module 3 exchange and transport alevel biology

studied byStudied by 1 person
0.0(0)
learn
LearnA personalized and smart learning plan
exam
Practice TestTake a test on your terms and definitions
spaced repetition
Spaced RepetitionScientifically backed study method
heart puzzle
Matching GameHow quick can you match all your cards?
flashcards
FlashcardsStudy terms and definitions

1 / 23

encourage image

There's no tags or description

Looks like no one added any tags here yet for you.

24 Terms

1

3 main factors that affect the exchange system ?

size

surface area : volume

levels of activity

New cards
2

explain how size affects the exchange system ?

in smaller organisms such as single-celled organisms, diffusion is sufficient for gas exchange due to their high surface area to volume ratio.

Larger organisms require specialized systems to efficiently transport materials across longer distances.

New cards
3

explain how surface area to volume ratio affects the exchange system ?

A higher surface area to volume ratio allows for more efficient diffusion of substances, enabling faster exchange of gases and nutrients.

larger organisms have a lower ratio, necessitating specialized structures or systems to facilitate adequate exchange.

New cards
4

explain how the level of activity affects the exchange system ?

Higher levels of activity increase the demand for oxygen and nutrients, requiring more efficient exchange systems to meet metabolic needs. Active organisms often have adaptations, such as larger respiratory surfaces or enhanced blood flow, to support their energy requirements.

New cards
5

what are the features of a good exchange system ?

large surface area,

thin barriers for diffusion,

a moist environment,

good blood supply to maintain concentration gradients,

ensuring efficient exchange of gases and nutrients.

New cards
6

describe the structure of the mammalian gaseous exchange system ?

the trachea made of rings of cartilage that prevent collapsing during inspiration

trachea branches into the bronchi, leading to bronchioles and alveoli

alveoli walls contain elastic fibres to allow stretch and recoil during inhalation and exhalation

the lungs are protected by the ribcage which are made of intercostal muscles and a diaphragm that aids in ventilation.

The alveoli provide a large surface area for gas exchange and are surrounded by capillaries to facilitate diffusion of oxygen and carbon dioxide.

New cards
7

how is the mammalian gaseous exchange system adapted ?

alveolus one cell thick (squamous epithelium tissue)

capillary walls one cell thick

capillaries are in close contact with alveolus walls

to maximize diffusion efficiency, enhancing gas exchange.

New cards
8

how is a good blood supply maintained within the mammalian exchange system ?

breathing movements ventilate the lungs by bringing in more o2 and removing co2 and ensures

conc of O2 in air of alveolus remains higher than in the blood

conc of CO2 remains lower in alveoli than in the blood

New cards
9

describe inhalation ?

diaphragm contracts down and becomes flattened

external intercostal muscles contract to raise ribcage

volume of thorax increases

thorax pressure decreases below atmospheric pressure

air moves into the lungs

New cards
10

describe exhalation

diaphragm relaxes and becomes dome shaped

external intercostal muscles relax and ribs fall

internal intercostal muscles contract to forcefully push more air out, usually only happens during exercise coughing or sneezing.

volume of thorax decreases

pressure in lungs increases

air moves out of the lungs

New cards
11

what are the tissue in the gaseous exchange system ?

lung tissue have alveoil

New cards
12
New cards
13
New cards
14
New cards
15
New cards
16
New cards
17
New cards
18
New cards
19
New cards
20
New cards
21
New cards
22
New cards
23
New cards
24
New cards

Explore top notes

note Note
studied byStudied by 18 people
1003 days ago
5.0(1)
note Note
studied byStudied by 13 people
971 days ago
5.0(1)
note Note
studied byStudied by 26 people
410 days ago
5.0(1)
note Note
studied byStudied by 87 people
15 hours ago
5.0(1)
note Note
studied byStudied by 2 people
7 days ago
5.0(1)
note Note
studied byStudied by 1679 people
284 days ago
5.0(3)
note Note
studied byStudied by 92 people
903 days ago
5.0(3)

Explore top flashcards

flashcards Flashcard (54)
studied byStudied by 12 people
349 days ago
5.0(1)
flashcards Flashcard (34)
studied byStudied by 13 people
555 days ago
5.0(1)
flashcards Flashcard (37)
studied byStudied by 18 people
834 days ago
5.0(1)
flashcards Flashcard (60)
studied byStudied by 11 people
823 days ago
5.0(1)
flashcards Flashcard (31)
studied byStudied by 11 people
833 days ago
5.0(1)
flashcards Flashcard (72)
studied byStudied by 13 people
704 days ago
5.0(1)
flashcards Flashcard (64)
studied byStudied by 97 people
836 days ago
5.0(6)
flashcards Flashcard (75)
studied byStudied by 41 people
8 days ago
5.0(1)
robot