selfcare for nurses
selfcare for nurses.
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Ergonomics Unit 5 Essay 1
Ergonomics Unit 5 Essay 1.
- Unless otherwise indicated, there is a 300 word minimum essay response required.
- Credible reference materials, including your course textbook(s), may be used to complete the assessment.
- If you have questions regarding the credibility of your reference, please contact your professor.
- APA Information
- In-text and reference citations are required for all written responses.
- REQUIRED FOR UPLOADED ASSIGNMENTS ONLY: title page, margins, header, double spacing, and hanging indentation
- For questions concerning APA formatting, please refer to the APA
Course Textbook APA Citation:
Bush, P. M. (2012). Ergonomics: Foundational principals, applications, and technologies. Boca Raton, FL: Taylor and Francis Group.
Essay #1
Compare and contrast design guidelines for a standing operator and those for a sitting operator; include types of work and working height. In addition, discuss the elements of an ergonomic chair.
Your response should be at least 300 words in length. You are required to use at least your textbook as source material for your response. All sources used, including your textbook, must be referenced; paraphrased and quoted material must have accompanying citations.
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UMUC Biology 102 / 103 Lab 3: Cell Structure And Function ANSWER KEY
UMUC Biology 102 / 103 Lab 3: Cell Structure And Function ANSWER KEY. This contains 100% correct material for UMUC Biology 103 LAB03. However, this is an Answer Key, which means, you should put it in your own words. Here is a sample for the Pre lab questions answered:
Pre-Lab Questions
1. Identify the major similarities and differences between prokaryotic and eukaryotic cells. (2 pts)
Prokaryotes tend to be less complex than eukaryotic cells, with fewer organelles and (generally) fewer requirements for survival. Eukaryotes have a nucleus, while prokaryotes do not. Both eukaryotes and prokaryotes have DNA, a cell membrane, and cytoplasm.
2. Where is the DNA housed in a prokaryotic cell? Where is it housed in a eukaryotic cell? (2 pts)
DNA is housed in the nucleus in eukaryotic cells. Prokaryotic cells do not have a nucleus, and thus DNA exists freely in the cytoplasm.
3. Identify three structures which provide support and protection in a eukaryotic cell. (2 pts)
The cell membrane, the cytoplasm, and the cytoskeleton (microtubules, microfilaments, etc.).
The rest of the questions are answered as well:
Onion Root Tip 100X g (Small)
Experiment 1: Cell Structure and Function
Post-Lab Questions
1. Label each of the arrows in the following slide image:
2. What is the difference between the rough and smooth endoplasmic reticulum?
3. Would an animal cell be able to survive without a mitochondria? Why or why not?
4. What could you determine about a specimen if you observed a slide image showing the specimen with a cell wall, but no nucleus or mitochondria?
5. Hypothesize why parts of a plant, such as the leaves, are green, but other parts, such as the roots, are not. Use scientific reasoning to support your hypothesis.
Experiment 2: Osmosis – Direction and Concentration Gradients
Data Tables and Post-Lab Assessment
Table 3: Sucrose Concentration vs. Tubing Permeability
Band Color
Sucrose %
Initial Volume (mL)
Final Volume (mL)
Net Displacement (mL)
Yellow
Red
Blue
Green
Hypothesis:
Post-Lab Questions
1. For each of the tubing pieces, identify whether the solution inside was hypotonic, hypertonic, or isotonic in comparison to the beaker solution in which it was placed.
2. Which tubing increased the most in volume? Explain why this happened.
3. What do the results of this experiment this tell you about the relative tonicity between the contents of the tubing and the solution in the beaker?
4. What would happen if the tubing with the yellow band was placed in a beaker of distilled water?
5. How are excess salts that accumulate in cells transferred to the blood stream so they can be removed from the body? Be sure to explain how this process works in terms of tonicity.
6. If you wanted water to flow out of a tubing piece filled with a 50% solution, what would the minimum concentration of the beaker solution need to be? Explain your answer using scientific evidence.
7. How is this experiment similar to the way a cell membrane works in the body? How is it different? Be specific with your response.
Your Full Name:
UMUC Biology 102/103
Lab 3: Cell Structure and Function
INSTRUCTIONS:
· On your own and without assistance, complete this Lab 3 Answer Sheet electronically and submit it via the Assignments Folder by the date listed in the Course Schedule (under Syllabus).
· To conduct your laboratory exercises, use the Laboratory Manual located under Course Content. Read the introduction and the directions for each exercise/experiment carefully before completing the exercises/experiments and answering the questions.
· Save your Lab 3 Answer Sheet in the following format: LastName_Lab3 (e.g., Smith_Lab3).
· You should submit your document as a Word (.doc or .docx) or Rich Text Format (.rtf) file for best compatibility.
Pre-Lab Questions
1. Identify the major similarities and differences between prokaryotic and eukaryotic cells.
2. Where is the DNA housed in a prokaryotic cell? Where is it housed in a eukaryotic cell?
3. Identify three structures which provide support and protection in a eukaryotic cell.
Experiment 1: Cell Structure and Function
Onion Root Tip: 1000X
A
B
C
D
Post-Lab Questions
1. Label each of the arrows in the following slide image:
2. What is the difference between the rough and smooth endoplasmic reticulum?
3. Would an animal cell be able to survive without a mitochondria? Why or why not?
4. What could you determine about a specimen if you observed a slide image showing the specimen with a cell wall, but no nucleus or mitochondria?
5. Hypothesize why parts of a plant, such as the leaves, are green, but other parts, such as the roots, are not. Use scientific reasoning to support your hypothesis.
Experiment 2: Osmosis – Direction and Concentration Gradients
Data Tables and Post-Lab Assessment
Table 3: Sucrose Concentration vs. Tubing Permeability
| Band Color | Sucrose % | Initial Volume (mL) | Final Volume (mL) | Net Displacement (mL) |
| Yellow | ||||
| Red | ||||
| Blue | ||||
| Green |
Hypothesis:
Post-Lab Questions
1. For each of the tubing pieces, identify whether the solution inside was hypotonic, hypertonic, or isotonic in comparison to the beaker solution in which it was placed.
2. Which tubing increased the most in volume? Explain why this happened.
3. What do the results of this experiment this tell you about the relative tonicity between the contents of the tubing and the solution in the beaker?
4. What would happen if the tubing with the yellow band was placed in a beaker of distilled water?
5. How are excess salts that accumulate in cells transferred to the blood stream so they can be removed from the body? Be sure to explain how this process works in terms of tonicity.
6. If you wanted water to flow out of a tubing piece filled with a 50% solution, what would the minimum concentration of the beaker solution need to be? Explain your answer using scientific evidence.
7. How is this experiment similar to the way a cell membrane works in the body? How is it different? Be specific with your response.
© eScience Labs, LLC 2014
UMUC Biology 102 / 103 Lab 3: Cell Structure And Function ANSWER KEY
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SCIN Packet
SCIN Packet.
Complete all the activities in this lab instruction packet: SCIN 130 Lab 1: The Scientific Method. Work through the instruction packet step by step. Record your results in the worksheet as you progress through this instruction packet.
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SCIN 130 Lab 1: Scientific Method
General Instructions
Be sure to read the general instructions from the Lessons portion of the class prior to completing this packet.
Remember, you are to upload this packet with your quiz for the week!
Background
In this lab, we are going to explore elephants, their current status, and discuss why it is so important to survey them. This ties in to the scientific method:
· Ask A Question
· Do Background Research
· Construct A Hypothesis
· Test with an Experiment
· Analyze Data and Draw Conclusions
· Communicate Results
Specific Lab Instructions
Go to: Survey Methods for African Elephants
Read the “Why Study Elephants” page and answer the following questions:
1. What is the question that scientists are trying to address with this study?
2. What is a potential hypothesis for an experiment involving these elephants?
3. Elephants are considered to be a keystone species. What does that mean?
4. Name three elephant activities or functions that justify the term “keystone species” and describe how the activity changes African ecosystems.
Elephant Activity Change in Ecosystem 5. Why have elephant populations been declining for the past several decades?
Click on the Species Range
6. Click on the Forest Elephant Range, then the Savanna Elephant Range. Which is larger?
☐Forest Elephant Range
☐Savanna Elephant Range
7. Review the Methods, Advantages and Disadvantages of the Species Range data collection; add your thoughts in the table on the last page of this packet.
Click on Individual Range.
8. Take the time to watch the video! In general, why to elephants move across the land?
9. Why do we only have to collar one mature female to get a lot of data of movement of a group and not all individuals?
10. Review the Methods, Advantages and Disadvantages of the Individual Range; add your thoughts in the table on the last page of this packet.
Review the methods in the How Many section.
11. Discuss the methods, sample type, advantages and disadvantages of each in the table at the end of this packet.
Click on the Population Change. Review the video, and read the introductory material.
12. Turn on both the 1979 and 2007 range for the elephants on the map. How did the range change? Did it increase, decrease or stay the same?
13. Turn off the 1979 and 2007 range layers, and turn on the 2016 trends layer. What types of changes do you notice? Are there specific areas where the population is decreasing or increasing? Why do you think this is?
Adapted from: Click and Learn “Survey Methods.” (2016). HHMI Biointeractive Teaching Materials.
SCIN130 Lab 1: Scientific Method
V1 01.2018 Felicetti
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Information Gathered Methods Used Type of Count (Total or Sample/Direct or Indirect) Advantages Disadvantages Species Range N/A Individual Range N/A Aerial Survey Individual Registration Acoustic Surveys Dung Transects
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