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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