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2 years ago

A client with atrial fibrillation has been prescribed Coumadin. What is the rationale for this treatment measure?

Biology

1 answer:

m_a_m_a [10]2 years ago

4 0

Answer:

Coumadin is prescribed for atrial fibrillation to thin the blood and prevent the formation of clots.

Explanation:

Atrial fibrillation is characterized by inadequate pumping of blood by the atria to the ventricle. Since,the atria are in a state of fibrillation or shaking, they cannot pump blood to the ventricles. This increases the risk of blood clots forming inside the atria that could potentially increase the risk of heart attack or stroke if the clots get lodged in the coronary or carotid arteries.

Coumadin is blood thinner that minimizes the aforementioned risks.

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____ is required to start a chemical reaction.

Alexxx [7]

Activation energy is required to start a chemical reaction. Activation energy is the energy needed to allow the reactant to react. Activation energy is measured in Joules (J).

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3 years ago

In 1985 a biologist counted 750 pine trees in a 250 hectare forest. Using similar counting techniques, the biologist counted 1,2

Alisiya [41]

Answer:

Suppose that we have a given function f(x)

The average rate of change of the function between two values x₁ and x₂ is given by:

$r = \frac{f(x_2) - f(x_1)}{x_2 - x_1}$

a) We want to find the average (rate) of change on the size of population from 1985 to 1995.

We have that:

f(1985) = 750

f(1995) = 1500

Then we have:

$r = \frac{1500 - 750}{1995 - 1985} = 750/10 = 75$

This means that the population of trees increases, in average, at a rate of 75 trees per year.

b) What is the density of trees each year that they were counted?

This will be equal to the quotient between the number of trees and the area.

1985: number of trees = 750 pines

area = 250 ha

Then the density is:

D(1985) = (750 pines)/(250 ha) = 3 pines/ha

So 1985, there were 3 pines per hectare.

1990: number of trees = 1250 pines

area = 250 ha

Then the density is:

D(1990) = (1250 pines)/(250 ha) = 5 pines/ha

1995: number of trees = 1500 pines

area = 250 ha

The density is:

D(1995) = (1500 pines)/(250 ha) = 6 pines/ha

3) now we want to get the average change between 1985 and 1995 in the density, this will be:

$r = \frac{D(1995) - D(1885)}{1995 - 1985} = \frac{6 pines/ha - 3pines/ha}{10} = 0.3 pines/ha$

So, on average, each year the number of pines per hectare increases by 0.3

7 0

3 years ago

Why do living things depend on diffusion?

mylen [45]

Living organisms obtain many of their requirements by diffusion. They also get rid of many of waste materials in this way. For example, Plants need carbon dioxide for photosynthesis. This diffuses from the air into the leaves through the stomata. It does this because there is a lower concentration of carbon dioxide inside the leaf as the cells are using it up. Outside the leaf in the air, there is a higher concentration. Carbon dioxide molecules therefore diffuse into the leaf down this concentration gradient :)
I hope u understood!

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3 years ago

Which of the following are advantages of endospores? Endospores reproduce more quickly and are more resistant to environmental t

Fiesta28 [93]

Answer:

B. Endospores are more resistant to dry conditions and are more efficient at producing ATP than vegetative cells.

D. Endospores are more resistant to dry conditions and are more resistant to environmental toxins than vegetative cells.

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3 years ago

What type of microscope is used to achieve three-dimensional views of very small objects such as DNA and viruses? A. Compound mi

avanturin [10]

Your answer will probably be A compound microscope speaking how compounds are pretty small.

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3 years ago