Predict what would happen if the pulmonary vein returned blood to the right atrium.
A. Abnormally high levels of oxygenated blood would be pushed into the systemic circuit.
B. Oxygenated blood would be kept in a circular path between the heart and lungs-it would not reach the systemic circuit.
C. Abnormally high levels of deoxygenated blood would be pushed into the systemic circuit.
D. The expected cardiac cycle would occur-this is the normal path.
Answer: B
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Nitric oxide (NO) binds to an ____
a. internal receptor and activates a second messenger cascade b. internal receptor and triggers a phosphorylation cascade
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A(n) ________ directs the making of a protein
Fill in the blank(s) with correct word