Here are exam-style questions covering key aspects of **Coordination (Nervous & Endocrine Systems)**
based on the Zambian Biology syllabus (Suitable for Grade 10-12, especially Grade 12):
---
### **Section A: Multiple Choice & Short Definitions**
1. **Define *coordination* in living organisms.** (2 marks)
2. **What is *homeostasis*?** (2 marks)
3. **State the two main systems involved in coordination.** (2 marks)
4. **The basic functional unit of the nervous system is the:**
a) Hormone
b) Synapse
c) Neuron
d) Gland
*(Choose the correct letter)* (1 mark)
5. **Which type of neuron carries impulses *from* receptors *to* the CNS?**
a) Motor neuron
b) Sensory neuron
c) Relay neuron
d) Effector neuron
*(Choose the correct letter)* (1 mark)
6. **Hormones are transported around the body by the:**
a) Lymph
b) Cytoplasm
c) Blood
d) Nerve impulses
*(Choose the correct letter)* (1 mark)
7. **Which hormone is responsible for lowering blood glucose levels?**
a) Glucagon
b) Adrenaline
c) Insulin
d) Thyroxine
*(Choose the correct letter)* (1 mark)
8. **Give ONE example of an *effector*.** (1 mark)
9. **What is a *reflex action*?** (2 marks)
10. **Name the gland known as the "master gland".** (1 mark)
---
### **Section B: Structured Questions**
**Nervous System:**
11. **State the function of each part of a typical neuron:**
a) Dendrite
b) Axon
c) Myelin sheath
d) Synapse
*(4 marks)*
12. **Outline the pathway of a reflex arc (from stimulus to response), naming all components
involved.** (5 marks)
13. **Explain why reflex actions are important for survival.** (2 marks)
14. **Compare *sensory neurons*, *relay neurons*, and *motor neurons* in terms of their location and
function.** (6 marks)
**Endocrine System:**
15. **Complete the table below:**
| **Gland** | **Hormone Secreted** | **Main Function of Hormone** |
|------------------|----------------------|--------------------------------------------|
| **Thyroid** | Thyroxine |? |
| **Pancreas** |? | Lowers blood glucose |
| **Adrenal** |? | Prepares body for "fight or flight" |
| **Pituitary** | ADH |? |
| **Testes** | Testosterone |? |
*(5 marks)*
16. **Describe how blood glucose concentration is regulated by hormones.** (Name the hormones,
where they are produced, and their actions). (5 marks)
17. **Explain the difference between the *nervous system* and the *endocrine system* in terms of:**
a) Speed of response
b) Duration of effect
c) Method of transmission
*(6 marks)*
---
### **Section C: Essay & Application Questions**
18. **a)** What is meant by *negative feedback* in hormonal control?
**b)** Using the control of *thyroxine* OR *blood glucose* as an example, explain how negative
feedback works.
*(7 marks)*
19. **Describe the role of the nervous system in detecting a hot object and withdrawing the hand.
Include the following terms:** *stimulus, receptor, sensory neuron, relay neuron, motor neuron,
effector, response*.
*(8 marks)*
20. **a)** State THREE differences between nervous and endocrine coordination.
**b)** Discuss ONE advantage of having both systems working together in the human body.
*(7 marks)*
21. **A person with diabetes may have high blood glucose levels.**
**a)** Name the hormone likely deficient or ineffective in this person.
**b)** Explain how this hormone normally works to regulate blood glucose.
**c)** Suggest ONE way this condition can be managed.
*(6 marks)*
---
### **Section D: Diagram-Based (Conceptual)**
22. **Sketch and label a simple diagram of a sensory neuron.** (4 marks)
23. **The diagram below shows a reflex arc. Label parts A–E.**
*(Assume A = Receptor, B = Sensory Neuron, C = Relay Neuron (in spine), D = Motor Neuron, E =
Effector (e.g., muscle))*
*(5 marks)*
---
### **Answers & Mark Allocation Tips:**
* **Section A:** Focus on precise definitions and correct terminology.
* **Section B:** Use bullet points or clear steps for processes (e.g., reflex arc, glucose regulation).
* **Section C:** Structure essays with an introduction, key points, and conclusion. Use specific
examples.
* **Diagrams:** Labels must be clear and correctly linked to structures.
**Good luck with your revision!**
*For past paper practice, check ECZ Biology Papers (5070/1, 5070/2, 5070/3).*
