Cofactors such as NADH are found in all cells of the body and are often recycled. Such cofactors are categorized as __________ vitamins
A. essential
B. nonessential
B
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The total refractory period of cardiac muscle _____
A) is about the same as the total refractory period for skeletal muscle B) is shorter than the total refractory period for skeletal muscle C) is longer than the contraction of cardiac muscle D) is longer than the total refractory period for skeletal muscle
The otolithic membrane plays a role in the detection of:
A) startle reflex. B) linear acceleration and head tilting. C) rotational head movements. D) hearing.
Which structure prevents the heart valves from opening the wrong way?
a. trabeculae carne b. chordae tendineae c. pectinate muscles d. fossa ovalis
Which of the following hormones promotes sodium ion (and water) reabsorption by the kidney in order to increase blood pressure and blood volume?
A) glucagon B) thyroxine C) epinephrine D) aldosterone E) antidiuretic hormone