Question

One way that membrane surface area is increased is in absorptive cells through increasing the ________ of the apical membrane.

a) Thickness.
b) Rigidity.
c) Permeability.
d) Surface area.

Answer 1

One way to increase membrane surface area in absorptive cells is by increasing the surface area of the apical membrane, which can be achieved through the presence of microvilli. Microvilli are small, finger-like projections that increase the surface area available for absorption, enhancing nutrient uptake.

Step-by-step explanation:

In absorptive cells, one way to increase membrane surface area is by increasing the surface area of the apical membrane. This is achieved through the presence of structures called microvilli on the surface of the cell.

Microvilli are small, finger-like projections that extend from the cell's apical membrane. They effectively increase the surface area available for absorption, allowing for enhanced nutrient uptake.

For example, in the small intestine, microvilli increase the surface area for absorption of nutrients by diffusion.