Dissolved Substances Flashcards
How can dissolved substances move in and out of cells ?
Through Diffusion, Osmosis, Active Transport
How does water move across boundaries (Cell Membrane) ?
Through Osmosis
What is Osmosis ?
This is the movement of water from a area of high concentration to a area of low concentration through a partially permeable.
What do differences in concentrations of solutions cause water to do?
This causes water to move in and out of the cells
What are tissue fluids filled with ?
Water with oxygen and glucose dissolved in it
Where is the tissue fluids found ?
They are found surrounding body cells
If a cell is short of water, what would happen to the solution.
The solution inside the cell would become more concentrated, encouraging the water to diffuse into the cell
How does the tissue fluid become filled with substances
The substances are squeezed out of the blood capillaries to supply cells.
What do most sport drinks contain ?
Water, with sugar and ions dissolved in it
Why do sport drinks contain sugars, water and ions ?
This is to replace the sugar used in energy release. the water and ions are needed to replace the ions and water lost through sweating.
What happens when ions and water are not replaced ?
The ion and water balance of the body is disturbed and the cells do not work efficiently
What is it when substances are absorbed against the concentration gradient ?
Active Transport
What does Active Transport require ?
This requires energy from respiration in the mitochondria
What is Active Transport
This is the movement of particles against the concentration gradient.
What does active transport enable cells to do?
They enable cells to absorb ions from dilute solutions
