Which of the Following Statements About the Microscopic Anatomy of Skeletal

question 108

Multiple Choice

Which of the following statements about the microscopic anatomy of skeletal muscle fibers is false?

• A)Tubular extensions of the sarcolemma penetrate the fiber transversely.
• B)Cross striations result from the lateral alignment of thick and thin filaments.
• C)Each fiber has many nuclei to ensure adequate muscle protein production.
• D)The net-like sarcoplasmic reticulum surrounds each myofilament.
• E)All of the answers are true; there are no false answers.

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Definitions:

Primary Reinforcer

A stimulus that is inherently reinforcing, typically satisfying a physiological need; an example is food.

Secondary Reinforcer

A stimulus that has acquired reinforcing properties through association with other reinforcers.

Classical Conditioning

A learning process that occurs when two stimuli are repeatedly paired; a response that is at first elicited by the second stimulus is eventually elicited by the first stimulus alone.

Conditioned Stimulus

A previously neutral stimulus that, after being paired with an unconditioned stimulus, elicits a conditioned response in classical conditioning.