HARD
AS and A Level
IMPORTANT
Earn 100
The most abundant plasma protein is albumin. Why it is important that the capillary walls are not permeable to this protein?
Important Questions on Transport in Mammals
HARD
AS and A Level
IMPORTANT
The disease Kwashiorkor is caused by diet which is very low in protein. The concentration of proteins in blood plasma is much lower than usual. One of the symptoms of Kwashiorkor is the swelling caused by build-up of tissue fluid. Suggest why this is so?
HARD
AS and A Level
IMPORTANT
Assuming that you have 2.5 1013 red blood cells in your body, that the average life of a red blood cell is 120 days, and that the total number of red blood cells remains constant, calculate how many new red blood cells must be made, on average, in your bone marrow each day.
HARD
AS and A Level
IMPORTANT
Whether the following function could or could not be carried out by red blood cells. Briefly Justify your answer.
Protein synthesis
HARD
AS and A Level
IMPORTANT
Whether the following function could or could not be carried out by red blood cells. Briefly Justify your answer.
Lipid synthesis
HARD
AS and A Level
IMPORTANT
Whether the following function could or could not be carried out by red blood cells. Briefly Justify your answer.
Cell Division
HARD
AS and A Level
IMPORTANT
Whether the following function could or could not be carried out by red blood cells. Briefly Justify your answer.
Active transport
HARD
AS and A Level
IMPORTANT
In a healthy adult human, there is about 150 gm of haemoglobin in 1 dm3 of blood. 1 gm of haemoglobin combines with 1.3 dm3 of oxygen at body temperature. Calculate how much oxygen can be carried by 1dm3 of blood.
HARD
AS and A Level
IMPORTANT
At body temperature, the solubility of oxygen in water is approximately 0.025 cm3 of oxygen per cm3 of water. Assuming that the blood plasma is mostly water, how much oxygen could be carried in 1 dm3 of blood if there was no haemoglobin?
