Question

Filtration is an example of:

A) passive transport
B) pinocytosis
C) phagocytosis
D) active transport

Answer 1

Filtration is considered passive transport, as it involves the movement of substances down their concentration gradient without the need for cellular energy.

Step-by-step explanation:

Filtration is an example of passive transport. This type of transport is characterized by the movement of substances from an area of higher concentration to an area of lower concentration without using cellular energy. Unlike active transport, which requires energy, usually in the form of ATP, to move substances against their concentration gradient, passive transport relies on natural diffusion or the movement of substances through a biological membrane with the concentration gradient.

Answer 2

Filtration is a type of passive transport, a process by which substances move across a membrane driven by pressure without the need for cellular energy.

Step-by-step explanation:

Filtration is an example of passive transport. In the context of cell biology, this process refers to the movement of substances across a membrane without the need for cellular energy (ATP), driven by the force of pressure. Passive transport includes several mechanisms such as diffusion, osmosis, and facilitated diffusion. Filtration specifically allows particles to pass through a permeable material, separating them based on size or other physical properties. Unlike active transport mechanisms like phagocytosis, pinocytosis, receptor-mediated endocytosis, and ion pumps, which require energy to move substances against their concentration gradient, filtration relies on passive means to move substances.