Increased parasympathetic stimulation a increases heart rate

Increased parasympathetic stimulation:

(a) increases heart rate.

(b) increase gastric motility.

(c) causes sweat glands to release sweat.

(d) causes blood vessels in the skin to dilate.

(e) causes the pupils to dilate.

Solution

Answer: (b) Increase gastric motility.

Reason: Increased parasympathetic stimulation has a role in gastric motility through mucus secretion. Mucus consists of specific family of glycoproteins termed mucins and is generally very viscous and mucus is released in the stomach and intestine, and serves to lubricate and protect the inner mucosa of the tract. Mucus is made by two types of specialized cells termed mucus cells in the stomach and goblet cells in the intestines. Signals for increased mucus release include parasympathetic innervations, immune system response and enteric nervous system messengers.