F2 - SEM2 - Sensng the Environment - 10.1 Senses and Sense organs

Question 1

What is meant by Stimuli?

10.1 Senses and Sense organs

Answer 1

Environmental changes that cause living things to respond

10.1 Senses and Sense organs

Question 2

Why detect and respond to changes is important to living things?

10.1 Senses and Sense organs

Answer 2

1. find food
2. find mates
3. escape from danger

10.1 Senses and Sense organs

Question 3

Give an example how detect and respond to changes help living things to find food.

10.1 Senses and Sense organs

Answer 3

Hawk
see small animals that are far away and catch them

10.1 Senses and Sense organs

Question 4

Give an example how detect and respond to changes help living things to find mates.

10.1 Senses and Sense organs

Answer 4

Male polar bears
smell the scent left by female in their footprints
» follow this scent to find the females.

10.1 Senses and Sense organs

Question 5

Give an example how detect and respond to changes living things to escape from danger

10.1 Senses and Sense organs

Answer 5

Rabbits
hear sound made by their enemies far away
» run away quickly

10.1 Senses and Sense organs

Question 6

Which part of the body detect stimuli?

10.1 Senses and Sense organs

Answer 6

specialized sensory cells in different sense organs

10.1 Senses and Sense organs

Question 7

Describe how sense is produced

10.1 Senses and Sense organs

Answer 7

Stimula
» detected by specialized sensory cells in sense organ
» send message to brain
» produces sense

10.1 Senses and Sense organs

Question 8

List the 5 main sense organs of humans

10.1 Senses and Sense organs

Answer 8

• eye
• ear
• nose
• tongue
• skin

10.1 Senses and Sense organs

Question 9

What is stimuli and sense produced for eye, ear, nose and tongue?

10.1 Senses and Sense organs

Answer 9

eye: light > sight
ear: sound > hearing
nose: chemicals in air > smell
tongue: chemicals in food > taste

10.1 Senses and Sense organs

Question 10

What are stimulus and sense produced for skin?

10.1 Senses and Sense organs

Answer 10

touch (fur) > touch
pain > pain
pressure > pressure
temperature > hot, cold

things in contact with skin > touch, pressure, pain, hot and cold

10.1 Senses and Sense organs

Question 11

Give an example how animal can detect environment changes in different ways

10.1 Senses and Sense organs

Answer 11

Bats
detect object by emitting sounds and listening to echoes
allow them fly and hunt in the dark

10.1 Senses and Sense organs