Melanocytes synthesize melanin, which protects underlying cells from the effects of
ultraviolet light.
Indicate whether the statement is true or false
TRUE
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The exchange of oxygen and carbon dioxide between the blood and cells throughout the body is called:
a. cellular respiration b. internal respiration c. external respiration d. breathing
If stroke volume is 80 ml and the heart rate is 70 beats per minute, the cardiac output is
a. 150 l/min b. 560 ml/min c. 5,600 ml/min d. 8,700 ml/min e. none of these answers.
The heart and blood vessels are the primary organs of the ________ system
A) lymphatic B) integumentary C) cardiovascular D) muscular
Consider the reaction: H2CO3 CO2 + H2O + 4 kcal/mol. Which of the following is TRUE?
A. The reaction is anabolic and the energy content of the reactant is greater than that of the products. B. The reaction is catabolic and the energy content of the reactant is greater than that of the products. C. The reaction is anabolic and the energy content of the products is greater than that of the reactant. D. The reaction is catabolic and the energy content of the products is greater than that of the reactant. E. The reaction is catabolic and the energy content of the products are equal to that of the reactant.