Question 5
The diagram below illustrates an organ in humans. Study it and answer questions 5(a) to5(d).
(a) (i) Name the organ illustrated. [1 mark]
(ii) Name the parts labeled I, II, III, IV, V and VI. [6 marks]
(iii) State one function each of the parts labeled I, III, IV, V and VI. [5 marks]
Mention three functions of the illustrated organ. [3 marks]
Give three diseases associated with the illustrated organ [3 marks]
(d) State two ways of caring for the organ [2 marks]
Observation
Many candidates attempted this question and their performance was fair and encouraging. Many candidates were also able to name the labelled in Question 5(a)(ii). However, many candidates were not able to state the functions of some labelled parts like hair follicle and hair erector muscle in 5(a)(iii). Correct answers were provided to Questions 5(b),(c) and (d) by many candidates.
The expected answers are as follow:
5(a)(i) Name of illustrated organ
- Mammalian skin/skin
(ii)Parts labelled
I - Sweat pore
II - Sweat gland
III - Hair follicle
IV - Hair erector muscle
V- Sebaceous/oil gland
VI - Epidermis
Note: Correct spelling scores
(iii) Function of the illustrated parts
I – Passage of sweat
III – Anchors the hair into the skin
IV – Causes hair to stand erect
V – Secretes oil/ sebum for lubrication of the skin
VI – Provides a waterproof barrier/protection
(b) Functions of the illustrated organ
- Protection
- Response to stimulus/sensation/sensory organ/named
- Temperature control/regulation
- Excrete waste/sweat/moisture
- Vitamin D production
- Secretion of sebum
(c) Diseases associated with the illustrated organ
- Ringworm
- Athlete’s foot
- Scabies
- Eczema/Dermatitis
- Leprosy
- Acne
- Cancer
- Smallpox/chickenpox
- Correctly named skin disease
(d) Ways of caring for the organ
- Taking bath regularly
- Eating adequate diet
- Not exposing it to chemicals/radiations/harsh weather condition