BIOS 3450 Human Physiology | Plasma Membrane | Vol 2

Osmosis

Osmosis

Net diffusion of water through a membrane down its concentration gradient.

True or False: There’s lesser water concentration if there’s a higher solute concentration.

True.

True or False: There’s greater water concentration if there’s a higher solute concentration.

False.

True or False: There’s greater water concentration if there’s a lower solute concentration.

True.

In an immovable membrane, will a side of pure water diffuse into an impermeable solute?

The movement of osmosis builds the ______ in Dynamic equilibrium.

Hydrostatic pressure.

Osmolarity

Concentration of all solutes combined, expressed in number of particles per liter.

Osmolarity = Osm(ols)/L

Osmolarity Equation

Same Osmolarity as the inside of the cell.

Isotonic

Lesser Osmolarity than inside the cell.

Hypotonic

Higher Osmolarity than inside the cell.

Hypertonic

Carrier-Mediated Transport

Small to moderate-sized particles transport across the plasma membrane.

Vesicular Transport

Large particles transport across the membrane.

Endocytosis

Plasma membrane engulfs particles to form vesicle.

Exocytosis

Vesicle fuses with plasma membrane to release its contents

True or False: Endocytosis and Exocytosis are types of Vesicular transport.

True.

True or False: Endocytosis and Exocytosis are types of Vesicular transport.

False.