Respiratory system Flashcards
What is the mechanics of breathing, exhaling ?
Passive proves when at Rest
Diaphragm relaxes and moves up
External intercostal muscles relax and move down and in
Volume decreases
Pressure increases
Pressure gradient created- partial vacuum and air moves out
In the mechanics of breathing, how do you inhale ?
Diaphragm - contracts and flattens
External intercostal muscles- contract, rib cage moves UP and OUT
Volume increases
Pressure decreases
Air moves into lungs- a partial vacuum is created
High pressure- low pressure
Gas exchange at the alveoli
Look at diagram
What is anaerobic respiration?
Breakdown of glucose in the absence of oxygen
Occurs in the cytoplasm
Glucose= 2ATP + lactic acid
Anaerobic respiration is AKA?
Glycolysis !
Aerobic respiration??
Breakdown remains of glucose in the presence of oxygen
Occurs in mitochondria
Glucose and water gives water and energy and carbon dioxide
How many potential atp can be produced from aerobic respiration?
38
The Krebs cycle or the citric acid cycle ??
When two pyruvate molecule enter the Krebs cake and are broken down to release enough energy to produce 2 ATP molecules
What is the electron transport system?
Products of the Krebs cycle enter the electron transport system, releasing enough energy to produce up to 34 ATP molecules
What happens in the anaerobic stage of cell respiration ?
- One glucose molecule is broken down into two pyruvate molecules
- Enough energy to make two ATP
- No O2 present = pyruvate is converted into lactic acid, Body goes into O2 debt , recovery O2.
When there is no O2 in anaerobic respiration, what happens?
Turns to lactic acid goes to live, recovery O2 is formed which then converts back into a pyruvate
What happens in aerobic respiration??
The pyruvate enters the mitochondrial inner later where the enzyme, acetyl coA is present.
