Blood components+Cell Lysis

Question 1

Two major functions of the circulatory system.

Answer 1

• Transports absorbed food molecules (in the blood)
• Defends against disease

Question 2

Three main components of the circulatory system.

Answer 2

Blood
Blood vessels
Heart

Question 3

Why do RBC have no nucleus?

Answer 3

Allows more room for oxygen to be transported

Question 4

What is Biconcave shape?

Answer 4

Shape like a nut

Question 5

Why is iron required in a diet?

Answer 5

To make haemoglobin

Question 6

What is the job of the RBC?

Answer 6

Carry oxygen from lungs to tissues/cells of the body.

Question 7

Phagocytes

Answer 7

-Lobed nucleus, fewer in number to RBC, larger
- Engulf and digest microbes

Question 8

Lymphocytes

Answer 8

• Round nucleus, fewer in number to RBC, larger
• Produce antibodies to respond to foreign cells/microbes

Question 9

Platelets

Answer 9

• Cell fragments
• Converts fibrinogen (soluble protein) to fibrin (insoluble) which traps RBC and makes them clot and form a scab over the wound

Question 10

Plasma

Answer 10

Fluid containing water, minerals, protein (fibrin), waste products, dissolved food and hormones

Transports cells, heat and dissolved molecules

Question 11

Cell Lysis

Answer 11

When the animal cell is placed in water it swells and bursts. Salts and other chemicals in blood plasma keep the concentration similar to the RBC, preventing the cells bursting.