Homeostasis Exam-Style Questions

Question 1

Q1. Knowledge Recall (2 marks)

Define homeostasis and explain its importance in living organisms.

Question 2

Q2. Application (3 marks)

A person drinks a cup of hot tea (100°C). Describe the thermoregulatory responses that help maintain body temperature.

Question 3

Q3. Data Analysis (4 marks)

The graph below shows the blood glucose concentration of a person over time after a meal.

[Graph: Blood glucose concentration (mmol/L) on y-axis, Time (hours) on x-axis, with a curve showing a peak at 2 hours and then a decrease over 5 hours]

Explain how the pancreas uses negative feedback to maintain blood glucose concentration.

Question 4

Q4. Knowledge Recall (2 marks)

List two hormones involved in maintaining blood glucose concentration.

Question 5

Q5. Application (3 marks)

Explain how receptor cells in the skin detect changes in temperature.

Question 6

Q6. Data Analysis (4 marks)

The table below shows the water potential (Ψ) of a plant cell in different solutions.

Solution

Ψ cell (kPa)

Distilled water

-100

0.1 M NaCl

-200

Explain the direction of water movement and the effect on the cell shape in each solution.

Question 7

Q7. Knowledge Recall (2 marks)

Explain the role of negative feedback in the control of heart rate.

Question 8

Q8. Application (3 marks)

Describe the adaptations of the human kidney for its role in osmoregulation.

Question 9

Q9. Data Analysis (4 marks)

The graph below shows the effect of temperature on the rate of an enzyme-controlled reaction.

[Graph: Reaction rate (arbitrary units) on y-axis, Temperature (°C) on x-axis, with a parabolic curve peaking at 37°C]

Explain the shape of the curve and why the reaction rate decreases above 37°C.

Question 10

Q10. Knowledge Recall (2 marks)

List two receptors involved in detecting blood glucose concentration.

0.2 M NaCl

-300

Expert Maths & Science Tutoring