Save
biology- gas exchange
Save
Share
Learn
Content
Leaderboard
Share
Learn
Created by
rebecca blythe
Visit profile
Cards (56)
What is the relationship between surface area and volume in smaller single-celled organisms?
They have a high
surface
area
to
volume
ratio
View source
How do smaller single-celled organisms absorb oxygen?
By
diffusion
across their
body
surface
View source
What happens to carbon dioxide produced during respiration in single-celled organisms?
It
diffuses
out across the
body
surface
View source
Why is gas exchange harder when there is low oxygen?
Because
diffusion rates
decrease with low
concentration
View source
What structures do insects use for gas exchange?
Tracheae
and
tracheoles
View source
How are tracheae supported in insects?
By
strengthened
rings
to prevent
collapsing
View source
What is the function of tracheoles in insects?
They extend throughout all
body tissues
View source
How does atmospheric air reach respiring tissues in insects?
Through a short
diffusion pathway
from
tracheoles
View source
What is a spiracle in insects?
A
tiny
pore
for
gas entry
View source
When does a spiracle close in insects?
When the insect is
inactive
or
hot
View source
How does gas movement occur in the tracheal system of insects?
Along a
diffusion gradient
View source
What happens to oxygen concentration in tracheoles during respiration?
It
falls
as
oxygen
is
used
up
View source
How does carbon dioxide move in the tracheal system?
It
diffuses
out in the
opposite
direction
View source
What is mass transport in the context of insect respiration?
Contraction
of muscles squeezing
tracheae
View source
What happens to water in tracheoles during major activity?
It moves into
muscle
cells by
osmosis
View source
Why can't there be 'giant insects'?
Because
diffusion
limits their size
View source
How are fish gills adapted to maximize gas exchange?
Large
surface
area
with many
filaments
Short
diffusion pathway
with
thin
walls
Maintained
concentration gradient
Countercurrent
flow of
water
and
blood
View source
What is ram ventilation in fish?
Swimming with
mouth
open
for
water
flow
View source
How does water enter a fish?
Through the
mouth
when it
opens
View source
What happens when a fish closes its mouth?
The
operculum
opens to release
water
View source
What adaptations do gill filaments have for gas exchange?
Large
surface area
and many
capillaries
View source
How is a concentration gradient maintained in fish gills?
By
continuous flow
of
water
and
blood
View source
What is the countercurrent system in fish gills?
Water
and
blood
flow in
opposite
directions
View source
Why is equilibrium never reached in fish gills?
Because
oxygen
constantly
diffuses
in
View source
How does abdominal pumping increase gas exchange efficiency in insects?
It brings
air
directly to
respiring tissues
View source
How do small insects obtain sufficient oxygen without abdominal pumping?
By having a larger
surface area to volume ratio
View source
What is the frequency of spiracle opening in the insect at rest?
7
times per
minute
View source
Why does an insect open its spiracles less in dry conditions?
To prevent
water
loss
while taking in
oxygen
View source
What happens to the ends of tracheoles during flight?
Water is
absorbed
into
muscle
tissue
View source
How does the removal of water from tracheoles affect gas diffusion?
It
increases
the rate of
diffusion
of
oxygen
View source
What is the formula for calculating surface area to volume ratio?
SA:V ratio =
surface
area
/
volume
View source
How does metabolic rate relate to body mass?
Higher
mass
generally means
higher
metabolic
rate
View source
Why do smaller animals have a higher basal metabolic rate per unit mass?
Due to higher
surface area to volume ratio
View source
What are the adaptations of the alveoli for gas exchange?
Large
surface area
Thin walls (one
cell thick
)
High
concentration
gradient
maintained
Rich
blood
supply
View source
What is the role of the diaphragm during inhalation?
It
contracts
and
flattens
to increase
lung volume
View source
What occurs during exhalation?
Diaphragm
relaxes,
increasing lung
pressure
View source
What is pulmonary ventilation?
Total
air
moved into
lungs
per minute
View source
How is the pathway of an oxygen molecule described?
Across
alveolar
epithelium
and
capillary
endothelium
View source
What is the significance of the alveolar epithelium being one cell thick?
It
shortens
the diffusion pathway for gases
View source
What happens to the pressure in the lungs during inhalation?
It
decreases
as lung volume
increases
View source
See all 56 cards
See similar decks
Gas exchange
Biology
80 cards
gas exchange
biology
53 cards
gas exchange
biology
49 cards
exchange 🌱
biology
235 cards
Gas exchange
Biology
1 card
Gas exchange
Biology
25 cards
Exchange & Transport
Biology
466 cards
gas exchange
Biology
88 cards
Gas Exchange
Biology
49 cards
Gas Exchange
Biology
119 cards
gas exchange
biology
46 cards
Biology gas exchange
35 cards
Gas Exchange
Biology
146 cards
gas exchange
Biology
3 cards
Gas Exchange
Biology
121 cards
Gas Exchange
Biology
28 cards
Biology- Gas exchange
55 cards
gas exchange
biology
33 cards
gas exchange
biology
34 cards
Gas exchange
Biology
10 cards
Gas exchange
Biology
46 cards