Explain how the hypothalamus regulates body temperature when a person is exposed to warm conditions
What will be an ideal response?
The hypothalamus functions as the control center in this homeostatic control system. In a warm environment, thermoreceptors on the skin detect heat and activate nerve cells that send the message to the hypothalamus. The hypothalamus sends nerve impulses to the sweat glands (effectors), prompting them to increase their activity. Once sweat evaporates, the body cools, and signals from the brain to the sweat glands cease.
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The LEAST hydrophilic substance is
A. salt. B. an ion. C. oil. D. an amphipathic molecule. E. a gas.
All functions in the sponge (gas exchange, circulation, and excretion) are performed by diffusion except which of the following?
a. sensory function b. glandular secretion c. digestion d. camouflage
Flagellated cells can
A) attach to surfaces more effectively because of the flagella. B) move the cell through fluid. C) move internal organelles more efficiently than nonflagellated cells. D) divide more quickly than nonflagellated cells.
What is the role of the urethra?
a) to transport urine out of the body b) to transport the egg to the uterus c) to connect the kidneys to the bladder d) to connect the uterus to the outside of the body