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2 years ago

What role does calcium play in this regulation, and where is it stored in a muscle fiber?

Biology

1 answer:

LekaFEV [45]2 years ago

6 0

Answer:

Calcium's positive molecule is important to the transmission of nerve impulses to the muscle fiber via its neurotransmitter triggering release at the junction between the nerves. Inside the muscle, calcium facilitates the interaction between actin and myosin during contractions.

Explanation:

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3 years ago

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9514 1404 393

Answer:

17. 7.61×10³ N

18. 9.51 m/s²

19. maybe you want 29.375 N

Explanation:

17. Use the given formula for force. Fill in the masses and radius. The distance from the earth is in addition to the radius of the earth.

$F=G\dfrac{m_1m_2}{r^2}\\\\F=(6.67\times10^{-11})\dfrac{5.97\times10^{24}\cdot 800}{((6.37+0.10)\times10^6)^2}=\dfrac{6.67\cdot5.97\cdot8.00}{6.47^2}\times10^3\\\\F=7.61\times10^3\qquad\text{newtons}$

18. Make use of the relation ...

F = ma

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19. The acceleration of the runner is ...

a = ∆v/∆t = (9 m/s - 4 m/s)/(8 s) = (5/8) m/s²

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3 years ago