Sign up for FREE

TGS 8.1b Bodies Defense - Exam Q JBI

Last updated about 5 years ago

4 questions

1

Question 1

1.

1

Question 2

2.

2

6

The human body has several natural defences against viruses. Some of these prevent viruses from entering the body. Others act once the viruses have entered.
Diagram 2 shows a white blood cell attacking a group of viruses.
Complete diagram 2 by drawing the 2nd stage.

What type of chemical is released by some white blood cells to attack viruses?

Question 3

3.

Hepatitis B is more likely to be spread among people who share needles when they inject drugs. Use information given at the beginning of this question to explain why this is so.

Question 4

4.

The body’s immune system protects us from diseases.
Describe the different ways in which white blood cells protect us from infectious diseases.