During exercise the most important control mechanism to increase cardiac output is:

increased body temperature
increased sympathetic activity to the ventricles
increased epinephrine from the adrenal medulla
increased end-systolic volume
all of the choices are correct


increased sympathetic activity to the ventricles

Anatomy & Physiology

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A patient goes to her doctor, complaining of fatigue, weight gain, and intolerance to cold. She also has a noticeable goiter in her neck. Which of the following is a most likely diagnosis and cause?

A. She has hyperthyroidism, possibly due to a hypersecreting tumor of the anterior pituitary gland. B. She has hypothyroidism, possibly due to low iodine in her diet. C. She has hypothyroidism, possibly due to destruction of thyrotrope cells of her anterior pituitary gland. D. She has hyperthyroidism, possibly due to Graves' disease.

Anatomy & Physiology

Respiratory __________ is the result of abnormal CO2 retention arising from hypoventilation

Fill in the blank(s) with correct word

Anatomy & Physiology

All of the following are the signs and symptoms of local inflammation, except

A. redness. B. edema. C. heat. D. pain. E. hemorrhage.

Anatomy & Physiology

An accumulation of ________ and lack of ATP appear to cause cramping and fatigue in muscles.

A. oxygen B. lactic acid C. carbon dioxide D. pyruvic acid

Anatomy & Physiology