone refers to the ability of smooth muscle to maintain a prolonged contraction without fatigue, allowing for sustained tension in the walls of hollow organs.
3.
FLASHCARD QUESTION
Front
What is the function of somatic sensory fibers?
Back
Somatic sensory fibers convey sensory information from the skin, muscles, and joints to the central nervous system (CNS), allowing for the perception of touch, pain, and proprioception.
4.
FLASHCARD QUESTION
Front
What role do external intercostal muscles play in respiration?
Back
External intercostal muscles assist in breathing by elevating the rib cage, which increases the volume of the thoracic cavity and facilitates inhalation.
5.
FLASHCARD QUESTION
Front
Where is smooth muscle primarily located in the body?
Back
Smooth muscle is primarily found in the walls of hollow organs, such as the intestines, blood vessels, and bladder.
6.
FLASHCARD QUESTION
Front
What is the difference between graded potential and action potential?
Back
Graded potentials are variable in magnitude and decay over distance, while action potentials are all-or-nothing events that propagate without decrement along the axon.
7.
FLASHCARD QUESTION
Front
What is the role of mitochondria in muscle cells?
Back
Mitochondria provide the energy required for muscle contraction through aerobic respiration, especially in muscles that require sustained activity.
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