F2 Worksheet 11.1 answers

F.2 Integrated Science                                       11.1    Senses and sense organs

i      Words to know:

	English term	Write the words again	Chinese term
1	Sense organ	Sense organ	感覺器官
2	Stimuli	Stimuli	刺激
3	Respond	Respond	反應
4	Receptor	Receptor	感受器
5	Brain	Brain	腦

i      Fill in the blanks:

1        We can use our sense organs to detect changes in the environment.

2        Other living things can also detect changes in the environment (          stimuli) and respond to them.

3        By responding to stimuli, living things can find food, shelters, mates, detect and escape from danger.

4        Humans have different sense organs which can detect different stimuli.

5        Sense organs contain special kinds of cells called receptors which are sensitive to particular kinds of stimuli.

6        When the receptors detect stimuli, they send signals to our brain through nerves, which are then interpreted to give us senses.

i      Fill in the table:

Sense organ	Stimuli	Senses produced
Eye	light	sight
Ear	Sounds	hearing
Nose	Chemicals in air	Smell
Tongue	Chemicals in food or drinks	taste
Touch	Things in contact with our skin	Heat/cold, touch, pain, pressure