Soc 16: The structure of the blood vessles and blood distribution

Question 1

It transports oxygen, carbon dioxide and nutrients

Answer 1

The heart pumps oxygen around the body, which releases energy stored as glucose. If muscles need to work harder / longer the heart works harder to increase oxygen levels. The circulatory system carries away waste products that cell produce.

Question 2

3 main functions of the cardio respiratory system

Answer 2

Transports oxygen, carbon dioxide and nutrients
It helps blood clot
It controls your body temperature

Question 3

It helps blood clot

Answer 3

The blood contains platelets. If we cut ourselfs, these platelets help to clot the blood, forming a scab that stops the bleeding and heals the wound.

Question 4

It controls your body temperature

Answer 4

If your body gets too hot, the blood vessles close to your skin get bigger or dilate. Blood is diverted towards the surface of the skin to allow more heat to radiate out. If your body gets too cold blood vessles get smaller because blood is diverted away from the surface, less heat loss - the body holds onto more heat.

Question 5

What effect does exercise have on the cardiovascular system and exercise

Answer 5

Exercise makes your body work harder. As a result, your muscles require more oxygen, which means your body needs more oxygen and more nutrients, such as glycogen, to function properly. Oxygen and nutrients are carried to your muscles by the blood, so your heart has to work faster to pump blood around your body. This means that your heart rate (beats per minute) increases.

Question 6

What is adrenaline

Answer 6

Adrenaline is a hormone that makes your heart beat faster, among other things, causes glycogen to be released by the liver, and blood to be diverted away from the organs to the muscles, which need to work harder during exercise.

Question 7

What is the cardio-respiratory system

Answer 7

The interaction of the heart and lungs to supply oxygen to muscles during exercise