What triggers the defecation reflex?
A. Contraction of the colon
B. Stretching of the rectum
C. Voluntary contraction of a sphincter
D. Emotional stress and a diet low in fiber
E. Sufficient concentration of feces due to water removal
Answer: B
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Indicate whether the statement is true or false.
Gene therapy is currently used to treat all of the following diseases EXCEPT
A) severe combined immunodeficiency disease (SCID). B) Duchenne's muscular dystrophy. C) cystic fibrosis. D) LDL-receptor deficiency. E) colon cancer.
Which of the following has X-linked recessive inheritance?
a. Duchenne muscular dystrophy b. phenylketonuria c. achondroplasia d. sickle-cell anemia e. cystic fibrosis
How many CO2 molecules are generated from each pyruvate molecule that enters the mitochondrial matrix?
A) One B) Two C) Three D) Four E) Five