Match the layer of the GI tract wall with its correct characteristics.

A) Contains the nerve plexus that regulates secretions
B) Contains cells that secrete hormones
C) Contains invaginations to increase surface area
D) Layer of the wall that is in contact with food bolus
E) Contains the circular and longitudinal smooth muscles
F) Outermost layer of the GI wall
G) Contains the nerve plexus that regulates motility

1. Mucosa
2. Submucosa
3. Muscularis externa
4. Serosa


Answer:

1. Mucosa: B) Contains cells that secrete hormones

2. Submucosa: A) Contains the nerve plexus that regulates secretions

3. Muscularis externa: G) Contains the nerve plexus that regulates motility

4. Serosa: E) Contains the circular and longitudinal smooth muscles

Anatomy & Physiology

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