digestive system

Question 1

explain the six digestive system functions?

Answer 1

1. ingestion
2. mechanical digestion and propulsion
3. chemical digestion
4. secretion
5. absorption
6. defection

Question 2

identify all of the organs in the digestive system and explain their functions?

Answer 2

tongue, stomach, small intestine, large intestine, liver, gallbladder, pancreas

Question 3

describe the major layers of the walls of the digestive tract and their functions?

Answer 3

there are 4 major layers, mucosa (secretion absorption), submucosa (binds mucosa to muscular layer), muscularis external (contraction), serosa (membrane which acts as an attachment point)

Question 4

explain the processes that allow materials to move through the digestive tract

Answer 4

involves contraction and relaxation of smooth muscle

highly coordinated contractions vital for movement of materials along GI

Question 5

describe how the digestive system is regulated?

Answer 5

regulated to control rate of secretion/ absorption
requires for homeostasis
regulated through nerves, PNS, ANS, endocrine hormones,
smooth muscle, exocrine glands