During development, the midgut artery appears to be markedly narrowed at its origin. Which of the following structures is derived from the midgut and may receive inadequate blood supply?
(A) Gallbladder
(B) Stomach
(C) Descending colon
(D) Ascending colon
(E) Rectum
Answer: (D) Ascending colon
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Which of the following decreases respiratory efficiency?
A) decreased blood flow B) increased surface area C) increased partial pressure gradients D) increased gas solubility E) decreased diffusion distance
The active sites of enzymes are
A) bonds between the substrate and certain amino acids. B) products of an enzymatic reaction. C) not necessarily involved in a reaction. D) regions of an enzyme that are involved in bringing substrates together.
All of the following muscles elevate the larynx EXCEPT the ________
A) palatopharyngeus B) tensor veli palanti C) salpingopharyngeus D) lopharyngeus
The most superior segment of the upper limb is called the ________
A) antebrachial region B) brachial region C) digits D) carpal region E) manual region