1.4 Transportation of oxygen

Question 1

define the following terms: Hb, oxyhemoglobin, myoglobin, plasma, mitochondria

Answer 1

Hb = oxygen binding protein found in RBC
OxyHb = found when oxygen combines with Hb
myoglobin = oxygen binding protein found in muscle tissue
plasma = liquid part of the b.
mitochondria = part of the cell where respiration & energy production occur

Question 2

describe the transportation of o2 during exercise

Answer 2

• o2 attach to Hb
• oxyhemoglobin is formed and transported via the blood plasma to the working muscles
• due to low pressure of o2 at the muscle tissues, the o2 dissociates from Hb & diffuses into the muscle cells
• in the muscle cells, myoglobin is present, which stores o2 used quickly for energy production.
• aerobic resp. occurs at mitochondria

Question 3

what does the oxyhemoglobin dissociation graph show

Answer 3

relationship between o2 and Hb based on the partial pressure of o2

Question 4

what does the Bohr shift show ? why does this effect happen ?

Answer 4

movement of the line on the graph to the right

shows the result of increase in blood acidity

suggests that o2 is less willing to bind to Hb at low PH levels