How do ion channels facilitate the movement of ions across the cell membrane, and what is an example of an ion that uses this method?

2.7 Facilitated Diffusion - Review

Explain the difference between channel proteins and carrier proteins in terms of their structure and function in passive transport.

Describe a scenario in which a cell might use a channel protein for passive transport. Include the type of molecule being transported and the conditions that make this transport necessary.

How do channel proteins ensure specificity in the molecules they transport across the cell membrane?

Compare and contrast the roles of channel proteins and carrier proteins in maintaining cellular homeostasis.

Why is passive transport through channel and carrier proteins considered to be energy-efficient for the cell?

Explain how glucose moves across the cell membrane and why it requires facilitated diffusion.

Describe the role of aquaporins in the facilitated diffusion of water molecules across the cell membrane.

How do ion channels facilitate the movement of ions across the cell membrane, and what is an example of an ion that uses this method?

What is the role of the GLUT4 transporter in muscle and fat cells, and how does it facilitate glucose uptake?

10.

Explain how amino acids are transported across the cell membrane and provide an example of a specific transporter involved in this process.

11.

Describe the process of facilitated diffusion and explain how it differs from simple diffusion.

12.

Explain how glucose uptake in cells is an example of facilitated diffusion.

13.

How does the concentration gradient affect the rate of facilitated diffusion?

14.

Why is facilitated diffusion important for maintaining cellular homeostasis?

15.

How do carrier proteins and channel proteins differ in their roles in facilitated diffusion?

You answeredJUST NOW

(Student response here)

Did you like this question?

(Voting helps us personalize your learning experience!)

Instructor solution

AI InstructorJUL 28, 2024, 8:14:29 AM

Ion channels are proteins that create specific pathways for ions to move across the cell membrane. These channels can be gated, opening in response to stimuli such as voltage changes or ligand binding. An example of an ion that uses facilitated diffusion through ion channels is potassium (K+), which moves through potassium channels to help maintain the cell's membrane potential.

Was this helpful?

(Voting helps us personalize your learning experience!)

Think you've got it?

Which ion commonly moves through ion channels via facilitated diffusion to help maintain membrane potential?

Select one of the following options:

A.
Chloride (Cl-)
B.
Calcium (Ca2+)
C.
Sodium (Na+)
D.
Potassium (K+)

Submit answer

Was this helpful?

(Voting helps us personalize your learning experience!)

Continue review

You may exit out of this review and return later without penalty.