Passive Transport – Transport Across Cell Membranes
Über den Vortrag
Der Vortrag „Passive Transport – Transport Across Cell Membranes“ von Georgina Cornwall, PhD ist Bestandteil des Kurses „Cellular Structure“.
Quiz zum Vortrag
Which of the following best describes passive transport across cell membranes?
- Molecules move down the concentration gradient with zero energy expenditure.
- Molecules move down the concentration gradient by using one ATP for each molecule transferred.
- Molecules move up the concentration gradient with zero energy expenditure.
- Molecules move in either direction and independently of a concentration gradient.
- Molecules move up the concentration gradient by using one ATP for each molecule moved.
Which of the following is required for facilitated diffusion?
- Participation of carrier or channel proteins
- Participation of peripheral proteins
- Participation of phospholipid molecules
- Participation of hydrophobic molecules
- Participation of the hydrophilic heads of phospholipids
Which statement is INCORRECT about facilitated diffusion across the plasma membrane?
- The rate of facilitated diffusion of glucose across the cell membrane is directly dependent on the number of ATP molecules hydrolyzed during the movement of glucose molecules.
- Facilitated diffusion does not utilize any energy during the transfer of molecules from the exterior to the interior of the cell.
- Conformational changes in the carrier proteins of gated channels lead to the opening and closing of gated channels.
- Carrier proteins or gated channels provide a selective aqueous passage for hydrophilic and larger molecules.
- During facilitated diffusion, molecules move down their concentration gradients across the cell membrane.
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Dozent des Vortrages Passive Transport – Transport Across Cell Membranes
Georgina Cornwall, PhD
Dr. Georgina Cornwall is a Biology Instructor and currently works as an Instructional Designer in the private sector, developing interactive online training materials.
She obtained her PhD in Environmental, Population, and Organismic Biology at the University of Colorado, USA, in 2000, and has since taught a broad array of biology courses at various US universities.
She is an active promoter of hybrid/online teaching formats and interactive courses, and has received several awards for her engaging and innovative course design; e.g., she was named Adjunct Faculty of the Year at Colorado Mountain College in Aspen twice.
Within Lecturio, Dr. Cornwall teaches courses on Biology & Genetics.
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Easy to understand.I like how she uses examples to illustrate passive vs. active transport.
very good, is complicated, but i understand everything, she is a good teacher
couldnt understand a thing. Please try to use animation to explain better
