In Muscle Contraction, the Breaking of the Cross-Bridge Between Actin

question 47

Multiple Choice

In muscle contraction, the breaking of the cross-bridge between actin and myosin is caused by ____.

• A)hydrolysis of ATP into ADP plus Pi
• B)formation of ATP from ADP and Pi
• C)release of Pi from the myosin head
• D)binding of a new ATP to the myosin head
• E)return of myosin to a high-energy state

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Definitions:

Aggression

Actions aimed at causing physical or mental damage to another person.

Frustration-Aggression Hypothesis

A psychological theory proposing that aggression is often a result of frustration caused by blocked goals.

Excitation-Transfer Model

The expression of aggression is a function of learnt behaviour, some excitation from another source, and the person’s interpretation of the arousal state.

Arousal

A psychological and physiological state of being awake and reactive to stimuli.