We use cookies to give you the best experience possible. By continuing we’ll assume you’re on board with our cookie policy

Influence of Fluid Intake on Urine Formation Laboratory Report Essay Sample

The whole doc is available only for registered users OPEN DOC

Get Full Essay

Get access to this section to get all the help you need with your essay and educational goals.

Get Access

Influence of Fluid Intake on Urine Formation Laboratory Report Essay Sample

1. Urine output will be highest during: water loading

2. Urine osmolality will be lowest during: dehydration

3. Plasma osmolality: increases with dehydration


1. Dependent variable: urine and plasma values

2. Independent variable: fluid intake

3. Controlled variables: age, gender, and weight; room temperature

4. Subjects were asked to refrain from alcohol and caffeine for a day before the start of the experiment. Explain why this is important. Alcohol and caffeine will increase the amount of urine output

5. What technique was used to measure urine and plasma osmolality? Water consumption measured urine output, and a finger stick. An osmometer was used to check osmolarity.


See Table 3: Urine Production Rate
See Graph 1: Average Daily Urine Production Under Different Hydration States

1. Does dehydration increase, decrease, or not change average urine production rate (L/day)? Decreases production

2. Does water loading increase, decrease, or not affect average urine production rate (L/day)? Increase production

See Table 4: Osmolality (mosm/L)
See Graph 2: Blood Plasma and Urine Osmolality Under Different Hydration States

Type in the following AVERAGE urine osmolality (mosm/L)
Water Loaded


Water Loaded
Subject 1
Subject 2
Subject 3

3. Does dehydration increase, decrease, or not change average urine osmolality (mosm/L)? Increases

4. Does water loading increase, decrease, or not change average urine osmolality (mosm/L)? Decreases

Type in the following AVERAGE plasma osmolality (mosm/L)
Water Loaded


Water Loaded
Subject 1
Subject 2
Subject 3

5. Does dehydration increase, decrease, or not change average plasma osmolality (mosm/L)? Doesn’t change

6. Does water loading increase, decrease, or not change average plasma osmolality (mosm/L)? Doesn’t change


1. State whether dehydration results in production of a concentrated or dilute urine. Concentrated urine

2. State whether water loading results in production of concentrated or dilute urine. Dilute urine

3. Describe how ADH secretion during dehydration changes urine production and osmolality. The water is reabsorbed more, therefore urinates less, and increases osmolarity.

4. Describe how ADH secretion during water loading changes urine production and osmolality. There is excess water, therefore more urination, and decreased osmolarity.

5. Describe how ADH secretion maintains plasma osmolality levels during dehydration and water loading. Based on the state of hydration, ADH secretion will either assist or take away in reabsorption of water. This helps maintain normal osmolarity whether or not were hydrated (to an extent).

6. Explain why in this experiment you did not see significant changes in plasma osmolality during dehydration or water later loading. The ADH secretion maintains plasma osmolarity regardless of hydration levels.

7. Discuss why maintaining plasma osmolality within normal limits is important. Normal plasma osmolarity cycles and wastes using urine most efficiently. This process involves both waste and nutrients.

8. Restate your predictions that were correct and give the data from your experiment that supports them. Restate your predictions that were not correct and correct them, giving the data from your experiment that supports the correction. Everything was correct, except the fact that plasma osmolarity does not significantly change based on hydration level because of the secretion of ADH.


1. Drinking alcoholic or caffeinated beverages increases urine output more
than drinking an equivalent amount of water.

How do you think these beverages affect ADH secretion?
These beverages drop the amount of ADH secretion, meaning less reabsorption in the kidneys and an uneven amount of urine leaving the body. Would urine osmolality be increased or decreased?

2. Explain why someone with diabetes insipidus must drink more water than normal. There is an excessive amount of water loss in someone with diabetes insipidus. The diabetic kidneys do not keep the proper amount of water in the body, and the water is lost in the form of Dilute Urine.

3. Explain what happens to plasma osmolality when you give a severely dehydrated person large amounts of pure water. The plasma osmolarity would decrease because of the dilution of the newly dissolved molecules by the “pure water”.

We can write a custom essay

According to Your Specific Requirements

Order an essay

You May Also Find These Documents Helpful

Should there be restriction on the sale...

Energy drinks refers to any soft drink containing a high percentage of sugar, caffeine, or another stimulant, typically consumed during or after sporting activity or as a way of overcoming tiredness. It is argued that the sale of energy drinks need to be banned. The term energy drink was created by companies in the beverage industry and is not recognized by the United State Food...

Mountain Dew

If you go to a dirt bike competition you see riders wearing gear by Mountain Dew. If you go watch skate boarders they also have Mountain Dew gear and are enjoying the caffeinated beverage. This is something that even if it’s a Coca Cola sponsored event you still see Mountain Dew because this is something the younger generation drinks and likes to have as their...

High on Caffeine: Regulating Energy Drinks

Caffeine is a stimulant that leads to temporary alertness. Its purpose is both clear and highly effective. Caffeine can be found in many different available beverages, such as, coffee, tea, soda, and energy drinks of course. Many people do not recognize that caffeine can be toxic at certain dosages, and lead to very serious health risk. Tan-Li Hsu the author of “High on Caffeine: Regulating...

Competition Energy Drinks

The beverage industry, like most food service industries in these economic times, faces many challenges. Not one company is excluded from the challenges of economic conditions, demographics, social and global forces, and regulatory, political, and legal factors. The global economic conditions affect the energy drink industry in many ways. This industry depends highly on the disposable income of its customers. People are very cautious with...

Five Forces of Competition on Energy Drinks...

There are already many brands in the energy drinks industry. Simultaneously, existing beverage producers are coming up different products to capture increasing the size of the market for alternative beverages by extending existing product lines and developing altogether new products. Increasing marketing strategies The competition among producers becomes more and more fierce. Because many Sellers put active and aggressive efforts on establishing consumer brand loyalty...

Get Access To The Full Essay
Materials Daily
100,000+ Subjects
2000+ Topics
Free Plagiarism
All Materials
are Cataloged Well

Sorry, but copying text is forbidden on this website. If you need this or any other sample, we can send it to you via email.

By clicking "SEND", you agree to our terms of service and privacy policy. We'll occasionally send you account related and promo emails.
Sorry, but only registered users have full access

How about getting this access

Become a member

Your Answer Is Very Helpful For Us
Thank You A Lot!


Emma Taylor


Hi there!
Would you like to get such a paper?
How about getting a customized one?

Can't find What you were Looking for?

Get access to our huge, continuously updated knowledge base

The next update will be in:
14 : 59 : 59
Become a Member