Human Biology Unit 2

Physiology and Health

A and B Test

Section / Mark
Section A / /10
Section B / /30
Total / /40
Percentage
Grade

Teacher Comment:

Pupil Comment:

Section A

The graph below shows the growth, in length, of a human foetus.

What is the percentage increase in length of the foetus during the final four

months ofpregnancy?

A 33·3%

B 60·0%

C 62·5%

D 150·0%

The diagram below shows a cross-section of the heart.

Which of the following statements describes the movement of the valves during ventricularsystole?

A Valves P and Q open and valves R and S close

B Valves P and R open and valves Q and S close

C Valves P and Q close and valves R and S open

D Valves P and R close and valves Q and S open

Changes in the ovary during the menstrualcycle are described below.

1 Corpus luteum forms

2 Ovulation occurs

3 Progesterone is produced

4 Corpus luteum degenerates

5 Graafian follicle develops

The sequence in which these changes occurfollowing menstruation is

A 2, 3, 1, 5, 4

B 2, 1, 3, 4, 5

C 5, 3, 2, 1, 4

D 5, 2, 1, 3, 4.

Which of the following statements about lipoprotein is correct?

A LDL transports cholesterol from body cells to heart

B LDL transports cholesterol from body cells to liver

C HDL transports cholesterol from body cells to heart

D HDL transports cholesterol from body cells to liver

Chronic elevation of blood glucose levels is not responsible for which of the following conditions?

A Renal failure

B Retinal damage

C Phenylketonuria

D Peripheral nerve dysfunction

A function of the interstitial cells in the testes is to produce

A sperm

B testosterone

C seminal fluid

D follicle stimulating hormone (FSH)

Which of these cross sections through a blood vessel represents a vein?

Cardiac output is calculated using the following formula:

Cardiac Output = Heart Rate X Stroke Volume

The table below shows the heart rate and cardiac output of four individuals.

Which individual has the greatest stroke volume?

Which of the following may need to receive anti-Rhesus antibodies?

A A Rhesus positive mother after the birth of her Rhesus negative baby

B A Rhesus positive mother after the birth of her Rhesus positive baby

C A Rhesus negative mother after the birth of her Rhesus negative baby

D A Rhesus negative mother after the birth of her Rhesus positive baby

10. Phenylketonuria is caused by a single autosomal gene. A man and a woman,

who are unaffected, have an affected child.

What is the probability that their next child will be affected?

A 25%

B 50%

C 75%

D 100%

Section B

1. The graph below shows the concentration of two ovarian hormones in a woman’s

blood during her menstrual cycle.

(a) Name hormone X.

______(1)

(b) What effect does oestrogen have on the following structures?

(i) The uterus between days 4 and 12 in the cycle.

______

______(1)

(ii) The pituitary gland on day 12 of the cycle.

______

______(1)

pregnant during this cycle.

______

______(1)

2. Duchenne’s muscular dystrophy is an inherited condition in which muscle fibres

gradually degenerate. The condition is sex-linked and caused by a recessive

allele.

The family tree below shows the inheritance of the condition through three

generations of a family.

(a) (i) Using the symbols D and d, to represent the alleles, state the genotypes of

individuals R and S.

R ______S ______(1)

(ii) What percentage of the grandsons have muscular dystrophy?

______(1)

(iii) Sisters T and U each go on to have a son.

For each sister, state the percentage chance of her son having muscular

dystrophy.

Son of T ______Son of U ______(1)

(b) Where conditions such as Duchenne’s muscular dystrophy exist in a family, the

family history can be used to determine the genotypes of its individual members.

What term is used for this process?

______(1)

3. The graph below shows changes in the volume of blood in the left ventricle of a

man’s heart.

(a)How long does ventricular systole last?

______s (1)

(b)(i) What is the heart rate of this man?

______beats per minute (1)

(ii) Calculate the volume of blood leaving this man’s left ventricle every minute.

Space for calculation

______cm3 (1)

significantly.

Describe how the nervous system and hormones cause this increase.

______

______(3)

4. The diagram below represents a section through an artery.

(a) Describe how the presence of muscle tissue in the artery wall helps to control

the flow of blood around the body.

______

______(1)

(b) Describe how an atheroma forming under layer X may lead to the formation of a

blood clot and state the possible effects of this.

Space for answer

(5)

5. The graph below shoes changes in blood glucose concentration in a diabetic and

a non-diabetic individual after each had consumed a glucose drink.

(a) (i) Choose one individual, A or B and indicate whether the individual is diabetic

or non-diabetic.

Individual ______

Using evidence from the graph, justify your choice.

______

______(1)

(ii) Using data from the graph, describe the changes that occurred in the blood

glucose concentration of individual A after consuming the glucose drink.

______

______(2)

(b) Describe the role of insulin in the development of type 1 diabetes.

______

______(1)

6.Rising levels of obesity are a major concern in modern Scottish society.

Successive governments have tried to promote healthy eating and exercise in an

attempt to address this problem.

(a)(i) One measure of obesity is the body mass index (BMI).

What measurements are taken to calculate BMI?

______(1)

(ii) What is the minimum value of BMI that is generally used to indicate that an

individual is obese?

______(1)

(b) Why should the dietary intake of carbohydrate in the form of free sugar be

limited?

______

______(1)

______

______(1)

(d) State two ways that exercise reduces the risk factors for cardiovascular

disease (CVD).

1 ______

2 ______(1)