35 - Lecture on the Digestive System and Appetite Regulation

These flashcards cover key concepts in the digestive system and appetite regulation, as discussed in the lecture.

What is the gastrointestinal tract also known as?

Also called the GI tract or alimentary canal.

What are the two main types of digestion?

Mechanical digestion and chemical digestion.

What is the function of salivary glands in the digestive system?

They contribute to the processes of digestion.

What must happen for nutrients to be absorbed from the GI lumen?

They must cross plasma membranes.

What does the feeding center in the hypothalamus do?

It is tonically active and stimulates appetite.

What happens when glucose levels are low in the CSF?

Activity in the hypothalamus 'feeding center' increases, stimulating appetite.

What is ghrelin and what is its role?

A hormone released by the stomach that stimulates appetite.

How does leptin regulate appetite?

It decreases appetite when body fat stores are high.

What are the potential problems the digestive system must protect against?

It must protect against the strong acidic environment and digestive enzymes.

What role does the parasympathetic system play in digestion?

It regulates motility and is associated with the 'rest & digest' response.