Than the test group would be the control variable of the experiment
Answer:
a. Calcium is an electrolyte that assists in the transmission of nerve impulses.
Explanation:
In the process of muscle contraction, the action potential (electrical impulse) releases the calcium stored in the sarcoplasmic reticulum located in the muscle.
Calcium then flows into the cytoplasm, where the actin and myosin filaments are located, which will interact with each other to promote muscle contraction.
Thus, it can be concluded that calcium does play an important role in nerve impulse transmission.
Given the above statements, it is concluded that the correct alternative is "A"
.
As for the other statements: Calcium, as described above, also participates in the process of muscle contraction, however it is the muscle cells that contract, not the nerve cells (Statement B).
In addition, calcium does not participate in the formation of muscle cells (Statement C), nor can it make the blood slightly acidic (Statement D) because it has alkaline (basic) character.
Answer:
The picture is very blurry but all I can tell you is that there were 5 major extinctions in Earth's history and here are all five of them
Ordovician-Silurian Extinction: 440 million years ago.
Devonian Extinction: 365 million years ago.
Permian-Triassic Extinction: 250 million years ago.
Triassic-Jurassic Extinction: 210 million years ago.
Cretaceous-tertiary Extinction: 65 Million Years Ago.
Explanation:
See above.
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Answer:
Endocrine glands make chemicals called hormones and pass them straight into the bloodstream. Hormones can be thought of as chemical messages. From the blood stream, the hormones communicate with the body by heading towards their target cell to bring about a particular change or effect to that cell
Mass and distance affect the gravitational force.
