2.4.2 Cell Organisation (Structured Question 1 & 2)


Question 1:
Diagram below shows four levels of cell organization in humans.


(a)
Complete Table below by naming Level 2 and Level 3.


(b)(i)
The cells undergo process P to become specific cells that perform a specific function.
Name process P.
(ii) What is the function of the structure in level 2?
(iii) The structure in level 4 is one of the body systems.
Name this system.
(iv) State one function of the system in (b)(iii).
(c)(i) Name and explain the condition which can cause a blockage in blood vessel W.
(ii) A person is suffering from the condition in (c)(i).
State three effects on the person’s health.



Answer:
(a)
Level 2: Tissue
Level 3: Organ

(b)(i)
Process P: Differentiation

(b)(ii)
Function: able to contract and relax to pump the blood

(b)(iii)
Blood circulatory system

(b)(iv)
Transport oxygen, nutrients and antibodies

(c)(i)
Thrombosis – Deposition of cholesterol inside the lumen of a blood vessel which clogs the blood vessel.
Or
Embolism – Movement of cholesterol inside a blood vessel which clogs the blood vessel and leads to thrombosis.
Or
Arteriosclerosis – Deposition of cholesterol/ fat/ calcium inside the lumen of a blood vessel which cause narrowing of the lumen and leads to clogging.

(c)(ii)
1. Chest pain
2. Stroke
3. Heart attacks


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