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spayn [35]
2 years ago
3

What role (function) does calcium have within a muscle fiber?

Biology
1 answer:
Papessa [141]2 years ago
5 0
Answer:

Calcium triggers contraction by reaction with regulatory proteins that in the absence of calcium prevent interaction of actin and myosin.

Explanation:
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How are epimysium, perimysium, and endomysium interrelated? group of answer choices'
My name is Ann [436]

Entire muscles are encased in the epimysium. The perimysium, which is connected to the epimysium, separates groups of muscle fibres into fasciculi. Individual muscle fibres are encircled by a delicate network of connective tissue fibres, blood arteries, lymphatic vessels, and nerves called the endomysium.

The collagen fibres of tendons are made of endomysium, perimysium, and epimysium, and they serve as the tissue link between muscles and bones by indirect attachment. Intermittent perimysial junction plates serve as its connection to the perimysium.

The perimysium, which surrounds bundles of muscle fibres, the endomysium, which surrounds individual muscle fibres, and the epimysium, which surrounds the muscle, are the three scale levels at which connective tissue of the muscle may be identified.

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2 years ago
Explain character displacement, and provide an example.
nata0808 [166]

A line of indirect evidence of competition comes from the comparison between closely related species, whose population can be allopatric (geographically separated) or sympatric (geographically superimposed). In some cases, the allopatric populations of these species are morphologically similar and use similar resources. On the other hand, sympatric population, which are supposed to compete for resources, have body structures and use different resources. The displacement of characters is the tendency to have more divergent characteristics in sympatric populations of two species than in allopatric populations of the same two species.

An example of character displacement is the variation in size between populations of galapagos finches. Some of its populations are allopatric ( they live separately) and others are sympatric ( they live together). Peak size distributions they vary according to whether they are sympatric or allopatric.  They look more alike when they are allopathic than when they are sympatric. That is, the peak size character moves when species enter competition.

6 0
4 years ago
:-) :-) :-) :-) :-) :-) :-) :-) :-) :-)
bogdanovich [222]

Answer:

Can you put a more clear picture of it or tell me what is says it is hard to read?

Explanation:

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6 0
3 years ago
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Which example is not the proper use of a casting of a toolmark?
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<span>B. comparing directly to a suspect tool</span>
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3 years ago
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IrinaK [193]

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The total amount of carbon is constant but limited as it moves through the carbon cycle.

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