Archive for year: 2024

MaterialsThermometer (supplied)Jar, large enough for thermometer to fit in, with lid (student supplied)Small plastic or glass container (student supplied)Vinegar (student supplied)Steel wool (student supplied)Gloves to protect hands while working with steel wool (student-supplied)ProcedureNote: If you did not do so at the beginning of this lesson (as directed) begin by setting all the materials out for at least 20 minutes to adjust to room temperature (overnight if the vinegar has been refrigerated).Place the thermometer in the jar and close the lid. Wait five minutes for the thermometer to adjust to the temperature. Open the lid and record the temperature.In the other container, soak a small piece of the steel wool in the vinegar for about one minute. Separate the steel wool so that vinegar can reach all the filaments. The vinegar needs to be at room temperature.Squeeze the excess vinegar from the steel wool.Wrap the steel wool around the thermometer and place both in the jar (you can use a rubber band). Close the lid.After five minutes open the lid and record the temperature.Note: Be sure that the vinegar and all other materials are at room temperature as directed. Record temperature changes carefully and accurately, because the change in temperature will be small.AnalysisCopy and paste these questions into a Word document, and save it as an .rtf file. You will submit these questions as the assessment to this lesson.What was the initial temperature in the jar?What was the temperature after the reaction?What was the change in temperature?Based on information from Part I and from observations, was this reaction Exothermic or Endothermic?Are chemical bonds forming or breaking?In this experiment, the acidic vinegar dissolved a protective coating off the steel wool, allowing the oxidation of the steel to begin. This process is called rusting. In this reaction, iron is combined with oxygen gas to form iron oxide. Hint: An iron (III) product is formed.

Please read the Discussion Board Directions located on the course menu on the left side of the screen before you begin to post or reply.
Topic:
A list of specific types of transporters found in cell membranes is given below. Choose ONE of these and then describe in detail:

how the transporter works
whether it is an active or passive transporter
a specific type of cell that it can be found in and why it is important in this cell type
consequences for body function when this transporter type fails (due to a mutation that makes it non-functional).

Transporter types:

Sodium/Potassium Pump (this one is quite straight forward so you should be able to give a very detailed description).
GLUT transporters (choose one of these):
GLUT 1
GLUT 2
GLUT 3
GLUT 4
Sodium/Glucose transporters in enterocytes
Gated ion channels in the cochlea of the ear
Voltage-gated Na+ channel
Voltage-gated K+ channel
Voltage-gated Ca+2 channel
Chloride leak channels
Hydrogen ion (H+) ATPase
Dopamine transporter (DAT)
Serotonin transporter
Norepinephrine transporter

In some cases, you may be able to find a specific related disease. If you do not, think about why the transporter needs to be in the cell type you named and think about what would happen to the body if the transporter did not work.
Respond to Others: Many of the descriptions will be quite technical. It is your job to write the description for your transporter so that your classmates can easily understand it. This means you will probably have to look up quite a few terms and re-word them into “common” language.Compare and contrast the type of transporter you reviewed with those that others reviewed. Choose a transporter reviewed by another student and go into more depth on the mechanism by which it operates or the need for the transporter in the cell type in which it is found, and make corrections to another student’s post if they are incorrect about something they have posted. 

List the top 4 priority interventions                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              
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Required Reading
Centers for Disease Control and Prevention (CDC). (2016, February 25). Ten leading causes of death and injury 2014. Accessed from http://www.cdc.gov/injury/wisqars/LeadingCauses.html
Gerstman, B. (2013). Chapter 3: Epidemiologic measures. Epidemiology kept simple (3rd ed). Oxford: John Wiley & Sons. San Jose State University. Retrieved from http://www.sjsu.edu/faculty/gerstman/eks/chap3-eks-3ed.ppt
MedicineNet, Inc. (2016). Definition of mortality rate. Retrieved from www.medterms.com/script/main/art.asp?articlekey=10118
New York Department of Health. (n.d.). Basic statistics: About incidence, prevalence, morbidity, and mortality. Retrieved from www.health.ny.gov/diseases/chronic/basicstat.htm
Optional Reading
Niles, R. (2015). Statistics every writer should know. Retrieved from RobertNiles.com http://www.robertniles.com/stats/
Homework Assignment:
Case Assignment
Twenty-five children in Fallsburg Elementary School (with a population of 60 pupils) received their immunization against whooping cough to protect the school’s student population. In your role as health officer, you collected the documentation from parents on the first day of school. You found that 25 students had received their immunization against the disease. You have been asked to explain some basic epidemiologic concepts to the parents who did not have their children immunized.
You have been tasked to do the following:

Define the term population at risk and indicate which of the elementary students are not at risk.
Also describe the difference between incidence and prevalence.

Be sure to justify your response with evidence from the literature.
Length: 2–3 pages, excluding title page and references.
Assignment Expectations
Assessment and Grading: Your paper will be assessed based on the performance assessment rubric that is linked within the course. Review it before you begin working on the assignment.
Your work should also follow these Assignment Expectations.

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