Question

10
matching 1 point
match each of the following mechanisms of cellular transport with its correct definition.

secretory vesicles that have moved through the
along microtubules contact the plasma membr
release their contents
diffusion of molecules across the plasma memb
the assistance of transport proteins.
large particles are enveloped by the cell membr
internalized.
movement of water from a hypotonic solution int
hypertonic solution across a selectively permeabmembrane.
movement of a molecule from an area of high
concentration to an area of lower concentratio

Explanation:

1. Diffusion: Movement of a molecule from an area of high concentration to an area of lower concentration (passive, no energy/protein needed for small nonpolar molecules).
2. Phagocytosis: A type of endocytosis where large particles (like bacteria) are enveloped by the cell membrane and internalized (cell "eating").
3. Osmosis: Movement of water from a hypotonic (low solute) solution to a hypertonic (high solute) solution across a selectively permeable membrane.
4. Facilitated Diffusion: Diffusion of molecules across the plasma membrane with the assistance of transport proteins (passive, uses proteins for larger/polar molecules).
5. Exocytosis: Secretory vesicles move to the plasma membrane, fuse with it, and release their contents (used for secretion, like hormones/neurotransmitters).

Answer:

• Diffusion: Movement of a molecule from an area of high concentration to an area of lower concentration.
• Phagocytosis: Large particles are enveloped by the cell membrane and internalized.
• Osmosis: Movement of water from a hypotonic solution to a hypertonic solution across a selectively permeable membrane.
• Facilitated Diffusion: Diffusion of molecules across the plasma membrane with the assistance of transport proteins.
• Exocytosis: Secretory vesicles that have moved through the cytoplasm along microtubules contact the plasma membrane and release their contents.