Nitric Oxide (NO) Participates in a Signal Transduction Pathway That

question 50

Multiple Choice

Nitric oxide (NO) participates in a signal transduction pathway that promotes relaxation of smooth muscle cells lining blood vessels and so increases blood flow.Nitric oxide accomplishes this by

• A) binding to receptors on the muscle cells.
• B) causing an increase in intracellular Ca²⁺.
• C) activating acetylcholine receptors.
• D) activating phosphodiesterase in the muscle cells.
• E) diffusing into the muscle cell and increasing cGMP.

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