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sladkih [1.3K]
1 year ago
6

Which type of specimen must be chilled if testing will not be performed immediately?

Biology
1 answer:
Marat540 [252]1 year ago
5 0

Urine Specimen must be chilled if testing will not be performed immediately.

<h3>What is Urine?</h3>

Urine is a liquid byproduct of human and many other animal metabolism. Urine travels from the kidneys to the urinary bladder via the ureters. Urine is discharged from the body through the urethra as a result of urination.

Many by-products of cellular metabolism, such as urea, uric acid, and creatinine, are nitrogen-rich and must be removed from the bloodstream. These by-products are excreted from the body through urination, which is the major way for excreting water-soluble compounds. A urinalysis can identify nitrogenous wastes in mammals.

To learn more about urine visit:

brainly.com/question/27454851

#SPJ4

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Lab: Exercise and Homeostasis Lab Report
Contact [7]

Answer:

The question that was trying to be answered in this lab was “How does exercise affect a person’s heart rate, breathing rate, and perspiration level?” Based on this question, the hypothesis that was formed was “If effects of exercise and exercise are related, then exercising will increase heart rate, breathing rate, and perspiration level”.

Background Information: THIS SHOULD BE PART OF YOUR INTRODUCTION

Before starting the lab report, the important background information that was collected was very helpful while performing the lab. For example, homeostasis is defined according to Dictionary.com as “the ability of the body to maintain relatively stable internal conditions”. Homeostasis in the body is maintained through three vital organs, as mentioned before, the kidneys, liver, and brain. These regulate the temperature, iron content in our blood, retention, and production of energy and overall blood composition. This was helpful because the whole lab report was based on homeostasis and the effect that it had on exercise. Another piece of information that proved to be very important explained the different types of changes that occur during exercise to help the body adjust to maintain equilibrium. These types of changes are perspiration and blood level.

When researching the typed of mechanisms that are used to maintain a constant body temperature, the information that was found was that “our bodies have nerve cells called thermo receptors that measure temperature of our internal body and external environment” (Godbole). When these nerve cells are stimulated by changes inside our bodies and in the world outside, they send their information to the brain, where it is mostly the job of the medulla oblongata to make changes to keep our internal body temperature constant.  

Exercise helps keep you fit and healthy by strengthening your muscles and making your heart beat faster. Your muscles, lungs, and heart all work together to move your body and make sure you are getting enough oxygen. This results in an increase in your breathing rate, or rate of ventilation. Your breathing rate is increased due to the fact that “your muscles are working harder then when they are at rest. This means that they need oxygen, along with sugars to complete cellular respiration.” (Why Does Your…) Your heart rate increases so that it can move the oxygen to the target cell in the muscles you are using quicker.

Materials and Methods:

Materials:

People to exercise

A clock or stop watch

Procedure:

Choose one volunteer to complete jumping jacks at a pace that can be maintained for eight minutes. Make sure the volunteer is inactive for a few minutes before the experiment begins.

Measure the heart rate by taking his or her pulse; you can do this one of two ways:

Radial Pulse

Carotid Pulse

Multiply the number of beats in 15 seconds by 4 to calculate the beats per minute. Record the data in the table below the 0 minutes box.

Measure the person’s perspiration level from 0 to 5: (0 = none; 5 = droplets dripping down the face). Note this observation in the table.

Have the volunteer do jumping jacks for 2 minutes. After 2 minutes, measure the heart rate, breathing rate, and perspiration level (refer to steps 2 through 5), and record the data. Measure the pulse, breathing and perspiration levels as quickly as you can so that the volunteer can resume exercise. Do not have volunteer wait while you do the calculations and enter the data.

Repeat step 6 three more times (remember, 2 minutes each at a time, totaling 8 minutes) and record your data at each point.

After the final recording of the dependent variables, wait one minute with the volunteer at reset.

Then measure all of the variables again. Record this data under the “9 Time (Min.) Box”.  

Data and Observations:

Table 1: Effect of Exercise

Total Time

(Minutes)

Heart Rate

(Beats per Minute)

Breathing Rate

(Breaths per Minute)

Perspiration Level

(Scale of 0 to 5)

0 – Prior to Exercise

84

36

0

2 Minutes

128

52

0

6 Minutes

96

36

1

8 Minutes

120

40

2

9 Minutes

144

44

2

Table 1: shows the heart rate, breathing rate and perspiration level of exercisers over nine minutes

Table 2: Effects of Exercise: Class Averages

Variables Measured

Group

1

Group

2

Group

3

Group

4

Group

5

Averages:

Heart

Rate

Start:

68

104

104

98

84

73

Finish:

38

152

120

120

144

115

Breathing Rate

Start:

Explanation:

6 0
2 years ago
What factors contribute to past and present changes in California's sea otter population?
ra1l [238]

Answer:

White shark bites, parasites, food availability, habitat degradation are among some of the contributing factors threatening the recovery of the species. The greatest threat to a sea otter is the oil spills.

Hope this helps!

Extra - Fun fact - Sea otters play a vital role in the health and stability of the nearshore marine ecosystem as a keystone species.

6 0
3 years ago
Read 2 more answers
A scientist is studying the action of RNA polymerase during transcription. He wants to know what type of bases are added to the
Vinvika [58]
The answer is A. RNA polymerase will be making an mRNA using a single DNA strand as a template. So, for example if the DNA strand is AGGCAGC the mRNA strand will be UCCGUCG. U= uracil which replaces thymine in mRNA molecules. <span>
i hope my answer helped!!!!!!!</span>
4 0
3 years ago
What is the best explanation for the observation that eukaryotes that seem superficially simple can have much larger genomes (in
brilliants [131]

Answer:

Some organisms have a tremendous amount of noncoding DNA, like repetitive sequences.

Explanation:

DNA is the genetic material in almost all the living organisms but except in case of viruses that has RNA as their genetic material. DNA consists of the four nitrogenous bases, pentose sugar and phosphate group.

Prokaryotes have simple body organization and structure because of the sall amount of DNA. Eukaryotes have complex body organization because they have large amount of the transposons, repetitive sequences and non repetitive DNA sequences.

Thus, the correct answer is option (b).

3 0
3 years ago
Why is this relationship between a plant and bacteria called a mutualism?
belka [17]
Mutualism is relationship that is beneficial to both organisms involved. The relationship between a plant and a bacterium called a mutualism because both of them help each other. Bacteria are involved in increasing the fertility of the soil by fixing atmospheric nitrogen and thus provide plant with nitrogen. In return, the bacteria make their homes in what usually become nitrogen "nodules" along plant roots. The plant gets food, the bacteria gets shelter, everybody wins.
8 0
3 years ago
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