solved. Question
Asked by esterjam
4. (a) How are structures of the human eye adapted to their functions ( 14 marks)
(b) State three defects of the eye and how each can be corrected ( 6 marks)
5. State the changes that occur in a nerve axon to produce an action potential
( 3 marks)
6. In an accident a victim suffered brain injury. Consequently he had loss of memory. Which part of the brain was damaged? ( 1 mark)
7. The diagram below shows surface view of a human brainÂ
(a) Name the parts labeled B and C ( 2 marks)
(b) State three functions of the part labeled A ( 3 marks)
(c) State what would happen if the part labeled B was damaged. ( 1 mark)
8. What is the function of the following cells in the retina of the human eye?
(2 marks)
(a)Â Cones
(b) Rods
9. (a) State the functions of the following parts of the mammalian ear
(i)Â Tympanic membrane ( 3 marks)
(ii) Eustachian tube ( 1Â mark)
(iii) Ear ossicles ( 2 marks)
(b) Describe how semi- circular canals perform their functions ( 2 marks)
10. State the importance of tactic response among some members of Kingdom Protista? ( 1Â mark)
(a) What name is given to response to contact with surface exhibited byÂ
tendrils and climbing stems in plants? ( 1 mark)
(b) State three biological importances of tropisms to plants (3 marks)
11. The diagram below represents a reflex arc in human
(a) Name the parts labeled X and Y ( 2 marks)
X __________________________
Y __________________________
(b) Name the substance that is responsible for the transmission of an impulse acrossÂ
the synapse ( 1 mark)
12. (a) State the function of the ciliary muscles in the human eye. (1 mark)
(b) State two functional differences between the rods and cones in the human eye ( 2 marks)
13. State the function of each of the following parts of human ear ( 4 marks)
(a) Ear ossicles
(b) Cochlea
(c) Semi- circular canals
(d) Eustachian tube
14. (a) Where in the human body are relay neurons found? ( 1 mark)
(b) The diagram below represents a neurone
SCIENCE
HEALTH SCIENCE
NURSING
