Exercise

Question 1

Muscles are made of [ ] cells. What do they use to do what?

Answer 1

Muscle

They use oxygen to release energy from glucose (aerobic respiration), which is used to contract muscles

Question 2

What does an increase in muscle activity do?

Answer 2

Requires more glucose and oxygen to be supplied to the muscle cells. Extra carbon dioxide needs to be removed from the muscle cells. For this to happen the blood has to flow at a faster rate

Question 3

What does physical activity do to your body? (Rates)

Answer 3

Increases your breathing rate and makes you breathe more deeply to meet the demand for extra oxygen.
Increases the speed at which the heart pumps. (Heart rate)

Question 4

What is the difference between a fit person’s heart rate and an unfit person’s during physical activity?

Answer 4

unfit person’s heart rate goes up a lot more and they take longer to recover

Question 5

Some glucose from food is stored as [ ]

Answer 5

Glycogen

Question 6

Where is glycogen stored?

Answer 6

Mainly in the liver but each muscle has its own store

Question 7

During vigorous exercise muscles use glucose more rapidly, so some of the stored [ ] is converted back into [ ] to provide [ ].

Answer 7

glycogen
glucose
more energy