5049637
Description
Flashcards by francesca graham, updated more than 1 year ago
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Created by francesca graham
over 8 years ago
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| Question | Answer |
| What are muscles made of? | Muscle cells |
| Where do muscles get their energy? | Glucose |
| What do muscles use energy for? | To contract the muscle |
| What does an increase of muscle activity require? | More glucose and oxygen |
| What needs to be removed from muscle cells? | Carbon dioxide |
| What 2 short term effects does exercise have on the body and why? | 1) Increased breathing rate to meat the increased demand for oxygen 2) Increased heart rate to help circulate oxygen and to take CO2 away |
| What substance is some of the glucose from food stored as? | Glycogen |
| Where is glycogen stored? | Mainly in the liver but each muscle has it's own store |
| What happens to some glycogen during vigorous exercise and why? | Some of the glycogen can get converted back into glucose as muscles can use up glucose quickly so it replaces the used up glucose |
| When does anaerobic respiration happen? | When there isn't enough oxygen present |
| What does "anaerobic" mean? | "Without oxygen" |
| What is the word equation for anaerobic respiration? | |
| Why isn't anaerobic respiration the best form of respiration (3 reasons)? | 1) Because it produces lactic acid which is painful 2) It causes muscle fatigue 3) It doesn't produce as much energy as aerobic respiration |
| Give one upside to anaerobic respiration. | It is good in emergencies. |
| What does anaerobic respiration result in? | Oxygen debt |
| What is oxygen debt? | The need to increase the amount of oxygen available to your muscles as they were deprived of enough oxygen earlier |
| What physical affect does oxygen debt have on your body? | It means that you have to keep breathing hard for a long time after exercise |
| What does lactic acid get converted into when it gets oxidised? | CO2 and water |
| Why does your breathing rate and pulse stay high after exercise (excluding oxygen debt)? | The brain detects high levels of CO2 and lactic acid |
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