Dynamic constancy is a term used to describe homeostasis. Which of the following is NOT an example of dynamic constancy?
A. The pancreas releasing insulin when blood glucose levels are significantly elevated
B. Adjusting the depth and rate of breathing if blood pH levels change
C. Administering IV fluids to a person who presents to the emergency room with dehydration
D. Sweating or shivering as you move from inside air-conditioned stores to outside on a hot, humid day
Answer: A
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Regarding fertilization, which of the following events happens first?
A. Formation of a fertilization membrane B. The fast block to polyspermy C. The slow block to polyspermy D. The cortical reaction E. The acrosomal reaction
You conduct an experiment on twenty 18-year-old male subjects to see how various levels of exercise influence heart rate. Explain why only 18 -year-old males were used as subjects.
What will be an ideal response?
During the cardiac cycle,
A) the P wave of the ECG occurs between the first and second heart sounds. B) the QRS complex of the ECG precedes the increase in ventricular pressure. C) the second heart sound coincides with the QRS complex of the ECG. D) the third heart sound occurs during atrial systole. E) the greatest increase in ventricular pressure occurs during the ejection phase.
Which parts of the nervous system work together to provide much of the body's homeostasis?
A. Diencephalon and basal nuclei B. Hypothalamus and brainstem C. Cerebrum and midbrain D. Hippocampus and thalamus