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What causes rapid depolarization phase of a pacemaker cell?
Rapid depolarization happens after the membrane threshold has been reached and Na+ ions start to flow into the cell. As more Na+ ions flood in the cell becomes more and more positive. This causes the voltage gated Na+ channels to open creating a flood of Na+ ions and thus a rapid phase of depolarization. Shortly after this rapid phase K+ ions are released from the cell causing the cell to become more negative closing the Na+ channels and thus repolarizing the cell.
How does sickle cell anemia affect the muscular system?
The lack of blood flow or poor blood flow will cause problems when you need muscles the most.
When a cell is placed in a hypotonic solution will the flow of water be in or out of the cell?
The water will flow out of the cell.
What passes from the neuron to the muscle cells and what effect does it produce?
Acetylcholine (ACh) is the neurotransmitter that passes from neuron to muscle cells and it causes the Na/K channels to open allowing Na+ to flow into the cell triggering an action potential.
Would hypertonic or hypotonic blood serum cause hemolysis?
If a cell is placed into a hypotonic solution, the water will flow into the cell causing it to swell and possibly lyse. If a cell is placed into a hypertonic solution, the water will flow out of the cell causing it to crenate. So hemolysis occurs when the red blood cells lyse.
Which cell organelle regulates the flow of nutrients in and out of the cell?
The Cell membrane
Which cell can cytoplasm flow in?
The white blood cell.
What controls the materials flow in and out of the cell?
the cell membrane
What control the flow of substances in and out of a cell?
The cell membrane
The sodium-potassium pump transports what?
Na+ out of the cell and K+ into the cell
What type of solution around the cell would cause the osmotic flow of water illustrated in diagram 2?
solution with the same water concentration
What type of solution around the cell would cause the osmotic flow of water illustrated in diagram 1?
solution with lower water concentration
