Testing ANS #shorts (Part E

The video tutorial explains the role of the sympathetic nervous system in vasoconstriction, highlighting how norepinephrine increases blood pressure. It also covers the production of epinephrine by chromaffin cells in the adrenal medulla, which leads to bronchodilation. Finally, the tutorial discusses the sympathetic influence on the myocardium, emphasizing increased heart contractility.

What effect does the sympathetic nervous system have on systemic arterioles?

• Decreased blood pressure

• No effect

• Vasoconstriction

• Vasodilation

Which neurotransmitter is released by chromaffin cells in the adrenal medulla?

• Epinephrine

• Serotonin

• Acetylcholine

• Dopamine

What is the effect of epinephrine on the airways?

• Increased mucus production

• No change

• Bronchoconstriction

• Bronchodilation

How does the sympathetic nervous system affect the contractility of the heart?

• Decreases heart rate

• No effect

• Increases contractility

• Decreases contractility

Which of the following is NOT an effect of the sympathetic nervous system?

• Increased heart contractility

• Vasoconstriction

• Bronchodilation

• Decreased blood pressure