The arrival of fat-rich chyme to the duodenum stimulates the gall bladder to contract and release ________ into the small intestine.
A. cholecystokinin
B. secretin
C. chylomicrons
D. lipase
E. bile
Answer: E
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Average human males are most likely to be attracted to women with a waist to hip ratio of 0.72. Women with this waist to hip ratio are also the most fertile. By being attracted to women with a waist to hip ratio, a male is increasing his chances of having children and thus improve his ____ .
A. longevity B. gene flow C. fitness D. allele frequency
Which one of the following statements about rickettsias is false?
A) Diseases caused by rickettsias are arthropodborne. B) Rickets is caused by a Rickettsia species. C) Rickettsia species cause typhus and typhuslike diseases. D) Rickettsias have leaky membranes.
Answer the question using the accompanying graph. Which portion of the graph shows the free energy of the reaction?
a. A b. B c. C
d. W + X e. Y + Z
Cystic fibrosis is a genetic disease in which thick mucus accumulates over several epithelia and eventually blocks the pulmonary airways. The molecular basis of this disease is the production of a defective
a. mucin. b. chloride/bicarbonate channel. c. Na+-K+ pump. d. Na+-Ca2+ transporter.