Answer:
1. Potassium
2. increasing towards zero
3. hyperpolarization
4. voltage-regulated Potassium
Explanation:
Membrane potential can be defined as the difference in electric charges inside and outside of a cell. The resting membrane potential (RMP) occurs when there is no net current across the membrane and therefore the cell is in a non-excited state. At the RMP, sodium ions (Na+) are more concentrated inside the extracellular fluid (ECF) than inside the intracellular fluid (ICF), while potassium ions (K+) are more concentrated inside the ICF. The diffusion of K+ outside the cell triggers its hyperpolarization, by becoming the membrane potential more negative compared to the resting potential. As the potential nears +35 mV, the voltage-regulated potassium channels are open, thereby K+ ions leave the cell down its concentration gradient, while voltage-gated Na+ channels become saturated and inactivate.
Answer:
The correct answer is - beetles ( coleoptera) that belongs to the arthropods.
Explanation:
There are maximum number of species in order coleoptera that belongs to the phylum arthropods. Almost 25% of total known types of life forms are beetles (coeleoptera).
The maximum numbers of known species in the U.S. are categorize into 4 distinct order coeloptera of the phylum of arthropods are-
Coleoptera (beetles) - 23,700
Diptera (flies) - 19,600,
Hymenoptera (ants, bees, wasps) - 17,500, and
Lepidoptera (moths and butterflies) - 11,500.
Thus, the correct answer is - beetles ( coleoptera) that belongs to the arthropods.
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