The integration of body functions is controlled by the ____
a. respiratory system only
b. nervous system only
c. endocrine system only
d. immune system only
e. nervous system and the endocrine system
ANSWER: e
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When water ionizes, it produces equal amounts of hydrogen and hydroxide ions that can reassociate with each other. The pH of water is:
A. 3 B. 4 C. 5 D. 6 E. 7
What happens when a round cell expands in diameter?
a. Its surface area and diameter increase with the cube of its diameter. b. Its surface area and diameter increase with the square of its diameter. c. Its volume increases faster than its surface area does. d. Its surface area increases faster than its volume does. e. Its volume and surface area expand by the same proportion.
Saturated fats have long, straight tails of fatty acids and can clump tightly together in cells and animal bodies. Unsaturated fats have kinks in their tails due to double bonds, which prevent them from packing together as tightly. Animals that are ectotherms (their body temperature fluctuates with the environment) need to keep their membranes fluid at cooler temperature and thus use in their membranes.
A. mostly unsaturated fats B. mostly saturated fats C. equal amounts of saturated and unsaturated fats D. carbohydrates E. proteins
Most cases of pharyngitis are caused by Group A ß-hemolytic streptococci
Indicate whether the statement is true or false