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
Answer: B
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There are four basic layers of the digestive tract. Arrange them in order from the lumen (deep to superficial)
A) serosa, mucosa, submucosa, and muscularis externa B) muscularis externa, serosa, mucosa, and submucosa C) mucosa, submucosa, muscularis externa, and serosa D) submucosa, serosa, muscularis externa, and mucosa
The ______ completely surrounds the male urethra.
A) Seminal vesicles B) Ejaculatory ducts c) Epididymae D) Bulbourethrals E) Prostate
Fluid found in lymphatic vessels is known as:
A) intracellular fluid. B) plasma. C) interstitial fluid. D) lymph.
Scuba divers breathe a nitrogen-oxygen mixture rather than pure compressed oxygen in order to avoid what condition?
A. The bends B. Oxygen toxicity C. Rapture of the deep D. Hypoxemic hypoxia E. Caisson disease