Human Higher - 25/02

WELCOME!

Open Ended

Describe what happens at stage A

Multiple Choice

(c) Name the chemicals which aid the movement of T lymphocytes to the site of infection.

• histamine

• cytokines

• adrenaline

• antibodies

Multiple Choice

The virus that causes influenza can evade the specific immune response by:

A - attacking phagocytes

B - attacking lymphocytes

C - surviving within phagocytes

D - showing antigenic variation.

• A - attacking phagocytes

• B - attacking lymphocytes

• C - surviving within phagocytes

• D - showing antigenic variation.

Open Ended

(ii) Describe how T lymphocytes destroy infected body cells.

Multiple Choice

Use the information from the table to match each condition to the correct patient.

which patient is experiencing an allergic reation?

• patient X

• patient Y

• patient Z

Multiple Choice

Use the information from the table to match each condition to the correct patient.

which patient is experiencing HIV?

• patient X

• patient Y

• patient Z

Multiple Choice

Use the information from the table to match each condition to the correct patient.

which patient has an infected wound?

• patient X

• patient Y

• patient Z

Open Ended

(i) Suggest a reason for the decrease in HIV concentration during the first year after infection.

Open Ended

(ii) Explain why the T lymphocyte concentration is decreasing between 1 and 5 years after infection.

Multiple Choice

Which term would be used to describe a global outbreak of an infectious disease?

• Endemic

• Sporadic

• Epidemic

• Pandemic

Multiple Choice

In Scotland cases of influenza are always present but occasionally they rise to unusually high levels. In this case, the disease is said to have changed from being

• A - epidemic to endemic

• B - endemic to epidemic

• C - sporadic to epidemic

• D - endemic to sporadic