Insect Exchange Flashcards Preview

Biology > Insect Exchange > Flashcards

Flashcards in Insect Exchange Deck (18)
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1
Q

Exoskeleton

A

less permeable
chiton (waxy)
waterproof

2
Q

where do insects live?

A

On land

3
Q

Why is this bad?

A

they can become easily dehydrated through water loss

4
Q

Adapted gas exchage surface?

A

for gas exchange and water loss

5
Q

Hairs

A

trap moist air outside the insect

6
Q

Spiracles

A

open and close

7
Q

Cuticle

A

thick
waxy
waterproof

8
Q

SA:V ratio?

A

relatively small SA:V ration

9
Q

Segmented Body

A

each segment has spiracles

10
Q

Gas movement in Spiracles?

A

gases move randomly in and out of spiracles by diffusion

11
Q

Trachea

A

big tube

12
Q

Tracheoles

A

small tube

13
Q

Insects gas exchange pathway

A
spiracles 
trachea 
strengthening rings 
tracheoles 
muscle
14
Q

large SA:V ratio

A

increases rate of exchange
small but waterproof
spiracles increase surface exposed to environment
many small branching tracheoles

15
Q

Short diffusion path

A

tracheoles in direct contact with respiring tissues

length of trachea/tracheoles limited by diffusion speed

16
Q

Movement of environmental medium

A

maintain concentration gradient
ventilation movements
muscles contrations refresh air within tracheoles

17
Q

Movement of internal medium

A

not applicable for gas exchange in insects

18
Q

Minimising water loss

A

waterproof covering spiracles closing hair