Which of the following white blood cells are mobile?
A) lymphocytes
B) neutrophils
C) monocytes
D) neutrophils and monocytes
E) basophils
D
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Which event typically occurs at the start of a cardiac cycle?
A) Ventricular blood pressure drops until reverse blood flow pushes the cusps of the semilunar valves together. B) Atrial contraction forces a small amount of blood into the relaxed ventricles. C) The semilunar valves open and blood is ejected. D) Ventricular contraction pushes the atrioventricular valves closed. E) The atrioventricular valves opens and the ventricles fill passively.
Susan slipped on the ice and was unable to be fully mobile for several days. What disruption to homeostasis would you predict she experienced during her immobile period in terms of her muscular system?
A. Susan's uninjured muscles overcompensate for the inactive ones by contracting spontaneously. B. Susan was more cold than usual because her inactivity prevented her muscles from helping to regulate her body temperature. C. Susan's metabolic rate was raised, and it initiated sweating.
The attachment of a muscle's tendon to the stationary bone is called the _____; the attachment of the muscle's other tendon to the movable bone is called the _____
a) origin, action b) insertion, action c) origin, insertion d) insertion, origin e) insertion, action
Which organelle modifies, sorts, and packages proteins and lipids for export from the cell?
A) endoplasmic reticulum B) Golgi apparatus C) mitochondrion D) cytoskeleton