Ch. 48a

Question 1

six nutrients+ ex.

Answer 1

carbohydrates- starches 
proteins- meat
lipids- fats
vitamins- vitamin B
water- water?

Question 2

importance of fiber for digestion

Answer 2

stimulates contractions of the smooth muscles that form the walls of digestive organs

Question 3

vitamins

Answer 3

work as coenzymes which enhance enzyme activity
fat and water soluble
ex: vitamin A, B, C

Question 4

minerals

Answer 4

inorganic substances necessary for making certain body structure, nerve and muscle function and maintaining osmotic balance

Question 5

mechanical digestion

Answer 5

physically breaking food into smaller particles which increases surface area
happens at mouth and stomach

Question 6

chemical digestion

Answer 6

a change or breakdown in the chemical nature of the nutrient

happens at stomach, mouth, pancreas

Question 7

Villi

Answer 7

Highly folded lining of small intestine is covered with millions of finger like projections
Add surface area=more absorption by diffusion and active transport
Contain capillaries and lacteals

Question 8

Lacteals

Answer 8

Tiny lymph vessels

Carry substances through lymph vessels and eventually blood stream