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Zepler [3.9K]
3 years ago
5

Astrocytes and tight junctions create a barrier to viruses and bacteria known as

Biology
1 answer:
Soloha48 [4]3 years ago
4 0
<span>Answer:The blood-brain barrier (BHE)

 BHE is a barrier that's highly permeability selective and protects the central nervous system  from potential dangers like viruses, bacteria and parasytes that may be circulating int he blood. <span>It is composed of endothelial cells, astrocytes, pericytes.</span></span>
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When igneous rock is formed,the size of the rock crystals or grains is primarily dependent on
Vedmedyk [2.9K]

Answer:

The three factors that influence the textures of igneous rocks are the speed of cooling, the silicate content, and the water content.

Igneous rocks contain randomly arranged interlocking crystals. The size of the crystals depends on how quickly the molten magma solidified: magma that cools slowly will form an igneous rock with large crystals. lava that cools quickly will form an igneous rock with small crystals. When magma cools, crystals form because the solution is super-saturated with respect to some minerals. If the magma cools quickly, the crystals do not have much time to form, so they are very small. If the magma cools slowly, then the crystals have enough time to grow and become large.

3 0
2 years ago
What chemical provides the blueprint of the cell​
kari74 [83]
Deoxynucleic acid, or DNA is the blueprint of the cell. it has instructions that are needed for the organism to grow, develop, survive and reproduce.
6 0
4 years ago
A two-headed muscle (part of hamstring)<br> a. Vastus lateralis<br> b. Biceps femoris
DiKsa [7]

Answer:

I believe this is the Biceps femoris

Explanation:

6 0
3 years ago
What are plankton and where do they reside?
oee [108]

Answer:

They are organisms (individual organisms called "plankters") that live in large bodies of water.

Explanation:

They reside in large bodies of water (oceans, lakes, etc). They are usually abundant in surface waters because all ecosystems of plankton live off input of solar energy.

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How does water flow?
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From areas of shallow water to areas of deeper water.

Explanation:

6 0
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