B, Gases. The gases create an insulation around the planet so it keeps in heat from heat sources.
Answer:
If a stimulus to a neuron is great enough, ___<u>t</u><u>h</u><u>r</u><u>e</u><u>s</u><u>h</u><u>o</u><u>l</u><u>d</u>_____ is reached and an action potential is generated.
Answer:
sea sponge
Explanation:
everything else is symmetrical, sea sponges are known for being whacky shapes and sizes and are never symmetrical
Answer:
Myelination
Explanation:
The covering of myelin around the axons is called the myelin sheath. This myelin sheath helps in transfer of information faster and also in complex processes of the brain. The process of myelination begins in the PNS (peripheral nervous system).
The myelinated section are seperated from each other with a gap called nodes of ranvier. Glial cells (oligodendrocytes) forms the myelin sheath in the central nervous system and schwann cells (glial cells) forms the myelin sheath in peripheral nervous system. The propagation of electrical impulse in the myelinated fibers is by saltatory conduction that is from one node to another.
<span><span>Nucleus-Controls most cell processes and contain the hereditary information of DNA
</span><span>Chromosomes-Small particles made of RNA; assemble proteins
</span><span>
Rough cytoplasmic reticulum-Involved in the synthesis of proteins; has ribosomes attached to its surface
Love,
Makwilson
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