Question

question 3 (2 points)
what is the purpose of bile in the digestive process?
○ a) converts starches into glucose
○ b) emulsifies fats
○ c) encourages peristalsis
○ d) stores vitamins

question 4 (2 points)
the digestive action of the stomach begins when it is stimulated by the ______
○ a) nervous system
○ b) esophagus
○ c) liver

Explanation:

Question 3

• Option a: Converting starches to glucose is done by enzymes like amylase, not bile.
• Option b: Bile, produced by the liver and stored in the gallbladder, acts as an emulsifier for fats. It breaks down large fat globules into smaller droplets, increasing the surface area for fat - digesting enzymes to act on.
• Option c: Peristalsis (the rhythmic contraction of the digestive tract) is mainly regulated by the smooth muscle of the digestive organs and the nervous system, not bile.
• Option d: The liver stores some vitamins, but bile does not store vitamins.

• Option a: The digestive action of the stomach can be stimulated by the nervous system. The parasympathetic nervous system (part of the autonomic nervous system) can stimulate gastric secretions and motility when food is sensed (e.g., through sight, smell, or taste) or when food enters the stomach.
• Option b: The esophagus is a tube that transports food to the stomach. It does not stimulate the stomach's digestive action.
• Option c: The liver is involved in producing bile and other metabolic functions, not in stimulating the stomach's digestive action.

Answer:

b) Emulsifies fats

Question 4 (assuming the rest of the options are, for example, d) hormones or other typical options, but based on the visible part and common knowledge):