Blood

Question 1

What is blood?

Answer 1

Blood is tissue consisting of cells, suspended in fluid

Question 2

What are the two main functions of blood?

Answer 2

Transport of gases, nutrients, hormones, antibodies and heat.
Defence against disease

Question 3

What is the role of red blood cells

Answer 3

To carry oxygen around the body

Question 4

What are the features of a red blood cell?

Answer 4

It has a biconcave shape which increases the surface area to absorb oxygen.
It contains haemoglobin which bonds with oxygen to form Oxyhaemoglobin. it has no nucleus, which means there’s more room for haemoglobin.

Question 5

What is the role of a white blood cell?

Answer 5

To protect from disease 

Question 6

What is the role of platelets?

Answer 6

help our blood clot, stops further blood loss, forms a scab to prevent entry of microbes

Question 7

What does plasma contain?

Answer 7

Dissolved substances

Question 8

What is the equation for a
Cardiac output?

Answer 8

Cardiac output= stroke volume x heart rate

Question 9

Why does heart rate increase during exercise?

Answer 9

Heart rate immediately increases so that cardiac output increases -> more blood is pumped -> more oxygen and more glucose are delivered to the muscle cells in the body -> use these to respire more -> release more energy -> contract more. More oxygen also means that anaerobic respiration could be avoided for longer and avoid muscle fatigue

Question 10

What a the rule of platelets?

Answer 10

To help our blood clot