Which of These Statements Correctly Describes Why You Are Able

question 34

Multiple Choice

Which of these statements correctly describes why you are able to repeatedly contract and relax your muscles of respiration, allowing you to breathe in and breathe out?

• A)As soon as all the Ca²⁺ stored in the lateral sacs of the sarcoplasmic reticulum is used up, muscle relaxation occurs.
• B)After the muscle cells become excited, acetylcholinesterase maintains the action of acetylcholine.
• C) When there is no longer a local action potential in the muscle cell, Ca²⁺ is actively transported back into the lateral sacs of the sarcoplasmic reticulum.
• D) ATP is not available soon after the contraction.

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Definitions:

Primary Alcohol

An alcohol containing a hydroxyl group attached to a carbon with two hydrogens, indicating a primary carbon.

Aldehyde

An organic compound containing a carbonyl group (C=O) bonded to at least one hydrogen atom, with the general formula R-CHO.

Synthetic Steps

The individual stages or reactions conducted in the laboratory to synthesize a desired chemical compound.

Reaction Product

The substance(s) formed as a result of a chemical reaction between reactants.