respiration

Question 1

what is respiration

Answer 1

Chemical reactions that break down nutrient molecules in living cells to release energy. Respiration involves the action of enzymes in cells

Question 2

use of energy in the body of humans

Answer 2

muscle contraction, protein synthesis, cell division, active transport, growth, the passage of nerve impulses and the maintenance of a constant body temperature.

Question 3

what is aerobic respiration

Answer 3

Release of a relatively large amount of energy in cells by the breakdown of food substances in the presence of oxygen.

Question 4

equations for aerobic respiration

Answer 4

G
l
u
c
o
s
e
\+
o
x
y
g
e
n
→
c
a
r
b
o
n
d
i
o
x
i
d
e
\+
w
a
t
e
r
C
6
H
12
O
6
\+
6
O
2
→
6
C
O
2
\+
6
H
2
O

Question 5

what is anaerobic respiration

Answer 5

Release of a relatively small amount of energy by the breakdown of food substances in the absence of oxygen.

Question 6

anaerobic respration equations in muscles

Answer 6

Glucose → lactic acid

C6H12O6 → 2 C3H6O3

Question 7

anaerobic respiration equations in yeast

Answer 7

Glucose → ethanol + carbon dioxide

C6H12O6 → 2C2H5OH + CO2

Question 8

disadvantages of anaerobic respiration

Answer 8

Only produces 1/20 of the energy per glucose molecule that aerobic respiration would

Produces poisonous lactic acid

Question 9

what is lactic acid

Answer 9

Transported in blood to heart, liver and kidneys, which oxidize it

The heart, liver and kidneys need extra oxygen to do this which causes you to continue breathing heavily after exercise.

The extra oxygen is called the oxygen debt.