A&P - Chapter 40 (Part 4)

Question 1

What are the 3 gastric secretion phases?

Answer 1

1. Cephalic
2. Gastric
3. Intestinal

Question 2

Cephalic phase (4)

Answer 2

1. Sensations of thoughts of food are sent to the brainstem
2. Parasympathetic signals are sent to the gastric mucosa via vagus nerve
3. Gastric juice secretion is stimulated
4. Gastrin secretion is stimulated

Question 3

Gastric phase

Answer 3

Presence of food in stomach triggers reflexes that increase secretion of gastric juices and gastric

Question 4

Intestinal phase

Answer 4

Occurs as food moves into/through duodenum

Question 5

What stimulates the hormonal and nervous reflexes that inhibit stomach activity? (4)

Answer 5

Presence of…

1. Fats
2. Carbs
3. Proteins
4. Acid

Question 6

What is pancreatic secretion stimulated by?

Answer 6

Several hormones released by intestinal mucosa

Question 7

Secretin

Answer 7

Stimulates the production of pancreatic fluid that is low in enzymes and high in bicarbonate

Question 8

What does CCK stimulate?

Answer 8

Contraction of the gallbladder

Question 9

How many days does it take for fecal matter to pass through the large intestines?

Answer 9

3-5 days

Question 10

Constipation

Answer 10

Prolonged time in the large intestines which leads to more water being absorbed and the feces then become more solid and harder

Question 11

Diarrhea

Answer 11

Fecal matter rushes through the large intestines before the water is absorbed