
The diagram shows a section through the pancreas showing an islet of Langerhans.

Identify the structure that show that the pancreas is both an exocrine and an endocrine gland.


Important Questions on Data-Based and Practical Questions (Human Physiology)
A factor which adapts organisms to survive under low oxygen conditions is the presence of a substance in red blood cells called diphosphoglycerate (DPG). It affects the percentage saturation of hemoglobin as shown in the graph.
(a) Identify the effect of DPG on hemoglobin saturation.

A factor which adapts organisms to survive under low oxygen conditions is the presence of a substance in red blood cells called diphosphoglycerate (DPG). It affects the percentage saturation of hemoglobin as shown in the graph.
(b) Suggest with a reason the DPG levels in organism living at high altitude.
