In skeletal muscle and many other cell types, mitochondria exist separately

a. True
b. False
Indicate whether the statement is true or false


False

Anatomy & Physiology

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A group of rats are bred in a laboratory to study muscle function. This group possesses a genetic defect that causes the myosin heads to bind ADP irreversibly. The rats are entirely paralyzed. Which of the following correctly explains the impact of the defect on the muscle?

A. Because ADP is permanently bound, the myosin heads can never bind to the actin binding sites of the thin filament. B. ATP won't bind to the myosin heads, preventing the actin binding site of the thick filament from being revealed. C. ATP won't bind to the myosin heads, causing the thin filament to be constantly pulled in the power stroke of contraction. D. Because ADP is permanently bound, the myosin heads will be irreversibly cross-bridged with the actin binding sites of the thin filament.

Anatomy & Physiology

The left and right bronchi form as the trachea splits in an area called the ________.

Fill in the blank(s) with the appropriate word(s).

Anatomy & Physiology

Under normal conditions, the total solute concentration of the plasma and the interstitial fluid is approximately 300 mOsm.

a. true b. false

Anatomy & Physiology

Blood returning from the systemic circulation enters the right atrium via two large veins, the __________, one returning blood from above and the other returning blood from below heart level

Fill in the blank(s) with correct word

Anatomy & Physiology