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2 years ago

The ability of a person's cardiovascular system to compensate for blood loss is most related to?

1 answer:

7 0

The ability of a person's cardiovascular system to compensate for blood loss is most related to how rapidly he or she bleeds.

<h3>what is cardiovascular system made up of?</h3>

Your cardiovascular system, which consists of your heart and blood arteries, is an essential component of your body. When your cardiovascular system is functioning properly, your cells receive a constant supply of oxygen and nutrients from your blood. Carbon dioxide and other waste are also removed via blood vessels. You have the ability to maintain your heart and blood vessels healthy. Eating healthy foods, exercising, keeping your blood pressure and cholesterol under control, and quitting smoking are all beneficial to your cardiovascular system. Request assistance from your provider in achieving heart health.

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

seraphim [82]

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. 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.

4 0

2 years ago

In studying the origin of the universe, one of the primary unanswered questions is _____. what type of elements formed first app

Virty [35]

Answer:

In studying the origin of the universe, one of the primary unanswered questions is what came before the big bang.

Explanation:

The big bang theory can be described as a theory which scientists have proposed to explain how the universe came into existence. This theory predicts how the extremely hot temperatures and dense atmosphere might have given rise to the stars and the galaxies.

Scientists have no idea what happened before the big bang theory. Some scientists predict that there might be another universe which collapsed before the big bang theory. While other scientists claim that there was nothing before the big bang.

4 0

3 years ago

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Why is your model useful for describing winds over the oceans but not necessarily the winds that blow over landforms, such as co

ludmilkaskok [199]

Answer:

its because the winds doesn't go to landform such as coastlines and mountains.

Explanation:

its on envisions

6 0

3 years ago

(a) Identify the most likely mode of transport across the membrane for substance L. Explain how information provided helps deter

Viefleur [7K]

Active transport occurs against the electrochemical gradient. It needs energy to move molecules from the lower concentration side to the higher concentration side. The mode of transport is active transport. 

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There are three main different types of transport across the membrane

Simple diffusion ⇒ Does not need energy to occur
Facilitated transport ⇒ Does not need energy to occur
Active transport ⇒ Needs energy to occur

Active transport is the transport of molecules that move against the electrochemical gradient, so it does need energy to happen.

Molecules move from the lower concentration side to the higher concentration side of the membrane.

Carrier proteins are in charge of active transport. The needed energy might proceed from the ATP molecules or the membrane's electric potential.

In the exposed example, a scientist wants to determine how substance L enters a cells in a culture.

The cells maintain a 120 mM intracellular concentration of substance L.

Varying external concentrations of substance L (10 to 100 mM) in culture medium (Table 1).

Table 1. Rate of entry of substance L into mammalian cells in culture

External concentration of substance(mM) Rate of entry of substance L

10 5%

20 25%

30 45%

40 65%

50 80%

60 90%

70 95%

80 100%

90 100%

100 100%

Now, we need to identify the most likely mode of transport across the membrane for substance L, and explain how information provided helps determine the most likely mode of transport.

We know that the intracellular concentration is 120mM.

As we can see, this concentration exceeds all of the culture media concentrations. Yet, the substance keep moving into the cell.

As the concentration inside the cell is always higher than the concentration outside, we can assume that this is not passive transport because the molecule transport is going against its concentration gradient.

Hence, the remaining option is active transport. And as said before, we can see it because the substance keeps crossing the membrane toward the cell interior despite its concentration being higher in the interior of the cell than in the exterior.

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6 0

3 years ago

Why are fungi not included in Kingdom plantae

frutty [35]

Answer:

cell walls of the fungi are made of chitin not cellulose

fungi absorbs nutrients from other organisms whereas plant make their own food

8 0

2 years ago

Read 2 more answers