1.4 Transportation of Oxygen

Question 1

what is myoglobin

Answer 1

an oxygen binding protein found in muscle tissue

Question 2

what is the dissociation curve

Answer 2

a graphical representation of the rate at which oxygen separates from haemoglobin and diffuses into the muscle cells

Question 3

what is sarcoplasm

Answer 3

holds organelles in muscle cells

Question 4

what is the Bohr Shift

Answer 4

The shift to the right that the dissociation curve makes during exercise

Question 5

what is Hb

Answer 5

haemoglobin

Question 6

Hb + O2 =

Answer 6

HBO2 (oxyhaemoglobin)

Question 7

what’s the difference between myoglobin and haemoglobin

Answer 7

• found in muscles
• quick release of oxygen
• larger stores of Mb in fibres
• higher affinity to O2 than Hb

Question 8

why does oxyhaemoglobin become oxymyoglobin

Answer 8

Due to the **low pressure of oxygen **at the muscle tissues, the oxygen will release itself from the haemoglobin and diffuse into the muscle cells. In the muscle cells, myoglobin will be present, which stores oxygen and allows it to be used quickly for energy production. Aerobic respiration will then take place at the mitochondria.

Question 9

what does the oxygen dissociation curve look like

Answer 9

Question 10

what does the Bohr Shift look like

Answer 10

Question 11

reasons for an increase of oxygen dissociation (Bohr Shift)

Answer 11

• increase in blood temp
• partial pressure of CO2 increases
• increase in lactic acid decreases the pH level of the blood, so blood is more acidic