What structural feature of the left lung is not shared by the right lung?
A) Cardiac notch
B) Two lobes
C) Supplied by two bronchi
D) All of the answers are correct.
Answer: D
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All of the following substances are present in proximal tubular fluid in the kidney, but which one is NOT normally present in urine?
A. HPO42- B. Ca2+ C. Glucose D. H+ E. K+
Acetylcholine (ACh) may excite postsynaptic neurons in the CNS; however, it may inhibit some postsynaptic neurons in the PNS. Explain how acetylcholine can be both excitatory and inhibitory
What will be an ideal response?
Considering the following events in the nuclear receptor model, identify which of these events occurs in the nucleus.(1) Hormone receptor complex binds to DNA.(2) Messenger RNA directs synthesis of specific proteins.(3) Hormone binds to receptors in the nucleus (sometimes in the cytoplasm).(4) Messenger RNA synthesis is activated.(5) Synthesized proteins produce the response of the cell.
A. 1, 2, 3 B. 3, 4, 5 C. 1, 3, 4 D. 1, 3, 5 E. All events occur in the nucleus.
The ________ ligament encircles the head of the radius and enables it to pivot on the ulna.
Fill in the blank(s) with the appropriate word(s).