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dangina [55]
3 years ago
7

Estimate how much the brain would swell due to osmosis if the concentration of the cerebrospinal fluid fell to 280mM. In other w

ords, find what the new volume of the brain would be once equilibrium was reestablished. Assume that (i) the cerebrospinal fluid is constantly replenished, so its solute concentration won’t change; (ii) only water is passing across the cell membranes into brain cells (not solutes); and (iii) the volume of the brain is mostly water.
Biology
1 answer:
AnnZ [28]3 years ago
6 0

Answer:

The correct answer is 6.67 %.

Explanation:

The average osmotic pressure of the brain is 300 mM

Given the concentration of solution is 280 mM

Difference is 300 - 280 = 20 mM

This difference is sufficient to stimulate osmosis and make water move from CSF to the brain until the concentration becomes similar.  

Also, it is known that the volume of brain is about 1200 ml on an average,  

Volume of fluid moved because of osmosis = 20 mM / 300 mM * 1200 ml = 80 ml

Percent swelling of brain = 80 ml / 1200 ml * 100 = 6.67 %

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4 years ago
4. Describe an observation you made today and an inference you can make from that observation.
OleMash [197]

Answer:

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5 0
3 years ago
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Oduvanchick [21]

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6 0
3 years ago
The sebaceous and sweat glands associated with the skin are classified as ________ glands because they release secretions to the
lbvjy [14]

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The sebaceous and sweat glands associated with the skin also secrete substance to skin surfaces via ducts/ channels and are classified as endocrine gland. There are two glands in the human body Exocrine gland and Endocrine gland.

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6 0
3 years ago
In 1906, President Theodore Roosevelt created the Grand Canyon National Game Preserve on the Kaibab Plateau in northern Arizona.
Fudgin [204]

Answer:

The average density of deer in 1923 was 1 deer per 8 acres

Explanation:

Given -

In 1923, the population of deer rose to 100,000

The density of any species is equal to total population divided by total area of the land in which this population is residing.

d= \frac{P}{A}

Where d represents the density

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Substituting the given values in above equation, we get -

d = \frac{100,000}{800,000} \\d= \frac{1}{8}

Thus, the average density of deer in 1923 was 1 deer per 8 acres

8 0
4 years ago
Read 2 more answers
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