The only energy source that can be used directly by the contractile machinery of a muscle fiber is ____________________

Fill in the blank(s) with correct word


ATP

Anatomy & Physiology

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When NAD+ becomes NADH, it is being

A.  reduced and gaining chemical energy. B.  reduced and releasing chemical energy. C.  oxidized and gaining chemical energy. D.  oxidized and releasing chemical energy.

Anatomy & Physiology

Short reflexes of the digestive system are integrated in the ________.

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

Anatomy & Physiology

The normal sequence of structures activated for signal transmission and response in the body is

a. effector--afferent neuron--interneuron--efferent neuron-receptor. b. effector--efferent neuron--interneuron--afferent neuron-receptor. c. receptor--afferent neuron--interneuron--efferent neuron-effector. d. receptor--efferent neuron--interneuron--afferent neuron-effector.

Anatomy & Physiology

Oxygen in the lung:

a. is actively transported out of the lung b. converts hemoglobin to oxyhemoglobin c. converts oxyhemoglobin to hemoglobin d. both A and B above

Anatomy & Physiology