B3

Question 1

Tissue

Answer 1

Group of cells with similar structure and function working together

Question 2

Organ

Answer 2

Collection of tissues eg. Stomach

Question 3

Organ system

Answer 3

Group of organs working together eg. Digestive sytem

Question 4

The digestive system

Answer 4

A muscular that squeezes food through it containing many different organs

Question 5

Parts of digestive system

Answer 5

Mouth, oesophagus, liver, stomach, pancreas, gall bladder, small intestine and large intestine

Question 6

Mouth

Answer 6

Chop and grind food increasing surface area of food for enzymes to make contact

Question 7

Oesophagus

Answer 7

Pushes food towards stomach

Question 8

Liver

Answer 8

Produces bile which breaks up fat

Question 9

Stomach

Answer 9

Where digestion continues where muscular walls chum up food into chyme

Question 10

Pancreas

Answer 10

Produces digestive enzymes

Question 11

Gall bladder

Answer 11

Stores bile

Question 12

Large intestine

Answer 12

Made up of colon and rectum. Colon reabsorbs water and rectum is where faeces is collected leaving via anus

Question 13

Small intestine

Answer 13

Made up of duodenum and ileum. Duodenum where food mixed with digestive enzymes and bile. Ileum where nutrients from food absorbed into blood

Question 14

Lipids

Answer 14

Fats and oils and most effective energy store in body

Question 15

Proteins

Answer 15

Used for building up cells and tissues in body. Good for muscle recovery and made up of amino acids

Question 16

Carbohydrates

Answer 16

Provide us fuel that makes all reactions of lofe

Question 17

Enzymes

Answer 17

Bilogical catalysts that speed up reaction

Question 18

Different type of enyzymes

Answer 18

Amylase, lipase and protease

Question 19

Amylase

Answer 19

Produced by slavary glands, pancreas and small intestine. Reaction happens in mouth and small intestine. Needed to digest starch breaking up into starch

Question 20

Protease

Answer 20

Produced by stomach, small intestines and pancreas. Needed to digest protein breaking up in amino acids. Reaction ahppens in stomach and small intestine

Question 21

Lipase

Answer 21

Prodcued by pancreas and small intestine. Needed to digest fats and oils producing fatty acids and reaction ahppens in small intestine

Question 22

Factors effecting enzyme actiono

Answer 22

Temperature and pH- if too hot enzymes denature

Question 23

Catalyst

Answer 23

Substance which increases the speed pf reaction

Question 24

Salivary gland

Answer 24

Producse amylase enzyme in saliva

Question 25

Sugar test

Answer 25

Use benedict solutiom- blue to green, yellow or red depending on amount of sugar

Question 26

Starch test

Answer 26

Iodine solutions- browny oragne- black or blue when containing strach

Question 27

Protein test

Answer 27

Biruet- blue to purple

Question 28

Lipid test

Answer 28

Ethanol- cloud white layer if lipid present

Question 29

What happens to air breathed in?

Answer 29

Goes through trachea into two tubes called bronchi one going to each lung. The bronchi split into smaller tubes called bronchioles which end at small bags called alveoli

Question 30

How alveoli carry out gas exchange

Answer 30

Blood returns to lungs from rest of body containing lots of co2 and not much oxygen. Oxygen diffuses out of aleveolus (high concentration) into blood (low concentration). Co2 diffuss out of blood (high concentration) into alveolus (low concentration) to be breathed out