In a Laboratory Experiment You Have Treated a Muscle Cell

question 64

Multiple Choice

In a laboratory experiment you have treated a muscle cell with a calcium channel blocker.The membrane still depolarizes,but the concentration of calcium never increases in the cytosol.Which of the following describes what will happen next?

• A)Only one cross-bridge cycle will occur but no second cycle. 
• B)Binding of myosin to actin will take place.
• C)Tropomyosin will continue to cover the myosin binding sites on actin and no cross-bridges will form.
• D)A single twitch in skeletal muscle but no sustained contraction.
• E)Contraction will occur,but the muscle will be stuck in the contracted state and unable to relax.

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Definitions:

Trait Approach

A perspective in psychology focused on identifying, describing, and measuring individual characteristics and differences in personality.

Personality

A unique set of emotional, thoughts, and behavioral patterns that define an individual.

Collective Unconscious

A concept in Jungian psychology referring to the part of the unconscious mind that is derived from ancestral memory and experience, shared among beings of the same species.

Jung

A Swiss psychiatrist and psychoanalyst who founded analytical psychology, known for his work on the collective unconscious and archetypes.