Answer:
The first sentence is true and the second one is false.
Explanation:
The first sentence is the correct definition of a muscle twitch, but the second sentence is not because a twitch doesn't generate max tension in a whole muscle. A twitch is a short contraction that may be repeated but with no pain presence even though they can cause discomfort.
A single stimulus can produce a twitch in a skeletal muscle, but one twitch does not produce significant muscular activity or generate maximum tension in a human body's muscle. Instead, frequent, intense impulses from many motor neurons and rate at which these impulses are fired affect the tension produced by a muscle. Therefore, multiple stimuli overlapping cumulatively create stronger contractions.
The statements that one brief stimulus of a skeletal muscle results in a twitch and a twitch can generate maximum tension in a muscle are only partially correct. A single stimulus can indeed result in a twitch, an isolated contraction event. However, one twitch typically does not produce significant muscular activity or generate maximum tension in a whole muscle of a living organism.
Normal muscle contraction is sustained, producing a graded muscle response. This involves action potentials, or nerve impulses, that can vary in frequency and intensity, affecting the tension produced in the skeletal muscle. To generate substantial work, a muscle requires a series of these action potentials to induce muscle fibers to contract.
The amount of tension produced by a muscle depends not only on the frequency of action potentials, but also on the number of motor neurons transmitting these impulses and the rate at which a motor neuron fires these impulses. Summation occurs when multiple stimuli cumulate to create a stronger contraction. Therefore, if a muscle is stimulated while a previous twitch is still ongoing, subsequent twitches can generate a stronger response, resulting in greater muscle tension and power.
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Answer:
Because they believed the Congress had no right to prohibit slavery in the southern territories.
enlightened one
savior of the Islamic faith
leader of the Zulus User: What African nation remained independent of European rule?
Sudan
Ethiopia
South Africa
Algeria
Answer: Pluto didn't meet the three criteria the IAU uses to define a full-sized planet
b. ecosystem.
c. plant succession.
d. photosynthesis