Human nutrition

Question 1

Describe how food is moved along the small intestine [2]

Answer 1

peristalsis
circular muscles contract to push food

Question 2

State where water is reabsorbed.

Answer 2

small intestine

Question 3

List 3 substances absorbed by microvilli [3]

Answer 3

water
glucose
amino acids
ions
vitamins
oxygen

Question 4

Suggest the role of the muscle tissue in villi [2]

Answer 4

contracts to move villus
changes surface area
increases absorption
increase conc gradient
help to empty lacteal

Question 5

Explain why water is added to food [3]

Answer 5

for breakdown of large insoluble molecules into small soluble ones
dissolve enzymes
softens food
easier to move food
easier to chew

Question 6

Explain why most food nutrients do need to be digested [2]

Answer 6

breakdown large into small
insoluble to soluble

Question 7

Describe the process of emulsification of fats [3]

Answer 7

mix w/ bile
breaks down large fat globules
increases surface area

Question 8

State 2 symptoms of anaemia [2]

Answer 8

tired
shortness of breath
chest pain
fast heartbeat
headache