Which of the Following Statements About What Happens During a Muscle

question 36

Multiple Choice

Which of the following statements about what happens during a muscle contraction is true?

• A)Actin and myosin filaments both shorten in length.
• B)Actin filaments shorten in length when myosin filaments bind to actin.
• C)Myosin filaments become attached to the Z disks in a sarcomere.
• D)Myosin filaments slide along actin filaments.

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Definitions:

Antagonist

In pharmacology, a substance that blocks or dampens the effects of a neurotransmitter or hormone. In literature, the character who opposes the protagonist.

Opiate

A category of drugs naturally derived from the opium poppy plant that are used for pain relief but are also highly addictive.

Childbirth

The process of giving birth to a baby, ranging from the onset of labor to the delivery of the child.

Endorphins

Natural, pain-relieving chemicals produced by the body that promote a sense of well-being and can diminish the perception of pain.