Get premium membership and access questions with answers, video lessons as well as revision papers.
How oxygen is transported in the blood
oxygen concentration is higher in lungs(alveoli) that in blood
oxygen in the alveoli dissolves in the film of moisture and diffuses through thin epithelial and capillary walls into plasma and red blood cells
the oxygen combines with haemoglobin to form oxyhaemoglobin
blood then becomes oxygenated
blood from lungs then travels to all body tissues where the oxyhaemoglobin breaks down to form oxygen and haemoglobin
haemoglobin is transported back to the lungs to collect more oxygen while the oxygen in capillaries diffuses into body cells for respiration
respiration produces carbon IV oxide
How Carbon IV Oxide is transported in the blood
carbon IV oxide produced during respiration diffuses out of cells into blood plasma and red blood cells due to concentration gradient
carbon IV oxide and water fonn carbonic acid carbamino compounds with haemoglobin
in the presence of carboxyl anhydrase enzyme, hydrogen carbonate is carried in blood to the lungs
in the lungs the hydrogen carbonate dissociates to liberate carbon IV oxide which diffuses into alveolar cavity due to concentration gradient
from alveolar space carbon IV oxide is expelled during expiration
Most carbon IV oxide is transported from tissues to lungs within the red blood cells and not in the blood plasma. Give the advantages of this mode of transport.
PH of blood is not altered/homeostasis is maintained
Within the red blood cell is an enzyme, carbonic anhyrase which helps in fast loading(combining) and offloading of carbon (iv) oxide
Mohaissack answered the question on October 5, 2017 at 11:03
- How does the heart increase blood flow to some parts of the body during exercise(Solved)
How does the heart increase blood flow to some parts of the body during exercise
Date posted: October 5, 2017. Answers (1)
- State the functional differences between a red blood cells and a White blood cells(Solved)
State the functional differences between a red blood cells and a White blood cells
Date posted: October 5, 2017. Answers (1)
- Describe how cervical lumbar on sacra vertebrae are suited to their function (Solved)
Describe how cervical lumbar on sacra vertebrae are suited to their function
Date posted: October 5, 2017. Answers (1)
- State the Ways in which the red blood cells are adapted to their functions(Solved)
State the Ways in which the red blood cells are adapted to their functions
Date posted: October 4, 2017. Answers (1)
- Describe how mammalian blood components carry out their functions (Solved)
Describe how mammalian blood components carry out their functions
a.Plasma
b.Red blood cells(Erythrocytes)
c. White blood cells(Leucocytes)
d. Blood platelets(Thrombocytes)
Date posted: October 4, 2017. Answers (1)
- State the functions of mammalian blood(Solved)
State the functions of mammalian blood
Date posted: October 4, 2017. Answers (1)
- Give the reasons why pressure of blood is greater in the arteries than in the veins of mammals(Solved)
Give the reasons why pressure of blood is greater in the arteries than in the veins of mammals.
Date posted: October 4, 2017. Answers (1)
- State the ways in which the composition of blood in the pulmonary arterioles differs from that in the pulmonary venules(Solved)
State the ways in which the composition of blood in the pulmonary arterioles differs from that in the pulmonary venules
Date posted: October 4, 2017. Answers (1)
- Describe the structure and functions of the blood vessels(Solved)
Describe the structure and functions of the blood vessels
i. Arteries
ii. Cappilaries
iii. Veins
Date posted: October 4, 2017. Answers (1)
- Explain why blood leaving the lungs may not be fully oxygenated(Solved)
Explain why blood leaving the lungs may not be fully oxygenated
Date posted: October 4, 2017. Answers (1)
- Explain how the mammalian heart is adapted to performing its functions(Solved)
Explain how the mammalian heart is adapted to performing its functions
Date posted: October 4, 2017. Answers (1)
- Describe the structure and function of the mammalian heart(Solved)
Describe the structure and function of the mammalian heart
Date posted: October 4, 2017. Answers (1)
- Distinguish between single circulatory system and double circulatory system(Solved)
Distinguish between single circulatory system and double circulatory system
Date posted: October 4, 2017. Answers (1)
- What are the advantages of the closed circulatory system over open circulatory system?(Solved)
What are the advantages of the closed circulatory system over open circulatory system?
Date posted: October 4, 2017. Answers (1)
- List the components of animal transport systems(Solved)
List the components of animal transport systems
Date posted: October 4, 2017. Answers (1)
- Describe an experiment you would carry out in order to demonstrate that phloem transports manufactured food substances in a plant(Solved)
Describe an experiment you would carry out in order to demonstrate that phloem transports manufactured food substances in a plant
a. Ringing Experiment
b. Use the radio-tracers
c. Collecting exudate from stylets of aphids
Date posted: October 4, 2017. Answers (1)
- Explain how aquatic and terrestrial plants are adapted to deal with problems of transpiration
(Solved)
Explain how aquatic and terrestrial plants are adapted to deal with problems of transpiration
a. Mesophytes
b.Xerophytes
c.Hydrophytes
Date posted: October 4, 2017. Answers (1)
- State the importance of transpiration to plants(Solved)
State the importance of transpiration to plants
Date posted: October 4, 2017. Answers (1)
- Name the sites through which transpiration takes place in a plant(Solved)
Name the sites through which transpiration takes place in a plant
Date posted: October 4, 2017. Answers (1)
- Name the transport structures of a flowering plant(Solved)
Name the transport structures of a flowering plant
Date posted: October 4, 2017. Answers (1)