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Biology - GCSE > Blood > Flashcards

Flashcards in Blood Deck (14):
1

What decreases glucose in the blood

Insulin

2

What increases glucose in the blood

Glucagon

3

What happens if there is too much glucose in your blood

The pancreas releases insulin, which causes the liver to convert glucose into glycogen

4

What happens if there is too little glucose in your blood

The pancreas releases glucagon, which causes the liver to covert glycogen to glucose

5

How is type 1 diabetes caused

A pancreas that doesn’t work

6

How is type 2 diabetes caused

Malnutrition and resistance of insulin

7

Symptoms of type 1 diabetes

Very thirsty and hungry, weight loss and tiredness

8

Symptoms of type 2 diabetes

Headaches, tiredness, extremely hungry and thirsty

9

How can type 1 or type 2 diabetes be detected

Average blood sugar is too low or high

10

What materials are in the blood

Glucose, hormones,oxygen, red and white blood cells, testosterone and estrogen

11

3 types of blood vessels

Arteries - blood AWAY from the heart
Veins - blood TOWARDS the heart
Capillaries - exchange of materials with the tissues

12

Structure of arteries

Strong and thick
Stretchy
Thick walls and small lumen to stay strong at high blood pressure

13

Structure of veins

Thin walls
Large lumen
Muscles outside veins help push blood along
One-way valves to prevent back flow of blood

14

Structure of capillaries

Smallest vessel
Walls only one cell thick - short diffusion distance