What are the major tissues of the nervous system?
The details of the 2 major tissues of the nervous system which are the neurons and the glial cells were properly explained in this article. The neurons were mentioned to be amitotic, meaning they don’t have the ability to undergo mitosis and create more neurons. This major tissue is also known to have 3 parts, the body and its 2 processes the dendrites and axons. The neuroglia was described as the major tissue that provides structural support for the neurons. There are 2 types of neuroglia, the macroglia which helps neurons develop and the microglia that has phagocytic properties. Aside from the 2 major tissues, the article aso provided information on the myelin sheath and how it is different from myelin in the sense that myelin is what’s being secreted by either oligodendrocytes (CNS) or Schwann cells(PNS). Meanwhile, the myelin sheath is the thing that wraps around the axon to insulate it. Additionally, the nodes of Ranvier were also mentioned and were described as gaps in the myelin that allows for signals to jump.

What is the function of the nervous tissue cell?
The first part of the article talked about the 2 major divisions of the nervous system which are the central and peripheral nervous system. Afterwards, it talked about the main trait of nervous tissues which is excitability/irritability. This trait is what enables nervous tissue to communicate with each other through signals. Aside from these, the different types of neuroglia found in the 2 divisions of the nervous system were also mentioned and described. In the central nervous system we have oligodendrocytes, astrocytes (known for their star-shaped structure), ependymal cells, and microglia. In the peripheral nervous system we have Schwann cells and satellite cells. Lastly, the 2 most important organs in the nervous system, the brain and spinal cord, were also discussed in the article

What are the major neurotransmitters in the CNS?
Before discussing the major neurotransmitters in the CNS, its general function was given which was to allow brain cells to communicate with each other. The major neurotransmitters stated in the article are acetylcholine, catecholamines, serotonin, and GABA (y-aminobutyric acid). The neurotransmitters were classified under 4 types, excitatory, inhibitory, neurohormones, and neuromodulators. One of the few interesting facts I could gather from the article is that acetylcholine is a neuromodulator that affects our attention and memory. Another is that in times of stress norepinephrine constricts our blood vessels to raise our blood pressure. Meanwhile, epinephrine forces the heart to contract with greater strength. The actions of these neurotransmitters cause an increase in blood pressure and cardiac output of an individual. But how do these neurotransmitters travel from neuron to neuron? luckily this question was also answered in the article. It stated that the release of neurotransmitters is triggered by the opening of voltage-gated calcium channels allowing them to travel across our synapses. And the removal of neurotransmitters from the synapse would entail reuptake and the function of deactivating enzymes.