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

Biology & Microbiology

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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

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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.

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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

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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.

Biology & Microbiology