Water has the ability to dissolve salts and carry dissolved carbon dioxide. How does this action help the human body maintain homeostasis?
A) production of energy for cells
B) distribution of needed materials to the cells
C) removal of waste from the cells and the body
D) absorption of needed materials from the environment
Ans: C) removal of waste from the cells and the body
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Which of the following is an example of acclimatization?
A. sweating while working out B. a dog moving into the shade C. a dog panting on a hot day D. young penguins huddling together to stay warm E. a duck growing thick down underfeathers in fall
Answer the following statements true (T) or false (F)
1. The same hormone can cause vasoconstriction in some arterioles and vasodilation in others. 2. Cardiac output depends solely on the heart rate. 3. Rises in blood pressure with large increases in cardiac output are limited by decreases in total peripheral resistance. 4. A reduction in blood pressure due to hemorrhage would be expected to increase stimulation of baroreceptors.
Prokaryotic cells that are rod-shaped are called _____________.
Fill in the blank(s) with the appropriate word(s).
You work for a company that manufactures food products. A new "wonder food" is being distributed by a rival company. The researchers in your company determine that the "wonder food" contains only carbon, oxygen, and hydrogen. At this point, your
researchers can say with certainty that the food A) includes proteins. B) could only be made of triglycerides. C) could only be made of carbohydrates. D) does not include proteins or nucleic acids.