GRADE 9 IGCSE

Research about the following:

1. The state of equilibrium in being reached in diffusion.

2. Why do plants wilt? How can wilting be controlled?

3. Explain why animal cells do n0t build up turgor pressure.

4. Tissue culture.

5. Reverse osmosis.

6. IONS

7. How to measure the rate of Osmosis.

8. Experiments that involves movement of water.

GRADE 10: RESEARCH

1. Describe the human nervous system in terms of the central nervous system and the peripheral nervous system.

2. Describe the structure and function of the eye, including accommodation and pupil reflex.

3. Identify motor (effector), relay (connector)and sensory neurones and draw diagrams.

4. Describe a simple reflex arc in terms of sensory, relay and motor neurones, and a reflex action as a means of automatically and rapidly integrating and coordinating stimuli with responses.

5. Define a hormone as a chemical substance, produced by a gland and carried by the blood.

6. State the role of the hormone adrenaline in the chemical control of metabolic activity, including increasing the blood glucose concentration and pulse rate.

7. Compare nervous and hormonal control systems.

8. Give examples of situations in which adrenaline secretion increases.

9. Define and investigate geotropism and phototropism.

10. Explain the chemical control of plant growth by auxins including geotropism and phototropism in terms of auxins regulating differential growth.

11. Define and Identify, on a diagram of the skin: hairs, sweat glands, temperature receptors, blood.

12. Describe the maintenance of a constant body temperature in humans in terms of insulation and the role of temperature receptors in the skin, sweating, shivering, vasodilation and vasoconstriction of arterioles supplying skin-surface capillaries and the coordinating role of the brain. vessels and fatty tissue.in homeostasis.

12. Explain the concept of control by negative feedback.
13. Describe the control of the glucose content of the blood by the liver, and by insulin and glucagon from the pancreas.

GRADE 9 IGCSE

RESEARCH

All research should be saved first and will be submitted a

t the end of each SEMESTER inside the PORTFOLIO!!!

Research on the following:

1. History of the Cell Theory.

2. Cell parts that have membranes.

3. The function of the Cell Wall in Plants

4. The importance of ER in the synthesis of protein.

5. What are LYSOSOMES and why are they considered as "suicidal sacs"?

6. How can a Paramecium perform all cell processes?

7. Where would you find more mitochondria? Explain.

8. Comparison between an animal cell and a plant cell.

9. Prokaryotes.

10. New discoveries about CELL.

11. Relate the structure of the following to their

functions

• red blood cells – transport,

• root hair cells – absorption.

Grade 9: Research

1. Research about the process of DNA reproduction.

2. How new proteins are made?

3. What is RNA?

4. Research about Rosalind Franklin and Maurice Wilkins.

5. Research about James Watson, Francis Crick and the double helix.

6. What is embryo screening?

7. Research about amniocentesis.

8. Research about genetic fingerprinting.

GRADE 8: ENDOCRINE SYSTEM

Research on the following:

1. What is a gland? How does it function?

2. What are the different gland in the body and their location?

3. How do exocrine glands differ from endocrine glands?

4. Define hormones and give their functions.

5. Why is the pituitary gland called the master of glands?

6. Why are adrenal glands called the emergency glands?

7. How can seafoods help prevent goiter?

8. Give the significant role of insulin in blood sugar level.

9. Predict the effect of removing the pancreas of a person.

10. Summarize the function of the endocrine glands:

a. pituitary

b. thyroid

c. parathyroid

d. thymus

e. adrenal

f. pancreas

g. liver

11. Why is the endocrine system considered a regulatory system?

12. What would happen if the adrenaline were continuously released in the body?

13. Do research on diabetes mellitus and diabetes insipidus- their difference in cause symptoms and treatment.

14. prostaglandins and the perception of pain

15. Negative feedback in hormonal function.

16. Why are some hormones taken orally, while others like insulin are injected in the body?

17. A swimmer's heartbeat increases significantly both before and after swimming. Explain

Grade 10: PORTFOLIO

Research the following:

1. Give the functions of the nervous system

2. What is a neuron?

3. Identify the structures concerned with the following:

a. screening the stimuli that reach the cerebrum

b. body controls of the autonomic nervous system

c. controlling heartbeat rate and breathing

4. Identify and give the functions of the following:

a. cranial nerves i. dendrites

b. sensory nerve fibers j. cerebellum

c. motor nerve fibers k. axon

d. spinal cord l. synapse

e. cerebral cortex m. olfactory nerve

f. medulla oblangata n. optic nerve

g. pons o. retina

h. pupil p. myelin sheath

5. Why is the rapid removal of acetylcholine important in controlling impulse transmission?

6. Explain how the following processes take place through your nervous system:

a. muscle contraction

b. heartbeat

c. expanding of blood vessels

d. vision during daytime and night time

e. hearing

7. Discuss the structure of the eye with its parts and functions

8. Discuss the structure of the ear with its parts and functions

Grade 9: TRANSPORT IN HUMANS

RESEARCH ON THE FOLLOWING:

1. What materials are transported during blood circulation?

2. Give the constituents of the blood.

3. What are the major functions of blood in our body?

4. State the roles performed by the following:

A. red blood cells

B. white blood cells

C. platelets

D. Veins

E. Capillaries

F. arteries

G. tricuspid valve

H. lymph

I. heart

J. pulmonary vein

K. spleen

5. How is blood clotting brought about?

6. Describe the function of the heart in transporting blood.

7. Describe the structure of the heart including its parts.

8. What is the role of the lungs in circulation?

9. What is a lymph? What is it made of? How is it transported in the body?

10. What is a complete blood count?

11. Discuss diseases of the blood and how they are brought about.

12 Do research on the work of William Harvey, and summarize his report on blood circulation.

13. Heart transplant and artificial heart.

14. What is a pacemaker?