Gastric juice can back up form the stomach into the esophagus and cause heartburn. What sphincter, weakened by a hiatal hernia, can contributes this condition?
A) upper esophageal sphincter
B) pyloric sphincter
C) external anal sphincter
D) cardioesophageal sphincter
E) ileocecal sphincter
D
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Injury to the neurons of a collateral ganglion would affect the function of the
A) heart. B) pupils. C) sweat glands. D) digestive tract. E) arrector pili muscles.
When the heart is sympathetically stimulated,
a. ESV will likely decrease b. it is responding to acetylcholine c. the fibrous skeleton of the heart is depolarizing d. its stroke volume will decrease e. all except c will occur
Name the substrates and product in the enzymatic reaction catalyzed by RNA polymerase
A) The substrates are DNA nucleotides, and the product is a strand of mRNA. B) The substrates are DNA nucleotides, and the product is a strand of cDNA. C) The substrates are RNA nucleotides, and the product is a strand of mRNA. D) The substrates are RNA nucleotides, and the product is a strand of cDNA. E) The substrates are DNA nucleotides, and the product is a DNA double helix.
Growth hormone does not directly affect bone growth, but instead it stimulates the release of somatomedins from the liver, which in turn promote bone growth
Indicate whether the statement is true or false