Answer: depolarization; hyperpolarization
Explanation:
At resting potential (absence of stimulus), the cell membrane of a neuron is said to be polarized with a net negative charge within due to more potassium (K+) ions present than sodium (Na+) ions.
However, an impressed stimuli reverses the ions content as K+ ions flows out and quickly replaced by Na+ ions, resulting in a decrease in membrane potential and a more positive cell membrane. Thus, depolarization occurs.
An increase in the membrane potential (so that it becomes more negative) is called hyperpolarization.
Here are some things that interfer with the ecosystem (highways, driving cars, fossil fuel, cities, farms, deforestation, over hunting, over fishing and plastics)
Answer: stimulus (plural: stimuli).
Explanation:
Reproduction, Heredity, Variety in fitness of population, and variety in characters among the population are all four conditions for natural selection.
