Water, Oxygen, Food, Heat, Pressure
Answer:
The mitosis process includes only four phases of the event in mitotic cell division.
Explanation:
- Mitosis is the biological cell division cycle that produces tow daughter cell with equivalent number of chromosomes.
- In mitosis the nucleus divides, chromosome separates and moves to the opposite poles and forms two daughter cell at last.
- There are four phases in the mitosis cell division: prophase, metaphase, anaphase, and telophase repectively in the order.
- These four phases causes cytokinesis and occur in sequential order.
<h2>Membrane potential </h2>
Explanation:
- Membrane potential represents charge difference across the membrane, all biological cells are negative inside (cytoplasm) and positive outside (due to difference in ionic distribution)
- In a typical neuron cell membrane potential of cytoplasm is negative at rest (when no stimulus is applied) hence called resting membrane potential
- Resting membrane potential of excitable cells is established by Na+ and K+pump
- Repolarization starts with the efflux of K+ by the opening of voltage gated K+ channels
- Voltage gated K+ channels starts to open when voltage gated Na+ channels becomes inactive
- Hyperpolarization occurs due to excessive efflux of K+ by voltage gated K+ channels
- Additional efflux of K+ occurs due to slow inactivation of voltage gated K+ channels
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