digestive system

Question 1

what is the buccal cavity made of

Answer 1

teeth
tounge
pallete

Question 2

what happens in buccual cavity

Answer 2

saliva binds find together
salivary amylase digests startch to maltose
mineral salts - regulates pH around 7

Question 3

what is saliva made of

Answer 3

mucin

Question 4

what enzyme is secreted in buccal cavity

Answer 4

amlyase

Question 5

what is the function of the digestive system

Answer 5

large organic masses are broken down into smaller particles the body can use as fuel

Question 6

what is the function of buccal cavity - mechanical

Answer 6

mechanical digestion and chewing takes place

Question 7

what is the function of the buccal cavity - chemical reaction

Answer 7

saliva in the mouth consists of mucin
salivary amylase digests startch to maltose
mineral salts regulates pH to 7

Question 8

how does proportions of layers of the gut wall differ

Answer 8

folding of mucosa - less in oesophagus
more in ileum

Question 9

what is defenition of chemical digestion

Answer 9

breakdown of large molecules into small soluble molecules using enzymes

Question 10

what is defenition of mechanical digestion

Answer 10

cutting action of the teeth followed by the rhythmic contraction of the gut

Question 11

what is oesophagus lined with

Answer 11

mucous membrane

Question 12

function of mucus

Answer 12

protects the lining of the stomach from digestion by protease
stops friction
helps peristalsis

Question 13

4 parts of the colon

Answer 13

ascending
transverse
descending
sigmoid

Question 14

5 bits of the gut lining

Answer 14

mucosa
submucosa
circular muscle
longitudinal muscle
serosa

Question 15

function of mouth

Answer 15

mechanical digestion, moistened by saliva
salaiva includes enzyme amylase which breaks down startch into maltose
mucus binds food together and lubricates it

Question 16

oesophagus function

Answer 16

bolus is pushed down by peristalsis

Question 17

what is peristalsis

Answer 17

localised contraction of circular muscles

Question 18

what is peristalsis

Answer 18

localised contraction of circular muscles

Question 19

what enzymems do pancrease secrete

Answer 19

amylase
lipase
trypsin

Question 20

what does stomache do

Answer 20

churns the bolus with gastric juices to form chyme
absorbs water and fat soluble substances such as alcohol

Question 21

what makes stomach acidic

Answer 21

HCL
optimum pH for for pepsin to work and kills bacteria

Question 22

function of pancrease

Answer 22

secretes pancreatic juice, enters duodenum thrugh pancreatic duct

Question 23

where is the bile produced

Answer 23

liver

Question 24

where is bile stored

Answer 24

gall bladder

Question 25

function of bile

Answer 25

emulsify large globules of fat into tiny droplets so they have a larger srface area for lipase to work

Question 26

secondary function of bile

Answer 26

helps to neutralise acidity of the food from the stomach

Question 27

what to rwtchan in abot liver

Answer 27

bile

Question 28

what does the walls of the duodenm contain

Answer 28

secretes alkaline juice and mucus

Question 29

what does duodenum do

Answer 29

enzymes on the vili complete digestion maltase endopeptidases

Question 30

what is ileum adapted for

Answer 30

absorption

Question 31

what are on the vili of ileum

Answer 31

epithelial cells with microscopic projections called microvili

Question 32

what does microvili do

Answer 32

increase surface area of the cell membrane of the epithelial cells for absorption

Question 33

what is there a lot of in microvili

Answer 33

mitochondria

Question 34

what happens in the colon

Answer 34

water and minerals absorbed bacteria lives there responsible for making vit K and folic acid