Ventilation in Mammals

Beschreibung

A level Biology (3.1.1 Exchange Surfaces) Karteikarten am Ventilation in Mammals, erstellt von Yinka F am 31/01/2018.
Yinka F
Karteikarten von Yinka F, aktualisiert more than 1 year ago
Yinka F
Erstellt von Yinka F vor fast 7 Jahre
7
0

Zusammenfassung der Ressource

Frage Antworten
What does ventilation consist of? Inspiration Expiration
What is ventilation controlled by? It is controlled by the movements of the diaphragm, intercostal muscles and ribcage
What happens during inspiration? External intercostal and diaphragm muscles contract Ribcage moves upwards and outwards, and diaphragm flattens, increasing volume of the throax Lung pressure decreases (below atmospheric pressure) Air flows into lungs
TRUE OR FALSE Inspiration is an active process TRUE It requires energy
What happens during expiration? External intercostal and diaphragm muscles relax Ribcage moves downwards and inwards, and diaphragm becomes curved again, decreasing thorax volume Lung pressure increases Air is forced out of the lungs
TRUE OR FALSE Expiration is an active process FALSE It is a passive process - does NOT require energy
What happens during forced expiration? The inner intercostal muscles contract to pull the ribcage down and in
How does a spirometer work? A spirometer has an oxygen-filled chamber with a movable lid. As the person breathes in and out, the lid of the chamber moves up and down. A pen attached to the lid writes on a rotating drum, creating a spirometer trace. Soda lime in the tube absorbs CO₂
What is tidal volume? Volume of air in each breath (usually 0.4dm³)
What is vital capacity? Maximum volume of air that can be breathed in or out
What is breathing rate? How many breaths are taken per unit time (usually per minute)
What is oxygen uptake? Rate at which a person uses up oxygen (e.g. the number of dm³ used per minute)
Complete the sentences: The total volume of gas in the chamber __________ over time; the air that is breathed out is a mixture of _____ and ____. The CO₂ is absorbed by the _____ _____, the oxygen gets used up by respiration and the total _________ decreases. The total volume of gas in the chamber DECREASES over time; the air that is breathed out is a mixture of O₂ and CO₂. The CO₂ is absorbed by the SODA LIME, the oxygen gets used up by respiration and the total VOLUME decreases.
What must be done to get a valid reading? The person must wear a nose clip The machine must be airtight
What does a spirometer trace look like?
How is oxygen uptake measured? Oxygen uptake is the decrease in the volume of gas in the spirometer chamber
TRUE OR FALSE: On a spirometer trace, upwards = breathing out TRUE
Zusammenfassung anzeigen Zusammenfassung ausblenden

ähnlicher Inhalt

Biology- Genes, Chromosomes and DNA
Laura Perry
Biology- Genes and Variation
Laura Perry
Enzymes and Respiration
I Turner
GCSE AQA Biology 1 Quiz
Lilac Potato
GCSE Biology AQA
isabellabeaumont
AQA Biology 8.1 structure of DNA
Charlotte Hewson
The Circulatory System
Shane Buckley
Biology Unit 2 - DNA, meiosis, mitosis, cell cycle
DauntlessAlpha
Cell Transport
Elena Cade
Function and Structure of DNA
Elena Cade
Biological Molecules Definitions
siobhan.quirk