Unit 2: Human physiology

Question 1

Mouth

Answer 1

Voluntary control of eating and swallowing. Mechanical digestion if food by chewing and mixing w saliva which contains lubricants and enzymes that start starch digestion.

Question 2

Pharynx

Answer 2

Contracts to force food to esophagus

Question 3

Epiglotis

Answer 3

Flap of tissue that covers trachea during swallowing

Question 4

Esophagus

Answer 4

Movement of food by peristalsis from the mouth to the stomach

Question 5

Fall bladder

Answer 5

Stores and regulates the release of bile

Question 6

Liver

Answer 6

Secretes surfactants in bile to break up lipid droplets (increase in S.A)

Question 7

Pancreas

Answer 7

Secretes lipase, amylase and protease

Question 8

Stomach

Answer 8

Churns and mixes w secretes water and acid which kills foreign bacteria and other phatogens in food. Initial stages of protein digestion. Mechanical digestion.

Question 9

Small intestine

Answer 9

Final stages of digestion of lipids, carbohydrates, proteins and nucleic acids. Neutralizes stomach acid and absorbs nutrients. Chemical digestion.

Question 10

Large intestine

Answer 10

Re-absorption of water, further digestion especially of carbohydrates by symbiotic bacteria, forms and stores feces.