Exposure to ultraviolet light darkens skin by stimulating synthesis of
A) hemoglobin. B) cyanin. C) carotene. D) melanin.
D
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All of the following are characteristics of anabolism EXCEPT:
a) It involves synthesizing new biomolecules. b) It primarily involves endergonic reactions. c) It releases large amounts of energy. d) An example of anabolism is linking amino acids together to form proteins. e) An example is the formation of two ammonia molecules from one nitrogen molecule and three hydrogen molecules.
During systemic gas exchange, oxygen diffuses from the blood to the tissues and carbon dioxide diffuses from the tissues to the blood.
Answer the following statement true (T) or false (F)
Which of the following factors would NOT tend to increase systemic arterial blood pressure?
A. Increased venous return B. Increased blood volume C. Increased parasympathetic stimulation D. Increased sympathetic stimulation E. Increased activity of the skeletal muscle pump
In glycolysis, six-carbon glucose molecules are broken down into two three-carbon molecules of __________.
a. oxaloacetic acid b. pyruvic acid c. acetyl-CoA d. citric acid