Homeostasis in Cells

Which homeostatic process requires energy to move particles across the plasma membrane?

• active transport

• passive transport

• dynamic equilibrium

• osmosis

Which homeostatic process moves particles against a concentration gradient?

• dynamic equilibrium

• passive transport

• osmosis

• active transport

Which statement describes the ability of the cell membrane to allow various substance to move through it?

• The cell membrane is selectively permeable.

• The cell membrane is composed of lipids and phosphates.

• The cell membrane is both hydrophilic and hydrophobic.

• The cell membrane is a bilayer structure.

Which best describes dynamic equilibrium?

• There is a difference in concentration on either side of the cell membrane.

• There is an uneven distribution of particles inside and outside the cell.

• Particles are moving into and out of the cell, but their concentrations remain stable.

• A concentration gradient is forcing water out of the cell and particles into the cell.

In which kind of solution is the concentration of solutes the same inside and outside of the cell?

• isotonic

• hypertonic

• hypotonic

• concentrated

Which process is characterized by the movement of particles from an area of high concentration to an area of low concentration across the plasma membrane without the use of energy?

• hypertonic transport

• active transport

• passive transport

• dynamic equilibrium

For diffusion to occur, which condition must be met?

• A concentration gradient must exist.

• A hypotonic external environment must exist.

• A hypertonic external environment must exist.

• Dynamic equilibrium must exist.

Which movement of particles would be most affected by a disorder that causes damage to carrier proteins?

• osmosis

• passive transport

• active transport

• diffusion

Which motion of particles across a membrane requires energy?

• from high concentration to low concentration

• from low concentration to high concentration

• with no concentration gradient

• through dynamic equilibrium

Which best describes the difference between osmosis and diffusion?

• Osmosis is the movement of particles from a high to a low particle concentration, while diffusion is the movement of water from a high to a low water concentration.

• Diffusion is the movement of particles from a high to low particle concentration, while osmosis is the movement of water from a high to a low water concentration.

• Diffusion is the movement of particles from a low to a high particle concentration, while osmosis is the movement of water from a low to a high water concentration.

• Osmosis is the movement of particles from a low to a high particle concentration, while diffusion is the movement of water from a low to a high water concentration.