resource binder sbi 4u e: homeostasis alessia, laura, paul, & sheena
TRANSCRIPT
Resource BinderResource BinderSBI 4USBI 4U
E: HomeostasisE: Homeostasis
Alessia, Laura, Paul, & Sheena
AGENDAAGENDA
Essential Question Unit Plan Dry Lab Hook STSE Culminating Activity Wet Lab Historical Topic: History of Homeostatic Systems Recent Research: Article Analysis and Forum
Expectations and Essential Expectations and Essential QuestionQuestion
Dry LabDry Lab
The Urinary System Exposed!– the urinary system– feedback mechanisms– water balance– effects of alcohol
links to the STSE activity!
Image from http://www.cic-caracas.org/departments/science/Topic12.php
Dry lab – Part ADry lab – Part A
NaCl
NaCl, urea, H2O
H2OH2O, HCO3-, NaCl, K+, nutrients
H+, NH3
H+, K+ NaCl, H2O, HCO3-
Dry lab – Part BDry lab – Part B Comparing solutes in plasma, nephron and urine Sample question: What happened to the levels of urea
and ammonia after filtration? Explain why this occurs.
Table 1. Concentrations of solutes in the Bowman's capsule, glomerulus, loop of Henle and collecting duct in g/100 mL (from Nelson 2003)
Solute Bowman’s capsule Glomerulus Loop of Henle Collecting duct
protein 0 0.8 0 0
urea 0.05 0.05 1.5 2
glucose 0.1 no data 0 0
chloride (Cl-) 0.37 no data no data 0.6
ammonia (NH3)0.0001 0.0001 0.0001 0.04
substance X 0 9.15 0 0
Dry lab – Part CDry lab – Part CAntidiuretic hormone (ADH)Negative feedback systemEffect of alcohol on ADH and urine
formation
HookHookMouse Party
– Introduces homeostasis of neural systems– Important hook for STSE Activity– http://learn.genetics.utah.edu/content/addiction/drugs/mouse.html
– Not meant to endorse drug use!
Homeostasis STSE ProjectHomeostasis STSE Project
Part A: Research a chemical substance
Part B: Research an organ system and how it is involved in maintaining homeostasis
Part C: Create an ‘anti-substance’ advertisement on the chemical substance
History of Homeostatic Systems
Go back in time and create a 300-500 word newspaper article
Presents the discovery of a homeostatic mechanism
Discovery of:– Insulin, Thyroid Disease,
Testosterone, Estrogen, Thermoregulation, Growth Hormone, Feedback loops
Article Analysis and ForumArticle Analysis and Forum
Students are required to find an article describing a recent discovery, advancement relating to homeostasis
Identify biases and false claimsSummarize major findings in a 3-4min
presentation Gallery walk and debrief of findings
Wet LabWet Lab
Examining the Effects of Exercise on Humans
Precautions: Students with health conditions should be given a modified wet lab
Students will collect data about their heart rate after exercising
Homeostasis Wet LabHomeostasis Wet Lab
Introduction: Human body responds to changes in
conditions to maintain a constant/ideal internal environment
This Lab: Students will investigate the body’s response to factors of their choice
Homeostasis Wet Lab
Task– Investigate 2 Variables (of students’
choice) that affect heart rate.Devise list of methods and materialsTeacher will approve procedure
Questions for Wet Lab
What was the change in Heart Rate after the treatment?
How long did it take for the heart rate to return to its basal level?
How did your body respond to the stress? (Hint: Cardiovascular system, Renal system, hormone regulation?)
Write Up: Formal Lab Or Informal Class Discussion