B2.6.2 Flashcards
1
Q
During exercise if insufficient oxygen is reaching the muscles they
A
Use anaerobic respiration to obtain energy
2
Q
Anaerobic respiration is
A
The incomplete breakdown of glucose and produces lactic acid
3
Q
As the breakdown of glucose is incomplete
A
Much less energy is release than during aerobic respiration
4
Q
Anaerobic respiration results in
A
An oxygen debt that has to be repaid in order to oxidise lactic acid to carbon dioxide and water
5
Q
If muscles are subjected to long periods of vigorous activity they become
A
Fatigued
They stop contracting efficiently
6
Q
One of the causes of muscle fatigue is
A
The build-up of lactic acid in the muscles. Blood flowing through the muscles removes the lactic acid.
