The endocrine system is a highly complex system of glands that secrete important hormones for a variety of body functions.
a. true
b. false
a. true
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The countercurrent multiplier is a system by which the
A. vasa recta secretes multiple amounts of metabolic wastes against their concentration gradient. B. nephron loop multiplies the concentration of salts in the interstitial fluid of the kidney medulla. C. vasa recta becomes more concentrated with nitrogenous wastes than the urine. D. nephron loop dilutes the concentration of solutes in the tubular fluid at its hairpin turn.
A 25-year-old male named Carlos went to the optometrist with the complaint of double vision (diplopia). The optometrist performed various eye tests on Carlos. Carlos was able to read an eye chart with each individual eye but experienced the double vision when he tried to use both eyes to focus. The optometrist noticed that when he had Carlos look laterally with each eye, Carlos's right eye did not move as far laterally as his left could. Based on these tests, the optometrist suspected that the muscle innervated by was not working properly.
a. CN II (optic) b. CN III (oculomotor) c. CN IV (trochlear) d. CV VI (abducens)
How many homologous chromosome pairs are present in most human cells?
A) 23 B) 4 C) 46 D) 18
List the arrangement of components found in a third-class lever
A. weight-fulcrum-pull B. fulcrum-pull-weight C. fulcrum-weight-pull