Which of These Statements Describes Why You Are Able to Repeatedly

question 124

Multiple Choice

Which of these statements 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:

Chitin-Reinforced Bristles

Stiff bristles made stronger with the natural polymer chitin, commonly found in the exoskeletons of arthropods.

Chitin-Hardened Tentacles

Tentacles strengthened by chitin, a polysaccharide found in the exoskeletons of arthropods and cell walls of fungi.

Capture Prey

The act or process by which an organism secures another organism for food.

Bilateral Symmetry

Having paired structures so the right and left halves of an object are mirror images.