An enzyme in red blood cells catalyses the reaction between carbon dioxide and water as the blood flows through the respiring tissues.
Explain the significance of this reaction in the transport of carbon dioxide.
Important Questions on Transport in Mammals
The graph below shows the effect of increasing the effect of carbon dioxide concentration.
State the percentage saturation of haemoglobin with oxygen at a partial pressure of 5 kPa of oxygen when the partial pressure of carbon dioxide is:
- 1.0kPa
- 1.5 kPa
Mammals have a closed double circulation. What is meant by the term double circulation.
Explain why the wall of artery is thicker than the vein?
Suggest one role for the precapillary sphincter shown in the figure.
The given image shows circulation in mammalian tissue.
With reference to this figure, describe the role of capillaries in the formation of tissue fluid.
The given figure shows the pressure changes in the left atrium, left ventricle and aorta throughout two cardiac cycles.
How long does one cardiac cycle last?
The given figure shows the pressure changes in the left atrium, left ventricle and aorta throughout two cardiac cycles.
What is the heart rate represented on this graph in beats per minute?
The given figure shows the pressure changes in the left atrium, left ventricle and aorta throughout two cardiac cycles. Make a copy of this diagram.
The contraction of the muscles in the ventricle wall causes the pressure inside the ventricle to rise. When the muscles relax, the pressure drops again.
In your copy of the diagram mark the time when the ventricle is contracting.
