Enzymes which remove hydrogen atoms from their substrates are referred to as ________.
dehydrogenases
hydrolases
catalases
peroxidases
dehydrogenases
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One example of cardiac arrhythmia is ________, in which a rapid, repetitious movement of the ventricular muscle replaces normal contractions.
A. atrial fibrillation B. ventricular fibrillation C. atrial flutter D. premature ventricular contraction E. None of the choices is correct.
The cells responsible for humoral immunity are the ________ cells
A) NK B) B C) helper T D) cytotoxic T E) suppressor T
One of the major physiological factors that triggers thirst is ________
A) becoming overly agitated B) a rise in plasma osmolality C) drinking caffeinated beverages D) a dry mouth from high temperatures
The hormone responsible for initiating a male's sexual maturation and the appearance of secondary sex characteristics is
A) testosterone. B) ICSH. C) FSH. D) LH. E) gonadotropin.