Biology Chapter on Transport Processes

Questions and Answers

Which of the following is NOT a passive process?

Osmosis

Facilitated diffusion

Vesicular transport (correct)

Filtration

When the solutes are evenly distributed throughout a solution, we say the solution has reached _______.

equilibrium

Which of the following does NOT describe the plasma membrane?

Impermeable (correct)

Selectively permeable

Semipermeable

Differentially permeable

Which of the following requires a membrane-bound carrier for transport?

Facilitated diffusion Signup and view all the answers

Which of the following statements about carrier proteins is FALSE?

They assist in simple diffusion. Signup and view all the answers

Which of the following statements about facilitated diffusion is FALSE?

The movement of a given solute usually occurs in both directions (into and out of the cell). Signup and view all the answers

Which of the following is NOT a reason why a solute would require facilitated diffusion?

The solute directly requires ATP for its transport. Signup and view all the answers

Which of the following would increase the rate of facilitated diffusion?

Increasing the steepness of the concentration gradient Signup and view all the answers

Which of the following statements about osmosis is FALSE?

Water moves toward the solution with the lowest concentration of solutes. Signup and view all the answers

A hypertonic solution: _______.

Will induce cell shrinkage Signup and view all the answers

If a membrane is impermeable to solutes, which of the following is true?

Water will move toward the more concentrated solutes. Signup and view all the answers

Osmotic pressure is measured in units of _______.

mm Hg Signup and view all the answers

A __________ is a round or oval hole or opening.

foramen Signup and view all the answers

Study Notes

Active vs Passive Processes

Vesicular transport is the only process listed that is not passive.

Solution Dynamics

When solutes are evenly dispersed in a solution, it is termed equilibrium.

Plasma Membrane Characteristics

The plasma membrane is selectively permeable, semipermeable, and differentially permeable, but it is not impermeable.

Carrier Proteins and Transport

Facilitated diffusion requires a membrane-bound carrier for transport.
Carrier proteins assist in the facilitated diffusion process, not simple diffusion.
Carrier proteins can become saturated and may undergo slight shape changes to accommodate solutes.

Misconceptions in Facilitated Diffusion

It is false that the movement of a given solute in facilitated diffusion occurs in both directions; it is typically unidirectional.

Factors Requiring Facilitated Diffusion

Solutes needing facilitated diffusion include those that are lipid insoluble, too large, or hydrophilic, but not those directly requiring ATP for transport.

Enhancing Facilitated Diffusion

The rate of facilitated diffusion can be increased by steepening the concentration gradient.

Understanding Osmosis

It is incorrect to say that water moves toward the solution with the lowest solute concentration; it actually moves toward the area with the highest solute concentration.

Hypertonic Solutions

A hypertonic solution will cause cell shrinkage due to water moving out of the cell.

Membrane Permeability and Osmosis

If a membrane is impermeable to solutes, water will move toward more concentrated solutes to attempt to create equilibrium.

Osmotic Pressure Measurement

Osmotic pressure is quantified in millimeters of mercury (mm Hg).

Anatomical Terms

A foramen refers to a round or oval hole or opening.

Description

This quiz explores the differences between active and passive transport processes, focusing on vesicular transport and facilitated diffusion. Understand key concepts such as plasma membrane characteristics and the role of carrier proteins. Test your knowledge on common misconceptions related to solute movement in solutions.