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Rashid [163]
3 years ago
14

The renin-angiotensin system activates to restore fluid to a normal level when a person is dehydrated.

Biology
1 answer:
seraphim [82]3 years ago
4 0
The statement is true.
Renin-angiotensin system will be activated when there is a loss of blood volume (or decrease of blood pressure, such as in haemorrhage or dehydration. <span>Renin is secreted by kidneys directly into the circulation when the blood flow is reduced. Renin then stimulates conversion of angiotensinogen, released by the liver, to angiotensin I which will then be converted to angiotensin II by the angiotensin-converting enzyme (ACE) found in the lungs. Angiotensin II is a vasoconstrictor(increases the blood pressure) and also stimulates the secretion of the aldosterone from the adrenal cortex. Aldosterone increases the reabsorption of sodium and water into the blood and the excretion of potassium (to maintain electrolyte balance). This also increases blood pressure and retention of water.</span>
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Phosphorus in rivers can lakes sinks to the bottom and over thousands of years becomes ______ again.
pshichka [43]

Your question isn't the most clear, but I think your answer is rocks, or more specifically phosphorous rich rocks because the phosphorous will mix with the sediments on the river's/lake's ground forming phosphorous rich rocks.

That means that It'll become a phosphate mineral and later become phosphorous again when the minerals weather.



Hope it helped,



BioTeacher101

5 0
3 years ago
as the submersible approaches the twilight zone (300m deep), what changes in light and temperature occur?
Sunny_sXe [5.5K]

In the twilight zone, the temperature and the light conditions change. The initial 200 meters of the ocean as considered as the open ocean. There is availability of light and thriving temperature there. Butt below that, in the 'deep ocean'. The availability of light decreases and as we go further down, the light no longer reaches those parts of the ocean. Moreover, the temperatures plummet down to almost freezing conditions. In addition to this, the pressure is much more higher in the deep ocean.

4 0
3 years ago
Entrepreneurs attempted, but failed, to harvest nuts from plantations grown in Southeast Asia. Attempts to grow Brazil nut trees
Anuta_ua [19.1K]

Answer:

The reason that there is no fruit even the plant produced healthy flowers maybe because

1. absences of pollinators due to declining poliinator population

2.weather conditions are preventing pollination

3. prevalence of flooding

Explanation:

1.Fruits are direct result of pollination. Due to the decrease in the number of pollinators especially orchid bees, some fruit bearing plants produce flowers but no fruit.

Bees decline their population because of parasites, diseases, exposure to chemicals and other environmental factors.

2.Unfavorable factors may prevent the agents of pollination to do their jobs. Bees and other insects may be hindered by wet or cold weather or some use of chemicals.

3.Brazil nut grow in lowland rainforest where there is no flooding.

4 0
3 years ago
Which organic molecules form the major structural materials of the body?
dangina [55]

Answer:

Proteins

Explanation:

They are found everywhere in the body from muscle, cell membranes, hair, enzymes, and etcetera and are responsible for the phenotype of organisms. Proteins are the ultimate expression of genes in the DNA of organisms. The DNA is transcribed by DNA polymerase into mRNA, then mRNA is translated into protein by ribosomes. This general rule is called the central dogma.

4 0
4 years ago
The amino acid sequence of the protein cytochrome c is compared between three different species: gray whale, hippo, and elephant
stepan [7]

Answer:

Answer is C

Explanation:

The most similar is hippo and gray whale because they only differ 5 amino acid. The most different is gray whale and elephant  because it is 30 amino acid different.

7 0
3 years ago
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