Which organ is responsible for the cleanup of destroyed red blood cells?
a. spleen
b. kidney
c. bone marrow
d. heart
e. lungs
ANSWER: a
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An animal's metabolic rate is best defined as:
A. its overall rate of energy use. B. the total amount of oxygen consumed by an animal. C. a measure of how quickly ATP is produced by body cells. D. a measure of how quickly food is digested. E. its overall activity level.
If a reaction is endergonic, what can we infer about the reaction?
a. ?H must be positive
b. ?H must be negative c. ?G must be positive d. ?G must be negative e. ?S must be positive
Which of the following is a reaction by mammals to cold that limits the amount of heat lost to the
surroundings?
a. shivering b. going off to lay alone so that others do not take their heat c. pressing hair shafts close to the body d. reducing blood flow to the skin e. losing brown adipose tissue
What is the main role of membrane proteins?
A) Hold the phospholipid bilayer together B) Block materials from entering the cell C) Regulate the passage of materials in and out of the cell D) There are no membrane proteins in the plasma membrane