EH205 Review #1: Homeostasis September 12, 2011. Homeostasis and blood glucose Blood glucose is an example of a _________ variable. What is the controlled.

Slides:

Advertisements

Similar presentations

Homeostasis A condition in which the internal environment of the body remains relatively constant despite changes in the external environment. Examples.

Advertisements

The Human Body: Organ Systems and Homeostasis

Overview of Anatomy and Physiology Anatomy – the study of the structure of body parts and their relationships to one another Gross or macroscopic.

Control of the Internal Environment

Homeostasis and Feedback in the Body

Staying in balance Arrange the cards into a table listing the ways in which the body can gain or lose heat. Gain HeatLose Heat Describe how heat can be.

Rapid change in one direction Does not maintain homeostasis

What do you need to survive right now? Homeostasis!

Homeostasis. Claude Bernard (1813 – 1878) French Physiologist Called the environment of cells the internal environment Bernard made the observation that.

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Necessary Life Functions  Maintain boundaries  Movement  Locomotion  Movement.

Homeostasisq Defined as maintenance of a relatively stable internal environment Defined as maintenance of a relatively stable internal environment Homeostasis.

Day Objective: Define homeostasis and its affect on human body systems. Describe the role of the cell membrane in maintaining homeostasis. Warm up: Which.

1 Human Physiology Bio 5 Denise Lim, Instructor. 2 ParScore Scantrons for Lecture Tests  Orange, 8.5" X 11"  Do not wait until the day of the exam to.

Unit 1: Organization of the Body DLT #’s 5 – 7 Chapter 1: The Human Body: An Orientation.

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Life Functions— What the body is built for 1.Maintain boundaries 2.Movement 3.Responsiveness.

Douglas Todey. Functions The system is made up of glands that produce and secrete hormones to regulate the activity of cells and organs The hormones regulate.

COMPONENTS OF CREATING BALANCE 1. STIMULUS- change that occurs in the internal environment ( ex. During exercise, not enough oxygen getting to cells)

Human Anatomy & Physiology, Sixth Edition Elaine N. Marieb 1 Introduction to Anatomy & Physiology.

 Homeostasis. What is Homeostasis?  The way the body keeps its internal environment constant, in other words, how the body “maintains a steady state”

BIG BANG THEORY

Positive and Negative Feedback

What is Homeostasis? The maintenance of a constant environment in the body is called Homeostasis.

Feedback Loops Positive and Negative Feedback Loop Examples.

Homeostasis Balancing the internal environment. External vs. Internal Environment What is the difference?

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Organ System Overview.

Copyright Pearson Prentice Hall

Lab this Week Endocrinology of Hormone Supplementation Write a paragraph in which you 1) identify the major objectives of the paper (the most important.

Homeostasis Stable internal environment Involves 1. Receptor – senses stimulus 2. Control Center – receives and processes info 3. Effector – responds.

The Challenge: Melting these 6 ice cubes as fast as possible. How to do it? Make these 6 ice cubes last as long as possible? How to do it?

Homeostasis Balancing the internal environment. External vs. Internal Environment What is the difference?

Big Bang Theory

Homeostasis Balancing the internal environment. External vs. Internal Environment What is the difference?

Hormones and Homeostasis. Homeostasis  Maintaining a stable internal environment despite unstable external conditions  Examples of systems with homeostasis.

Mechanisms of Homeostasis

Homeostasis A condition in which the internal environment of the body remains relatively constant despite changes in the external environment. Examples.

Homeostasis A condition in which the internal environment of the body remains relatively constant despite changes in the external environment. Examples.

Animal Form & Function Homeostasis AP Biology. Definition  Controlling the internal environment  Maintenance of stable internal environment.

#37 How does the body use feedback mechanisms? #37 Warm UP How does the heat in a building know when to turn on and off? Take out Body Systems Practice.

(Foundation Block 4) Homeostasis I By Ahmad Ahmeda

FEEDBACK MECHANISMS & HOMEOSTASIS. HOMEOSTASIS Maintaining the internal environment within a stable range given factors that influence the external environment.

Describe one way your body maintains homeostasis. Put page 1 of your homework packet out on your desk!

Chapter One Part 1 Introduction to Anatomy and Physiology Characteristics of Life What is Anatomy and Physiology Maintenance of Life.

Temperature Regulation We need to regulate body temperature to provide the optimum conditions for enzyme-catalysed reactions to be carried out.

LT- Today, we will analyze how feedback mechanisms (loops) help to maintain homeostasis by applying our understanding to how glucose levels are controlled.

An Introduction to Anatomy and Physiology

VITAL SIGNS ANATOMY & PHYSIOLOGY.

Response to Environmental Changes

Maintaining the balance

Feedback Loops -feedback loops manage homeostasis in the body through the nervous system -negative feedback is the regulating of a system so that it doesn’t.

Homeostasis and Feedback Loops

Homeostasis of Plasma Glucose Concentration

Maintaining homeostasis

Blood glucose control mechanisms

Copyright Pearson Prentice Hall

Plasma Glucose Homeostasis

Balancing the internal environment

Dr. MUNAZA KHATTAK ASISTANT PROFESSOR PHYSIOLOGY DEPARTMENT PMC

Homeostasis A condition in which the internal environment of the body remains relatively constant despite changes in the external environment. Examples.

10th Grade Biology Objectives 5-8

Plasma Glucose Homeostasis

Notes: Homeostasis.

Homeostasis Presentation

Homeostasis of Plasma Glucose Concentration

Presentation transcript:

EH205 Review #1: Homeostasis September 12, 2011

Homeostasis and blood glucose Blood glucose is an example of a _________ variable. What is the controlled variable? regulated Insulin

Teleologically and mechanistically Why do we need to control levels of blood glucose? How do we control levels of blood glucose?...

How do we control levels of blood glucose? Stimulus: Increased blood glucose level Sensor: islet cells of pancreas Integrating center: islet cells of pancreas Effector: islet cells of pancreas * Afferent pathway * Efferent pathway Response: secretion of insulin - feedback Set point: <100mg/dl

Temperature Homeostasis and Pathophysiology Stimulus: Change in regulated variable Sensor Integrating center Set point Afferent pathway Efferent pathway Response - feedback Effector Hyperthermia Fever Brain damage Tumor Paralysis Drugs Anesthesia Heat exhaustion Heat stroke

Quiz!

T/F: Controlled variables are always regulated subconsciously False! Taking off extra clothing when you feel hot is one example of altering a controlled variable (body temperature).

What is the most accurate portrayal of a controlled variable over time? A regulated variable? time Set point time Set point time Set point Controlled var. Regulated var.

Before a fever “breaks”, the patient is considered: Hyperthermic Normothermic Hypothermic Hyperthermic Normothermic Hypothermic

Both people have been exercising in extremely hot conditions. Which one would you be more concerned about w.r.t. heat stroke?