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DIA [1.3K]
1 year ago
14

The reduction of blood volume occurs following severe dehydration and hemorrhage; however, although dehydration results in an in

crease in hematocrit, immediately following hemorrhage hematocrit is unchanged. Explain this difference.
Biology
1 answer:
Ilya [14]1 year ago
5 0

During bleeding, both formed elements (platelets, white blood cells, red blood cells) and plasma are lost from the circulatory system. They are lost proportionally, so initially there is no change in hematocrit.

Hematocrit is the percentage of the blood volume made up of elements (Hct = cell volume/blood volume). During dehydration, only water and electrolytes are lost, and the number of cells remains constant - the same number of cells in a smaller volume leads to an increase in hematocrit. When the body tries to restore blood volume, the first thing to recirculate is water from the ECF and this increases the amount of water without increasing the amount of red blood cells, so the compensatory mechanism causes the hematocrit to fall.

Learn more about  Hematocrit on:

brainly.com/question/13739588

#SPJ4

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pychu [463]

The approximate LD50 of the least toxic substance will be 130 mg/Kg.

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learn more about LD50 here: brainly.com/question/24845532

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8 0
1 year ago
Answer the following:
mihalych1998 [28]
A. behavioral isolation is when the plant or animal acts a particular way to attract their counterparts, like mating rituals.

geographic isolation is the natural barrier preventing similar species from interacting. for example, Galapagos Islands are the only home of flightless cormorants because the islands are so far from any other land for them to invade.

Temporal isolation is when two of the same or similar species cannot reproduce as a result of mismatched sexual maturity.

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Molly's cut is bleeding and she is worried that it will not stop. Using your knowledge of the homeostatic process, what would yo
olga nikolaevna [1]

Answer:

Tell Molly that the bleeding will stop because hemostasis is the way the body stops blood loss when something happens to a vessel. This is the process of the blood clotting. If we didn't have hemostasis bleeding would continue. Unless she has hemophilia, the blood will stop. The first thing that happens is vascular constriction, then formations of platelet plugs, then the blood clots (coagulation) last the fibrous tissue grows (Fibrosis and fibrinolysis)

Explanation:

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This organ produces a chemical called saliva that begins to break down food in the mouth.
puteri [66]

Answer: salivary glands

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The essential difference between an experiment and an observational study is that a. observational studies always involve large
Nataly_w [17]

Answer:

An experiment imposes treatment on the subjects, but an observational study does not

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