BIO 240L – INTRODUCTION TO HUMAN PHYSIOLOGY LAB

General Guidelines for Osmosis Lab Report

See RUBRIC for More Detailed Information

DEADLINE: Refer to the deadline listed on Canvas and the Syllabus.

Format (10 pts)

On a separate sheet of paper, include the title of the report, your name, class and section of the lab, date that it is due, and name of your lab instructor/professor. The report should be typed, double-spaced, and spell checked. If the title page is not on a separate sheet of paper, ALL of the points for format will be deducted.

Introduction (25 pts)

Explain the goal/aim/purpose of the laboratory; this can be in a hypothesis form (questions) or a brief explanation of the expected results. Provide an introduction to chicken egg osmosis/tonicity lab by giving the definitions of osmosis, hypertonic, hypotonic and isotonic solutions. Describe which substances are permeating (can cross the membrane) and which are not-permeating (cannot cross the membrane) through the soft membrane of the egg. Explain what is the use/purpose of the substances used, i.e, acetic acid (vinegar), corn syrup (starch), water, food coloring in reference to our lab. Remember to list any sources in the reference section of the lab report. Avoid web pages that are not reviewed by scientists. Ask if you are unsure. Best resource is our lecture book.

Materials and Methods (10 pts)

List all materials used for this lab, include amounts of solutions, and briefly describe the procedure. Procedure should be in a paragraph form. Include enough detail so that another individual could replicate this lab using only your lab report. Remember to mention that the chicken eggs must be place in acetic acid to remove the hard shell.

Results (35 pts)

Results should be described in a paragraph form. Make sure to describe the results for your group. What happened to the weight of each of the eggs, what happened to the water in the beaker/cup (in or out of cell), what happened to the corn syrup (in or out of cells), what happened to the food coloring (in or out of cells).

Make sure to include a table with the initial weight of each of the eggs (include proper units) and the final weight of the egg.

Discussion (10 pts)

In this section, discuss whether your results match the expected results and if not discuss any possible mistakes, errors or events that could have resulted in these discrepancies.

References (10 pts)

On a separate sheet, list all references used for this lab report. Be careful to cite any material used throughout the report. See the following examples:

For journal article: Author’s last name, first name, (year of publication). Name of article, name of journal, volume, pages.

Example:

Smith, John (2003). Digestive enzymes in the human gut, Journal of Human Physiology, Vol. 256:1126-1128.

For book: Author’s last name, first name. Name of book. Name of editors, place and year of publication, pages used.

Example (use the correct pages, edition and year from where you got the information):

Saladin, Kenneth S. Anatomy and Physiology: The Unity of Form and Function. McGraw and Hill, New York, 2001, pg. 253-256.

For hand-out (with two or more authors): Author’s last name, first name and author’s last name, first name. Name of lesson. Name of company, place and year.

Example:

Smith, John and Saladin, Kenneth S. Lesson #5: Physiology of the heart. BIOPAC Systems Inc. Goleta, CA, 2003.

BIO 240L – INTRODUCTION TO HUMAN PHYSIOLOGY LAB Egg Osmosis RUBRIC

Name: ______________________________ Date turned in: _____________ GRADE ____________

FORMAT (10 pts)

On a separate sheet of paper (if the title page is not on a separate sheet of paper, ALL of the points for format will be deducted) _____________(1 pt)
Include the title of the report _____________(1 pt)
Your name _____________(1 pt)
Class and section of the lab _____________(2 pt)
Date that it is due _____________(1 pt)
Name of your lab instructor/professor _____________(1 pt)
The report should be typed _____________(1 pt)
Double-spaced _____________(1 pt)
Spell checked _____________(1 pt)

INTRODUCTION (25 pts)

Explain the goal/aim/purpose of the laboratory; this can be in a hypothesis form (questions) or a brief explanation of the expected results. _____________(4 pts)
Provide an introduction to this osmosis lab by giving the definitions to:

osmosis _____________(2 pts)
tonicity _____________(2 pts)

hypertonic solution _____________(2 pts)

hypotonic solution _____________(2 pts)
isotonic solution _____________(2 pts)
Include which substance used are permeating and non-permeating substances through the soft membrane of the chicken egg _____________(3 pts)

Explain what is the use/purpose of the substances used,

Acetic acid _____________(2 pts)
Corn Syrup _____________(2 pts)

Food Coloring _____________(2 pts)

Water _____________(2 pts)

MATERIALS AND METHODS (10 pts)

List all materials used for this lab, include amounts of solutions including what is used before the lab to dissolve the hard shell of the egg _____________(4 pts)
Briefly describe the procedure _____________(2 pts)

Procedure should be in a paragraph form _____________(2 pts)
Enough detail so that another individual could replicate this lab _____________(2 pts)

RESULTS (35 pts)

Results should be described in a paragraph form. _____________(1 pts)
Include pictures/drawing of the results _____________(2 pts)
Make sure to describe the results for your group _____________(2 pts)
What happened to the weight of each egg (3 pts each) _____________(6 pts)
What happened to the water in the beaker/cup? _____________(3 pts)
What happened to the corn syrup in the beaker/cup? _____________(3 pts)
What happened to the food coloring in the beaker/cup? _____________(3 pts)
EXPERIMENTAL RESULTS

Table with the weight of the eggs (initial and final) _____________(5 pts)
Table title _____________(5 pts)

Include units _____________(5 pts)

DISCUSSION (10 pts)

Discuss any differences between your results and the expected results _____________(5 pts)
Discuss mistakes/errors/events that resulted in these discrepancies. _____________(5 pts)

REFERENCES (10 pts)

On a separate sheet, _____________(2 pts)
List all references used for this lab report (make sure to include textbook) _____________(8 pts)

TOTAL: _______________________/100 points.