Which of the following is NOT true of muscle fatigue?
A. It may be caused by conduction failure, due to accumulation of K+ ions in the transverse tubules of skeletal muscle fibers
B. It usually occurs when a muscle is being stimulated during very light work or exercise.
C. It may be caused by decreased responsiveness of a muscle fiber to low pH, resulting from a build-up of lactic acid
D. It involves a decrease in the force of muscle contraction, even when the muscle is still under stimulation.
E. All of these are true of muscle fatigue.
Answer: B
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The essential functions of the liver include all of the following except
A) metabolic regulation. B) hematological regulation. C) bile production. D) albumin production for blood osmotic pressure. E) hormonal regulation.
Label A represents which structure(s)?
A) myenteric plexus
B) mesenteric artery and vein
C) lymphatic vessel
D) submucosal plexus
E) mucosal gland
Which gas is most soluble in plasma?
a. carbon dioxide b. oxygen c. nitrogen d. all of these gases are equally soluble
The stirrup bone of the middle ear is also called the ____________________.?
Fill in the blank(s) with correct word