Answer:
The correct answer will be option-D.
Explanation:
Calcium plays an important role in muscle contraction as they are released from the sarcoplasmic reticulum after they receive electric impulse.
Calcium triggers the muscle contraction cycle as these calcium ions bind to the troponin-tropomyosin complex. This binding exposes the myosin-binding site on the actin on which high energy myosin binds and cross-bridge is formed.
This cross-bridge formation causes the contraction of the sarcomere and therefore muscle contracts.
Thus, option-D is the correct answer.
Because as humans grow bigger, so does there brain. So the smaller you are, the smaller your brain.
Hope this helped!
-Edge
The breakup of the supercontinent of Rodinia created new mountains and land surface for new organisms to live on.
<h3>What are supercontinents?</h3>
Supercontinents are large continents which are composed of other continental blocks of the earth.
One of the supercontinents was Supercontinent Rodinia.
The breakup of the supercontinent of Rodinia created new mountains providing a land surface for organisms crawling out of the sea to live on.
In conclusion, supercontinents are composed of fused continental blocks.
Learn more about supercontinents at: brainly.com/question/18115864
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