Explain how the skin helps regulate body temperature
What will be an ideal response?
The nervous system is responsible for controlling all temperature-regulating functions of the skin. When the temperature in the external environment is high, heat loss occurs as the nervous system activates sweat glands. Perspiration is produced, which evaporates from the skin surface, causing heat to be dissipated. At the same time, the nervous system causes blood to be flushed into skin capillary beds so that heat radiates from the body surface. In contrast, when the temperature in the external environment is low, the nervous system prevents blood from entering the skin capillary system and radiation to the body exterior is prevented so that perspiration does not occur.
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The thin membrane surrounding the heart is:
A) cardiomegaly B) pericardium C) endocardium D) exocardium E) hypocardium
Which of the following is the most important stimulus for contraction of the gallbladder?
a. CCK causes contraction of the gallbladder. b. mechanical contraction of the small intestine causes bile to be forced out of the gallbladder. c. sympathetic stimulation causes contraction of the gallbladder. d. an increase in bile secretion by the liver causes contraction of the gallbladder. e. bile salts cause contraction of the gallbladder.
At the knee, the small saphenous, tibial, and fibular veins unite to form the ________ vein
A) femoral B) popliteal C) external iliac D) internal iliac E) inferior vena cava
A rupture, or bursting, of the red blood cell is called hemolysis.?
Indicate whether the statement is true or false