Exercise and Heart Rate

Question 1

What do muscle cells do when your body exercises?

Answer 1

Respire more than they do at rest

Question 2

During exercise what 2 things must the body do to help the muscles with their increased respiration?

Answer 2

1. Deliver oxygen and glucose to them more quickly

2. Remove waste carbon dioxide more quickly

Question 3

How does the body manage to do the things that help the muscles respire more, and why (short)? (3)

Answer 3

1. Increased heart rate (pumps blood to transport useful/ waste materials)
2. Increased rate of breathing (more O, less CO2)
3. Increased depth of breathing (see above)

Question 4

What does increased heart rate do?

Answer 4

It increases rate of blood flow so oxygen (and glucose?) are transported to the muscles more quickly and carbon dioxide is removed more quickly

Question 5

What does increased rate and depth of breathing do?

Answer 5

They increase the rate of gaseous exchange in lungs

Question 6

What do muscles store glucose as?

Answer 6

glycogen

Question 7

What can the muscles do with the glycogen during exercise, and why would they do this?

Answer 7

Convert it back to glucose to use to respire during the exercise

Question 8

Where is most of the body’s glycogen supply stored?

Answer 8

In the liver (but all muscles have some too)

Question 9

What is important to remember about glucose, plants, and animals?

Answer 9

Animals store glucose as glycogen

Plants store glucose as starch

Question 10

What’s the difference between breathing and respiration?

Answer 10

Respiration releases energy, while breathing allows air in and out of the lungs

Question 11

What happens to the rate of glucose the body uses when it exercises?

Answer 11

It increases rapidly.