Osmosis and Tonicity – Transport Across Cell Membranes
Über den Vortrag
Der Vortrag „Osmosis and Tonicity – Transport Across Cell Membranes“ von Georgina Cornwall, PhD ist Bestandteil des Kurses „Week 5 (Hashemite University - General Physiology)“.
Quiz zum Vortrag
What would happen to red blood cells if the plasma becomes hypertonic, secondary to extreme dehydration?
- Osmotic pressure would pull water out of the cells and they may shrivel.
- Osmotic pressure would draw water into the cells and they may lyse.
- No changes
- Red blood cells would expend energy to maintain their shape and function.
- The life span of cells would be shortened by half.
Which of the following best describes the mechanism of osmosis?
- Water molecules move across a semipermeable membrane from a region of lower solute concentration to a region of higher solute concentration.
- Amphiphilic molecules move across a semipermeable membrane from a region of normal solute concentration to a region of lower concentration.
- Hydrophobic molecules move across a semipermeable membrane from a region of lower concentration to a region of higher concentration.
- Water molecules move across a semipermeable membrane from a region of lower concentration to a region of higher concentration.
- Hydrophilic molecules move across a permeable membrane from a region of higher solute concentration to a region of lower solute concentration.
What is the driving force of osmosis?
- Osmotic pressure
- Atmospheric pressure
- Absolute pressure
- Vacuum pressure
- Gauge pressure
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Dozent des Vortrages Osmosis and Tonicity – 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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The pictures really help to understand these processes. Material about physics is usually boring for me but this time is was not so
not very engaging with the viewer, and it could be even more dynamic
