Muscle fiber fatigue results from ______.

A. calcium ion imbalances as ATP levels drop
B. insufficient acetylcholine
C. a perception by the individual that additional muscular work is not possible
D. insufficient stimulus of the muscle fiber at the neuromuscular junction


Ans: A. Calcium ion imbalances as ATP levels drop

Anatomy & Physiology

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Identify the structure labeled "4."

Anatomy & Physiology

Which of these blood values are in the normal range?

A. Venous PO2 = 100 mmHg B. Arterial PCO2 = 38 mmHg C. Venous PCO2 = 40 mmHg D. Arterial PO2 = 46 mmHg

Anatomy & Physiology

In general, the effects of natriuretic peptides are ________ to those of the renin-angiotensin system

A) synergistic B) antagonistic C) permissive D) additive E) integrative

Anatomy & Physiology

The number of erythrocytes in a milliliter sample of blood is the same as the number of leukocytes in a milliliter sample of blood

Indicate whether the statement is true or false.

Anatomy & Physiology