Question

chapter 14 multiple choice question 14
1 part | -- of 1 point
2 tries left
sympathetic responses generally are widespread because ______.
preganglionic fibers are long
preganglionic fibers are short
ne and epinephrine are secreted into the blood as part of the sympathetic response
inactivation of ach is fairly slow

Explanation:

To determine why sympathetic responses are widespread, we analyze each option:

• "Preganglionic fibers are long": Sympathetic preganglionic fibers are short, so this is incorrect.
• "Preganglionic fibers are short": While preganglionic fibers are short, this alone doesn't explain widespread responses.
• "NE and epinephrine are secreted into the blood as part of the sympathetic response": Norepinephrine (NE) and epinephrine are released into the bloodstream during the sympathetic response. These hormones circulate and act on multiple targets throughout the body, leading to widespread effects.
• "Inactivation of ACh is fairly slow": Acetylcholine (ACh) inactivation speed isn't the reason for widespread sympathetic responses.

Answer:

NE and epinephrine are secreted into the blood as part of the sympathetic response