The functional units of a muscle cell are composed of what?

A. Sarcolemma
B. Sarcoplasmic reticulum
C. Myofibril
D. Sarcomere


Answer: C

Anatomy & Physiology

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HIV is spread through sexual intercourse, hypodermic needles and sneezing or coughing.

a. true b. false

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Which of these is not a property of the renal counter-current multiplier?

a) It is opposed by the vasa recta. b) It depends on active ion transport to function. c) It creates a hyperosmotic interstitial fluid in the kidney medulla. d) It exploits the structure of the nephron loop.

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The left atrium

A. receives oxygen-poor blood from the body tissues. B. receives oxygen-rich blood from the lungs. C. pumps oxygen-rich blood toward the body tissues. D. pumps oxygen-poor blood to the lungs.

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The papillae located mainly on the tip and sides of the tongue that contain only a few taste buds each are the ________ papillae.

A. papiform B. foliate C. filiform D. vallate E. fungiform

Anatomy & Physiology