How much blood is pumped from each ventricle during the ventricular ejection phase?
A) 70 ml B) 90 ml C) 50 ml D) 120 ml
Answer: A
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The cardiovascular system is made up of ________, ________, and ________.
Fill in the blank(s) with the appropriate word(s).
Gastritis, peptic ulcers, and gastric cancer can all be caused by
A. increased secretion of gastric bicarbonate. B. increased mucus production by the neck cells. C. Helicobacter pylori, a bacterium. D. pH of the stomach contents continuously greater than 4. E. None of the choices are correct.
Myasthenia gravis is a(n) ____________________ condition in which the body erroneously produces antibodies against its motor end-plate ____________________ receptor-channels
Fill in the blank(s) with correct word
Which statement is incorrect about a chemical buffer?
a. It consists of a pair of substances involved in a reversible reaction, one that can yield free H+ and one that can bind with free H+. b. It minimizes changes in the pH of a solution when an acid or base is added to or removed from the solution. c. It responds to pH changes in about three minutes, but then can be very effective in preventing dramatic pH changes. d. It cannot actually remove hydrogen ions from the body. e. It acts according to the law of mass action.