Nervous tissue - Digestive system

12 important questions on Nervous tissue - Digestive system

What are two types of membranes that are often found in the digestive system?

- Mucous membrane;
- Serous membrane.

What is the mucous membrane?

The membrane open to the exterior, covered with epithelial cells.

What is the structure of the serous membrane?

It is thin and firm, and it secretes transudate to reduce friction.
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What are the features of the cutaneous membrane of the skin?

It is thick, waterproof and dry (it also has epithelial tissue).

What are the features of the synovial membrane?

- It produces synovial fluid;
- It protects the end of articular bones;
- It has no epithelium, the covering cells are connective tissue.

What are the three ways in which the absorptive area is increased in the small intestine?

- Plica circularis (circular folds);
- Intestinal villi (lamina propria);
- Microvilli.

What is the function of the epithelial cells of the small intestine?

Absorbing water and nutrients.

What are three features of the epithelium?

- Microvilli;
- Glycocalix (protection and digestion peptides);
- Lateral cellular connections: firm attachment and closure of connective tissue underneath.

Which two things are controlled by the enteric nervous system?

- Muscle contractions (peristalsis);
- Secretory activity.

What are the ganglia in the plexus myentericus for?

For the innervation of the peristalsis.

What do the ganglia in the plexus submucosa do?

They control the
- movement of the mucosa;
- secretory activity.

What do the sensory neurons in the plexi do?

They contain sensory information about the content of the intestines (plexus submucosa), and the extend of expansion (plexus myentericus).

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