ESTAS 4

Question 1

genetic engineering

Answer 1

changing the genetic material of an organism by removing, changing or inserting individual genes

Question 2

sustainable resource

Answer 2

one which is produced as rapidly as it is removed from the environment so that it does not run out

Question 3

sustainable development

Answer 3

development providing for the needs of an increasing human population without harming the environment

Question 4

stem cells

Answer 4

unespecialised cells that divide by mitosis to produce daughter cells that can become specialised for specific functions

Question 5

nerve impulse

Answer 5

an electrical signal that passes along nerve cells called neurones

Question 6

reflex action

Answer 6

means of automatically and rapidly integrating and coordinating stimuli with the responses of effectors (muscles and glands)

Question 7

passive immunity

Answer 7

short-term defence against a pathogen by antibodies acquired from another individual e.g. mother to infant

Question 8

clotting

Answer 8

conversion of fibrogen to fibrin to form a mesh

Question 9

coronary heart disease

Answer 9

blockage of coronary arteries.

risk factors: stress, smoking, genetic predisposition, age and gender.

Question 10

small intestine

Answer 10

the region for the absorption of digested food

Question 11

circulatory system

Answer 11

a system of blood vessels with a pump and valves to ensure one-way flow of blood