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Lostsunrise [7]
3 years ago
7

The force generated by a single muscle fiber can be increased by

Biology
1 answer:
Dominik [7]3 years ago
4 0

Answer:

A) increasing frequency of action potentials only.

Explanation:

If the muscle fibers begin the contraction with the sarcomere too elongated, the thick and thin filaments would be barely overlapping, forming few crossed bridges. On the contrary, if the sarcomere is too shortened so that the thick filaments reach the z-disks, the myosin is unable to find new fixation sites for cross-bridge formation and the tension decreases rapidly.

But to better understand how the contraction force increases, it should be noted that a single contraction does not represent the maximum force that a muscle fiber can develop. <u>The force generated by the contraction of a muscle fiber is increased, increasing the frequency with which the action potentials of the muscle stimulate said fiber,</u> that is to say that the nervous system controls part of this.

A potential muscular type action lasts between 1 and 3 ms. While muscle contraction can last 100 ms. If the repeated action potentials are separated by prolonged intervals of time, the muscle fiber has time to fully relax between the stimuli. If the action potentials continue to stimulate muscle fiber repeatedly at short intervals (high frequency), the relaxation between contractions decreases until the muscle fiber achieves a state of maximum contraction known as tetanus.

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What factor defines all groups in the Köppen system, with the exception of dry climates? evaporation precipitation air pressure
Liula [17]

Answer:

temperature

Explanation:

I choose temperature because it tells how hot,cold,dry and warm somethings are meanwhile evaporation is when water changes from liquid to gas,so that means water gets hot.

Precipitation is when water released from the cloud to form rain,freezing rain,sleet,snow,or hail.Which means thing get cold.

Air pressure also affect evaporation, which means that water will not be able to come up of the surface of a body of water.So that means the the pressure will be pushing down on the surface of the water.

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3 years ago
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7 0
3 years ago
Which question can be answered using the scientific process
ololo11 [35]
Question like "simply 10*1000000" that would be 10^6
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The salinity of ocean water is not the same everywhere in the ocean. Which of the following is a cause of these differences in s
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3 years ago
Consider the abbreviated model of meiosis and the four gametes produced at the completion of meiosis II. Imagine that these game
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The right answer is A) Trisomy

Aberrant karyotypes containing an abnormal number of chromosomes are known in the human species. The best-known (and most common) chromosomal abnormality is trisomy 21, which is responsible for Down syndrome (mongolism). There are others such as Turner syndrome (woman with a single X chromosome) or Klinefelter syndrome (man XXY).


These abnormalities originate from the non-disjunction of the chromosomes of a pair of homologues during metaphase I of meiosis. At the end of division I, a daughter cell contains the two chromosomes of the pair considered and the other cell does not contain a chromosome of this pair. A similar result can be obtained during a bad distribution of chromatids during anaphase II.


After fertilization from a gamete of this type, a trisomy or a monosomy is obtained.

4 0
3 years ago
Read 2 more answers
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