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Makovka662 [10]
3 years ago
10

How does the cerebral arterial circle ensure that the brain has a constant supply of blood?

Biology
1 answer:
Viktor [21]3 years ago
6 0
Via collateral circulation. This is an alternative route of blood circulation around the brain whenever one pathway is blocked or narrowed. The arterial arrangement of the brain are symmetrically designed in such a way that continuous blood flow the brain is ensured. The cerebral arteries (anterior and posterior) can be interchangeably shared if one of them is restricted. This means that if one artery is blocked/narrowed the other can accommodate the blood flow needed by the brain.
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while observing an elodea plant cell through a microscope a student noticed a small moving greendisk these organelles are most l
Drupady [299]
Answer:  "photosynthesis" .
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<u>Note</u>:  These small, moving "green disks" seen while observing an <em>Elodea</em> plant cell—under a microscrope— are "chloroplasts".   The "chloroplasts" are organelles that ar responsible for "photosynthesis" .
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6 0
3 years ago
What is the difference between metaphase in mitosis and metaphase II in meiosis? How are they the same?
lora16 [44]

Answer:

What is the difference between Metaphase 1 and Metaphase 2? In Metaphase I, the 'pairs of chromosomes' are arranged on the Metaphase plate while, in the Metaphase II, the 'chromosomes' are arranged on the metaphase plate. In Metaphase I, the spindle fibers get attached to two centromeres of each homologous chromosome.

In metaphase 1 the pairs of chromosomes referred to as bivalents are totally condensed. Moreover the in metaphase 1 of meiosis there is no centromere division whereas in metaphase of mitosis it does. They align on the metaphase plate in between the poles.

Explanation:

4 0
3 years ago
The movement of water from high to low concentration across a semipermeable membrane is best defined as:.
andrew11 [14]

<em><u>The movement of water from high to low concentration across a semipermeable membrane is best defined </u></em><em><u>as</u></em><em><u> </u></em><em><u>Osmosis</u></em><em><u>.</u></em>

<em><u>have</u></em><em><u> </u></em><em><u>a</u></em><em><u> </u></em><em><u>great</u></em><em><u> </u></em><em><u>day</u></em><em><u>!</u></em>

8 0
2 years ago
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GenaCL600 [577]

Answer:

A

Explanation:

3 0
2 years ago
Read 2 more answers
Which of the following does not explain why if two people are exposed to the same high stress causing conditions, there is a lik
e-lub [12.9K]

Answer:

Probably B

Explanation:

They all explain it, honestly, but B sounds the least like an answer they would accept as true. It's also kind of sus that they have 2 different answers about reacting differently to stress, and B is definitely the least likely of the two to be correct. Sorry I couldn't be more helpful, I'm only here because I searched for the answer myself. Good luck.

8 0
3 years ago
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