Diagram below shows four levels of cell organization in humans.
(a) Complete Table below by naming Level 2 and Level 3. [2 marks]
(b)(i) The cells undergo process P to become specific cells that perform a specific function.
Name process P. [1 mark]
(ii) What is the function of the structure in level 2? [1 mark]
(iii) The structure in level 4 is one of the body systems.
Name this system. [1 mark]
(iv) State one function of the system in (b)(iii). [1 mark]
(c)(i) Name and explain the condition which can cause a blockage in blood vessel W. [3 marks]
(ii) A person is suffering from the condition in (c)(i).
State three effects on the person’s health. [3 marks]
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