t4- respiration

Question 1

what 3 things do we use energy for

Answer 1

-building larger molecules from smaller ones
-muscular contraction
-maintaining body temperature

Question 2

what is metabolism

Answer 2

all the chemical reactions that occur in a living organism in order to maintain life

Question 3

describe aerobic respiration

Answer 3

-continuous
-used when there’s enough O2
-most efficient way to transfer energy from glucose

Question 4

describe anaerobic respiration

Answer 4

-glucose->lactic acid
-only used when we have to eg. when sprinting

Question 5

why don’t we always use anaerobic respiration

Answer 5

-lactic acid builds up which we have to remove
-incomplete breakdown of glucose as there’s no oxygen to oxidise it
-not unlocking all the energy from glucose

Question 6

which 3 things require energy from excercise

Answer 6

-muscular contractions
-rate of breathing increasing (as oxygen is required for cellular respiration)
-heart rate increasing (oxygen needs to be pumped around the body faster)

Question 7

describe lactic acid build up

Answer 7

-builds up in tissues
-more build up= more O2 needed to get rid
-leads to oxygen debt

Question 8

how to get rid of lactic acid build up

Answer 8

-react with O2
-blood carries lactic acid from muscles to liver
-liver reacts with O2 and converts it back to glucose