Podcast
Questions and Answers
What happens to cells without cell walls in a hypertonic solution?
What happens to cells without cell walls in a hypertonic solution?
- They remain unaffected.
- They divide rapidly.
- They gain water and swell.
- They lose water and shrivel. (correct)
What is the primary function of transport proteins in facilitated diffusion?
What is the primary function of transport proteins in facilitated diffusion?
- To synthesize molecules inside the cell.
- To actively pump molecules against their concentration gradient.
- To degrade molecules outside the cell.
- To speed the passive movement of molecules across the plasma membrane. (correct)
What type of protein allows specific ions to cross the membrane?
What type of protein allows specific ions to cross the membrane?
- Carrier proteins
- Signal proteins
- Receptor proteins
- Channel proteins (correct)
What is the effect of a hypotonic solution on cells without cell walls?
What is the effect of a hypotonic solution on cells without cell walls?
What triggers the opening of gated channels in nerve cells?
What triggers the opening of gated channels in nerve cells?
What is the net direction of water diffusion in a hypertonic solution?
What is the net direction of water diffusion in a hypertonic solution?
What is the primary purpose of transport proteins in a cell membrane?
What is the primary purpose of transport proteins in a cell membrane?
What is the driving force behind the movement of particles during passive transport?
What is the driving force behind the movement of particles during passive transport?
What is the result of a substance diffusing down its concentration gradient?
What is the result of a substance diffusing down its concentration gradient?
What is the characteristic of a membrane that allows certain substances to pass through while restricting others?
What is the characteristic of a membrane that allows certain substances to pass through while restricting others?
What is the term for the movement of particles from an area of higher concentration to an area of lower concentration?
What is the term for the movement of particles from an area of higher concentration to an area of lower concentration?
What is the state in which the number of molecules crossing the membrane in one direction is equal to the number of molecules crossing in the other direction?
What is the state in which the number of molecules crossing the membrane in one direction is equal to the number of molecules crossing in the other direction?
What is the characteristic of facilitated diffusion in terms of energy requirement?
What is the characteristic of facilitated diffusion in terms of energy requirement?
What is the direction of solute movement in facilitated diffusion?
What is the direction of solute movement in facilitated diffusion?
What is the role of carrier proteins in facilitated diffusion?
What is the role of carrier proteins in facilitated diffusion?
What is the effect of facilitated diffusion on the solute concentration inside the cell?
What is the effect of facilitated diffusion on the solute concentration inside the cell?
What is the relationship between the binding and release of the transported molecule and the shape change of carrier proteins?
What is the relationship between the binding and release of the transported molecule and the shape change of carrier proteins?
What is the difference between facilitated diffusion and active transport in terms of energy requirement?
What is the difference between facilitated diffusion and active transport in terms of energy requirement?
