Which is TRUE regarding the regulation of heart rate?

A. Stimulation of parasympathetic nerves to the heart causes a slowing of heart rate.
B. Stimulation of sympathetic nerves to the heart causes an increase in heart rate.
C. A person whose heart lacks autonomic innervation has a faster heart rate at rest than a person with a normally innervated heart.
D. The slope of diastolic depolarization in SA node cell action potentials determines the heart rate.
E. All of the choices are true.


E

Anatomy & Physiology

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The inability to control the expulsion of urine is called ________.

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

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In the lungs, surfactant is secreted by ____ cells.?

a. beta b. parietal c. alveolar d. alpha

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Which of the following promotes the depolarization stage?

A) hydrolysis of ATP B) closure of voltage-gated sodium ion channels C) opening of voltage-gated sodium ion channels and sodium ions enter the cell D) opening of voltage-gated potassium ion channels and potassium ions exit the cell

Anatomy & Physiology

Flexion and extension usually occur along which plane?

a) Frontal b) Transverse c) Sagittal d) Oblique e) None of these choices

Anatomy & Physiology