Question

question 8 (2.5 points)
how does cell volume affect nutrient exchange between the cell and its external environment?
very large cells are the best adapted for nutrient exchange
very small cells are the best adapted for nutrient exchange
nutrient exchange is not impacted by cell volume
the ratio of cell volume to surface area determines the efficiency of nutrient exchange
cells with a large volume and small surface area are well - adapted for nutrient exchange
question 9 (2.5 points)
most of the active functions of plasma membranes are carried out by ____
cholesterol
proteins

Explanation:

For Question 8:

• Cell volume affects nutrient exchange. As cell volume increases, the surface - area - to - volume ratio decreases. Smaller cells have a higher surface - area - to - volume ratio, which allows for more efficient nutrient exchange (substances can diffuse across the membrane more effectively). The ratio of cell volume to surface area is crucial.

For Question 9:

• Plasma membranes have various components. Cholesterol mainly affects membrane fluidity. Proteins in the plasma membrane are involved in active functions such as transport (carrier and channel proteins for moving substances across the membrane), cell - cell recognition, and enzymatic activity.

Answer:

Question 8: The ratio of cell volume to surface area determines the efficiency of nutrient exchange.
Question 9: proteins.