Selectively permeable membranes allow proteins to pass through them
a. true
b. false
Ans: b. false
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Which of the following describes a body process that is controlled using a positive feedback loop?
a) increasing body temperature in response to a drop in body temperature b) decreasing body temperature in response to elevated body temperature c) decreasing blood [glucose] in response to elevated blood [glucose] d) increasing strength of uterine contractions in response to cervical stretch e) decreasing heart rate in response to elevated blood pressure
Which part of the brain exerts the most control over the autonomic nervous system?
A. The cerebral cortex B. The midbrain C. The hypothalamus D. The thalamus E. The medulla oblongata
Which carries blood from the liver to the inferior vena cava?
A. Inferior mesenteric vein B. Hepatic portal vein C. Splenic vein D. Hepatic veins E. Superior mesenteric vein
What occurs when the head is in the normal, upright position?
a. Receptor output increases. b. The otoliths are shifted to the side. c. The otoliths push the hair cell processes down. d. Otoliths distort the hair cell processes.