Organisation

Question 1

What is tissue?

Answer 1

A group of cells with a similar structure and function.

Question 2

What is an organ?

Answer 2

Group of tissue working together for a specific function.

Question 3

What is an organ system?

Answer 3

Group of organs that work together to form an organism.

Question 4

3 main nutrients in food:

Answer 4

Carbohydrates
Protein
Lipids

Question 5

Why do the 3 main nutrients need to be broken down?

Answer 5

This is because they have to be smaller enough to be absorbed into the bloodstream

Question 6

Digestion:

Answer 6

Process of breaking down large food molecules into smaller ones so they can be absorbed into the bloodstream.

Question 7

1st part of digestion:

Answer 7

Mouth: mechanical and chemical/

Question 8

Where does food go after the mouth?

Answer 8

Through the oesophagus into the stomach.

Question 9

Where does the food go after the stomach?

Answer 9

Into the small intestine. Where bile is released from the liver and pancreas.

Question 10

What does the pancreas do?

Answer 10

Releases enzymes that continue the digestion of protein and starch.
ALSO SRTARTS DIGESTION OF LIPIDS.

Question 11

What happens in the large intestine?

Answer 11

Water is absorbed.

Question 12

What are enzymes?

Answer 12

Biological catalysts that speed up digestion.

Question 13

Where are the places where protein is digested?

Answer 13

Stomach, pancreas and small intestine.

Question 14

Where are the places where starch is digested?

Answer 14

Saliva and pancreas.

Question 15

Where are the places where lipids are digested?

Answer 15

Pancreas and small intestine.

Question 16

The first part of the food tests:

Answer 16

1) Pestle and mortar → grind
2) + Distilled water
3) Filter.

Question 17

STARCH TEST:

Answer 17

IODINE
1) test tube
2) add iodine (orange)
3) + = Blue - = orange

Question 18

SUGAR test (Glucose) :

Answer 18

BENEDICT
1) test tube
2) +benedict (blue)
3) hot water bath

+++ = brick red
++ = yellow
+ = green

Question 19

PROTEIN test:

Answer 19

BIURET
1) test tube
2) + biuret (blue)
3) + = purple lilac

Question 20

LIPIDS test:

Answer 20

ETHANOL (NO FILTER )
1) + distilled water +ethanol
2) gently shake
3) + = white emulsion

Question 21

Adaptations of the small intestine:

Answer 21

LONG
VILLI AND MICRO VILLI
THIN MEMBRANE

Question 22

4 components of blood:

Answer 22

Platelets
Plasma
RBC
WBC

Question 23

What is PLASMA:

Answer 23

Transports dissolved substances.

Question 24

Feature of a RBC :

Answer 24

A large amount of haemoglobin
No nucleus or organelles
Flattened and biconcave

Question 25

Examples of what plasma carries:

Answer 25

Oxygen
co2
nutrient
hormone

Question 26

4 main components of the heart:

Answer 26

R Atrium
L Atrium
R Ventricle
L Ventricle

Question 27

L ventricle → Body

Answer 27

AORTA

Question 28

L VENTRICLE → LUNGS :

Answer 28

PULMONARY VEIN

Question 29

FROM LUNGS to L ATRIUM :

Answer 29

PULMONARY VEIN

Question 30

FROM BODY to R ATRIUM :

Answer 30

VENA CAVA

Question 31

FACTORS of CHD :

Answer 31

Smoking
lifestyle
Genetics
Poor diet

Question 32

What is the MAIN RISK FACTOR of CHD?

Answer 32

CHOLESTEROL

Question 33

Definition of transpiration:

Answer 33

Moven=ment of water particles up a plant through the xylem veins.

Question 34

Process of moving water up a plant :
(4)

Answer 34

1) Root hair cells absorb
2) Up xylem tubes
3) Through veins
4) USed for photosynthesis

Question 35

How does CO2 enter a cell?

Answer 35

Stomata

Question 36

Purpose of the lower and upper epidermis:

Answer 36

Exerts waxy substance → waxy cuticle
LOWER: Contains stomata

Question 37

Purpose of U MESOPHYLL:

Answer 37

COMPACT → Packed with chloroplast

Question 38

Purpose of SPONGY MESOPHYLL:

Answer 38

SPREAD → Gas exchange