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 into the muscles 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

What: movement of the line on the graph to the right

Why: shows the result of increase in blood acidity = lower PH levels (co2 levels)

How: Hb releasing o2 more easily (for the muscles when required)

When: during exercise