Respiration

Question 1

Respiration releases energy...

Accepted Answer

to build up larger molecules (proteins) from smaller molecules (amino acids)

Accepted Answer

to allow muscles to contract in animals

Accepted Answer

so animals can maintain a constant body temperature

Accepted Answer

so plants can build sugars, nitrates and other nutrients into amino acids where they are then built into proteins

Answer

because it's fun

Answer

so we can breathe

Question 2

When doing physical activity, your breathing rate increases and you breathe more deeply for maximum oxygen intake to be supplied to your muscles

Answer

true

Question 3

Your heart pumps faster during excercise so more blood and thus oxygen can be pumped to your muscles

Answer

true

Question 4

Glycogen..

Accepted Answer

some glucose is stored from food as glycogen

Accepted Answer

glycogen is mainly stored in the liver

Accepted Answer

muscles have their own store

Accepted Answer

muscles use glucose vigorously during exercise so some of the glucose stored as glycogen is reconverted back into glucose for respiration

Answer

glucose breaks down into glycogen

Answer

glycogen combines with oxygen in respiration

Question 5

Anaerobic respiration happens only when your asleep

Answer

true

Question 6

Anaerobic respiration is the incomplete breakdown of glucose due to insufficient oxygen supply to your muscles, with the equation..

Accepted Answer

glucose -> lactic acid (+ a little energy)

Answer

glucose -> oxygen + lactic acid (+ a little energy)

Answer

glucose -> carbon dioxide + lactic acid (+ a little energy)

Answer

glucose -> lactic acid (+ a lot of energy)

Question 7

"Oxygen debt" is when...

Accepted Answer

you have to "repay" the oxygen that you didn't get to your muscles during exercise because your lungs couldn't keep up with the demand

Answer

you don't have any oxygen in your bloodstream

Answer

when you're suffocating

Answer

when you have such little oxygen in your muscles that they cannot work any longer

Question 8

lactic acid is removed by..

Accepted Answer

oxidising it to harmless CO2 and water

Answer

passing it out through the blood stream

Answer

breathing it out

Answer

waiting until your heartrate is normal

Question 9

While high levels of CO2 and lactic acid are detected in the blood, your breathing and heart rate stay high to rectify the situation

Answer

true

Question 10

mitochondria help make proteins by

Accepted Answer

provided the energy required for protein synthesis

Answer

where protein synthesis takes place

Preguntas del test (10)