Question

In active transport, there is a __________ that is reached at very high extracellular concentrations of solute. This is because solutes move through __________ during active transport. Since there is a __________ available in the cell membrane, they can only transport a __________ in a given time.

A) Saturation Point, Carrier Proteins, Limitation, Limited Amount
B) Equilibrium, Phospholipid Bilayer, Facilitation, Large Quantity
C) Threshold, Endocytosis, Expansion, Wide Range
D) Maximum, Ion Channels, Constraint, Small Quantity

Answer 1

In active transport, a saturation point is reached due to the finite number of carrier proteins in the cell membrane, which allows only a limited amount of solute to be transported at a time.

Step-by-step explanation:

In active transport, there is a saturation point that is reached at very high extracellular concentrations of solute. This occurs because solutes move through carrier proteins during active transport. Since there is a limitation available in the cell membrane, they can only transport a limited amount in a given time. Therefore, the correct answer to fill in the blanks would be: A) Saturation Point, Carrier Proteins, Limitation, Limited Amount.

Active transport requires energy, typically in the form of ATP, to move substances against their concentration gradient. There are a finite number of carrier proteins in the membrane; when they are all occupied with solute (saturated), increasing the extracellular solute concentration further does not increase the rate of transport. This process is essential for maintaining the necessary concentrations of ions and other substances vital for cell function.