As "nurse" cells for neurons in the brain parenchyma, astrocytes are resident glial cells produced from neuroectoderm.
How astrocytes become pathological?
- Recent research has identified astrocytes as major disease-propagating agents in mutant human superoxide dismutase 1 (mSOD1)-mediated amyotrophic lateral sclerosis (ALS).
- However, due to the widespread expression of mSOD1 throughout the CNS of the investigated rodent models, in vivo examination of a specific astrocytic effect in amyotrophic lateral sclerosis has proven challenging.
- In order to understand how mutant astrocytes affect WT MNs and other cell types (microglia and astrocytes) in an in vivo environment, we transplanted SOD1(G93A) glial-restricted precursor cells into the cervical spinal cord of WT rats.
- SOD1(G93A) glial-restricted progenitor cells that were transplanted survived and successfully differentiated into astrocytes.
Learn more about the Astrocytes with the help of the given link:
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Answer:
Axon.
Synapse
Dentrite and cell body.
Explanation:
AXON is the transmission conduit for action potential through saltatory conduction at the nodes of ranvier.
Synapse refers to the gap between adjacent nuerones and the entire components of that particular gap.
Denrites which originated from the cell.body received the transmitted signals from.the axon,and transmits this for response at effectors:muscle and glands.
The right option is; D Luster
If a mineral has a metallic shine to it, the luster of the mineral is being measured.
Luster is the property of a mineral which describes how the mineral reflects light, and also the dullness or brightness of the mineral. Luster is grouped into two which are; metallic and non-metallic. Minerals with a metallic luster are reflective and opaque. An example is pyrite. Non-metallic luster are also classified into groups based on how much light is reflected. The groups include pearly, dull, waxy, resinous, silky, and vitreous luster.
Ans:
Please read the explanation section.
Explanation:
Vegetative propagation does not require seeds or spores to produce offspring. In this propagation, offspring grow from a specific part of the parent plant. In different plants, vegetative propagation happens in different ways. Here are a few examples.
- Garlic, onions, and tulip plants all reproduce using genuine bulbs/true bulbs. These short covered stems are also called scaly bulbs because it has many layers.
- Crocuses reproduce using corms. Corms are similar to genuine bulbs. But, a corm doesn’t have as many layers as true bulbs.
- Potato plants reproduce using tubers. These underground growths propagate new plants from stems or growing points, which is called eyes.
- Ginger plants reproduce using rhizomes. These stems are those which grow sideways along with the soil or just below the surface.
- Strawberry plants reproduce using stolons. Stolons are looking like branches growing along the ground.
This statement above is TRUE.
Anthrax is an infection that is caused by the bacteria Bacillus anthracis. The infection is spread by contact with the spores of the bacteria. The bacteria affect the respiratory system and cause the lungs to collapse leading to death.
Some countries have developed anthrax as a weapon of war.
