Cell Specialisation

Question 1

What are the 7 life processes?

Answer 1

Movement,
metabolism, 
respiration, 
growth, 
reproduction, 
response to stimuli, 
excretion

Question 2

Give an example of a specialised cell

Answer 2

Nerve cell: respond to stimuli by transmitting nerve impulses
red blood cell: transports oxygen and glucose to cells for respiration
white blood cell: defend the body against pathogens and cancer cells
sperm and egg cells: combine to produce offspring in the process of reproduction
muscle cells: contract and relax to allow movement of the body and its organs
liver cells: metabolise fats, carbohydrates and proteins.

Question 3

What is gene expression?

Answer 3

a composition of genes which codes for the synthesis of proteins. the structure and function of a cell is acquired during growth and depends on gene expression. All cells have the same genes but they can be switched on and off.

Question 4

What is a differentiated cell?

Answer 4

A cell which has developed a specialised structure and function, and produced from undifferentiated cells.

Question 5

give an example of an undifferentiated cell type

Answer 5

HEMATOPIETIC STEM CELL - red blood cells, macrophages, granulocytes, B cellls, T cells, Plasma cells.
NEUTRAL STEM CELL - neurons, glial cells.