Lifestyle & Health (AQA GCSE Combined Science: Synergy: Life & Environmental Sciences): Exam Questions

Students were asked to estimate the percentage risk of a person becoming infected with different STDs.

The estimate was compared to the actual percentage risk of infection.

Figure 7 shows the results.

The students estimated that the risk of HIV infection was 60%.

Plot the students' estimated risk of HIV infection on Figure 7.

Which STD in Figure 7 shows the greatest actual risk?

Calculate the difference between the estimated risk and the actual risk of becoming infected with chlamydia.

What conclusion can be made about the estimated risk of infection compared to the actual risk of infection with STDs?

Name one type of contraception that can control the spread of chlamydia.

Figure 1 shows some of the organs in the human body.

Which organ is the pituitary gland?

Which organ produces oestrogen?

Homeostasis is the control of the body's internal conditions.

Which internal body condition is controlled by homeostasis?

Homeostasis also controls blood glucose concentration.

Figure 2 shows the change in blood glucose concentration in a person during 180 minutes.

When did the person start eating a meal?

Use Figure 2.

When blood glucose concentration is high the hormone insulin is released into the blood.

Complete the sentence.

Choose the answer from the box.

Insulin is produced by the _______________.

When will the concentration of insulin in the blood be the greatest?

Use Figure 2.

What might have caused the fall in blood glucose concentration at 150 minutes?

Explain how diet and lifestyle can increase the risk of poor health and non-communicable diseases.

One symptom of chlamydia infection is damage of the uterus lining.

Which two hormones are involved in maintaining the uterus lining?

Explain how only some types of contraception reduce the spread of STDs.

The protein from the spider could be used in a new drug to treat patients having a heart attack.

When a person has a heart attack:

• cells in the heart muscle do not receive enough oxygen

• cells in the heart muscle stop working.

Why are heart attacks non-communicable?

The protein from the poison may be used in a new drug.

The protein allows heart muscle tissue to function in low concentrations of oxygen.

Explain how coronary heart disease can decrease the concentration of oxygen in heart muscle tissue.

The new drug may be useful when transporting a donor heart to a patient for a heart transplant.

Suggest why.

The species of funnel-web spider that produces the poison comes from a small, remote area.

Evaluate the use of the poison from the funnel-web spider as a drug.

Figure 9 shows a diagram of the human heart.

Name parts A and B.

A = _________________________________________________

B = _________________________________________________

Coronary heart disease (CHD) develops when layers of fatty material build up in the coronary artery.

One treatment for CHD is to insert a stent into the coronary artery.

Figure 10 shows a stent in a coronary artery.

Explain why the stent helps to prevent a heart attack.

Look at Table 2.

Table 2

Plot the missing bars for countries D and E on Figure 11 .

Use data from Table 2.

Figure 11

People in country B are more likely to die from CHD than people in country E.

How many more times as likely are people to die from CHD in country B than in country E?

A student concluded:

'The factor that causes CHD is not eating enough fruit and vegetables.'

Evaluate the student's conclusion.

Use data from Figure 11 , and your own knowledge, in your answer.

Blood sugar levels in the body are controlled by insulin.

How does insulin travel around the body?

Table 3 shows the blood sugar levels for two people after eating a meal.

Use data from Table 3 to complete the graph in Figure 4.

Plot the points for person A.

The first two points (0,70) and (1,150) have been plotted for you.

Draw a line through all the points.

How long after the meal is person B's insulin production at its peak?

(Person B's blood sugar rises from 130 to 230 between 0 and 1 hour, then falls.)

What is the greatest decrease in the blood sugar level of person B in an hour?

Decrease = _______________mg per 100 cm³

Estimate how long after eating the meal it will take for person B's blood sugar level to return to the level before the meal .

Show your working on Figure 4 (extrapolate Person B's line).

Coronary heart disease (CHD) can be caused by many factors.

Table 3 shows data related to CHD for five countries.

Table 3

Name one risk factor for CHD that is not shown in Table 3.

A student concludes that the main cause of CHD is not eating enough fruit and vegetables.

Give three reasons why the student's conclusion is not correct.

Use information from Table 3.

Explain how the build-up of fatty material can damage the heart.

Describe how statins can help to reduce deaths from CHD.

Figure 10 shows how the concentrations of the reproductive hormones in the blood of a woman change over 28 days.

Name hormones A and B.

A = __________________________________________________

B = __________________________________________________

Use information from Figure 10 to explain what happens on Day 14.

In Vitro Fertilisation (IVF) treatment can be used to help women become pregnant.

IVF uses some of the hormones shown in Figure 10.

Explain why IVF increases the chance of some women becoming pregnant.