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Klio2033 [76]
4 years ago
15

Why is a stimulus required for a muscle to contract?

Biology
1 answer:
Charra [1.4K]4 years ago
7 0
When an individual muscle fiber receives a threshold stimulus, it contracts as much as possible. ... a threshold stimulus is the minimum amount of energy needed to make a muscle fiber contract.
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Explain why the answer is right please
OLEGan [10]
F. Cohesive behavior.


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Identify the inputs and outputs of the muscular<br> system
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3 years ago
Plant hormones act by directly affecting the activities of _____. genes enzymes signal transduction pathways genes and enzymes m
Readme [11.4K]

Answer:

Signal transduction pathways

Explanation:

Plant hormones act by directly affecting the activities of signal transduction pathways.

Signal transduction pathways are involved in the transfer of signals from outside of the cell to the inside of the cell for the regulation of various cellular activities. For this, the extracellular signalling molecules bind to the receptors that are located on the cell membrane. After their binding due to some change in the receptor molecule, a signal is triggered in to the cell and thus information from outside of the cell is transferred to the inside of the cell through these transduction pathways.

Plant hormones affect these pathways and as a result membranes, enzymes, and genes are also influenced by the plant hormones.

8 0
3 years ago
A(n) resistance is an unusually high occurrence of a disease in a certain place during a certain time period.
prohojiy [21]

The correct answer is False. The correct word is Epidemic and not resistance. 
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3 years ago
What happens to the z lines after contraction of the sarcomere?
ELEN [110]

Answer:

They became closer to each other.

Explanation:

When skeletal muscles contracts the Z lines that are at the end of every sarcomere became closer to each other due to the fact that the I bands that are attached to the Z lines and contains the myosin filaments move closer to each other interacting with the actin filaments and shorten the the H zone that is in the middle of the sarcomere. In other words, It all becomes compact during a contraction.

8 0
3 years ago
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