Regarding components of negative feedback in thermoregulation, what is the corresponding term for the skeletal muscles?
A) effector
B) control center
C) receptor
D) integrator
E) stimulus
A) effector
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Why does hair turn gray or white as people age?
A. Melanocytes die out. B. Mitosis slows down in the hair shaft. C. The shaft becomes rounder in cross-section. D. Keratin production decreases. E. Blood supply to the scalp diminishes.
What is the primary site on a neuron for receiving signals from other neurons?
A. The neurosomas B. The axon terminals C. The axon collaterals D. The dendrites E. The axons
Which of the following is NOT a function of the digestive system?
A. Movement of nutrients to the cells B. Elimination of indigestible wastes C. Absorption of nutrient molecules D. Ingestion of food
Which one of the following is NOT true of the constant (C) regions of antibodies?
A) The constant regions are the same or nearly the same on all antibodies of a given class. B) The constant regions form the "stem" of an antibody. C) The constant regions determine the specific type of antibody class formed. D) The constant regions form an antigen-binding site. E) The constant regions determine how an antibody class will carry out its immune role.