Learning outcomes... Most: explain how water levels are maintained by a balance between input and output Should: explain how the kidneys respond to changes.

Slides:

Advertisements

Similar presentations

Homeostasis in humans- part 1

Advertisements

Nervous System/ Endocrine System

Partnership for Environmental Education and Rural Health

Feedback Mechanisms Response to Environmental Changes.

Learning Intentions I can explain the process of homeostasis in the control of blood water concentration if it varies from the norm. I understand the importance.

B4 - Homeostasis What you should know…..

B4: Homeostasis Maintenance of a constant environment within a body.

B2 K EEPING H EALTHY Lesson 13: Your Kidneys. O BJECTIVES MUST describe how the kidneys respond to changes in blood plasma concentration SHOULD explain.

Animal Survival Water and Waste.

Homeostasis Thermoregulation & Fluid regulation. Thermoregulation.

Water Balance in Animals

Regulation of body fluids HBS 3A. Body fluids Body fluids consist of Body fluids have different names in different locations. Intracellular fluid (c_______________)

Revision of controlling conditions. Controlling conditions 1.The conditions inside your body are known as its i…………. e………………. 2.Your body has to keep.

Normal diet Drunk plenty of water Has been exercising but not drunk anything Who’s urine? MATCH UP!

The Urinary System Excretion: The removal of metabolic wastes from the

Physiological Homeostasis Chapter 33. Internal Environment  Millions of cells in a body make up a community  Different parts of the body dependent on.

Keystone Anchor BIO.A.4.2 Explain mechanisms that permit organisms to maintain biological balance between their internal and external environments.

Osmoregulation – hormonal control

Excretion WASTE PRODUCTS OF BODY FUNCTIONS ARE REMOVED BY THE KIDNEYS Why do animals need an excretory system? What parts make up the excretory system?

SBI 4U: Metablic Processes

OSMOREGULATION CONTROL OF WATER BALANCE © 2008 Paul Billiet ODWSODWS.

Intro  The body adjusts for high or low water loss by increasing or decreasing urine input  These changes are causes by the nervous system and 2 hormones.

The Internal Environment overview.

The maintenance of a constant internal environment.

Unit 3A Human Form & Function Cells, metabolism & regulation Regulation of fluid composition.

Maintaining Water-Salt/Acid-Base Balances and The Effects of Hormones

13.1 The Principles of Feedback Mechanisms 13 Feedback Mechanisms.

Maintaining “balanced” body function Homeostasis.

Animal Physiology – Osmoregulation & Excretion (Lecture Version) Chapter 44.

Unit 3A Human Form & Function Cells, metabolism & regulation Regulation of fluid composition.

Receptors are groups of specialised cells. They can detect changes in the environment, which are called stimuli, and turn them into electrical impulses.

WATER BALANCE. Water Balance  In a general sense:  increased water intake = increase urine output  exercise or decreased water = reduce urine output.

Homeostasis. Homeostasis is the maintenance of equilibrium, or constant conditions, in a biological system by means of automatic mechanisms. In the 19th.

© SSER Ltd.. Water Balance The concentration and volume of the urine, excreted by mammalian kidneys, is determined by the amount of water reabsorbed from.

SBI4U-NOV 26,2012 Kidney Disease. Diabetes Insipidus (DI) Destruction of ADH-producing cells of the hypothalamus or destruction of hypothalamus- pituitary.

Control of The Internal Environment. Water Gain and Water Loss Mammals gain and lose water in several ways. Over the course of the day water gain is equal.

Small volume of concentrated urine passes to the bladder Large volume of dilute urine passes to the bladder WATER CONTENT OF BLOOD NORMAL BRAIN KIDNEY.

Kidneys are very important in maintaining homeostasis. They remove cellular waste from the bloodstream.

Excretory System Thinking Questions. Describe the functions of a person's urinary system.

What is meant by tolerable limits Mechanisms never allow it to go too high or too low What two ways does an animal have of communicating a response? Hormones.

Water Balance. More water in means more urine out. Our body’s water balance is regulated by our nervous system and our endrocrine system.

Homeostasis & Body Temperature National 4 &5 – Multicellular Organisms.

WARM UP 10/4 1. What element has the atomic number of 11? 2. What period is N in? What group? 3. What chemical reaction makes energy for our body? 5. What.

The Pathway of ADH The Effect of SIADH Larry Li

FEEDBACK MECHANISMS. M AINTAINING E QUILIBRIUM  Living versus non-living  Living organisms have the ability to sense and respond to changes in environment.

The Endocrine System Broadcasting throughout the body!

temperature, blood pH, blood glucose, blood calcium, fluid balance

SBI 4U: Metablic Processes Homeostasis: The Kidneys

Homeostasis L.O: to define homeostasis and explain how homeostasis occurs Starter: Year 11 homeostasis quiz – what can you remember from two years ago??!

Water balance in mammals Water balance in mammals is controlled by the kidneys, hypothalamus and the adrenal glands It involves 3 main hormones: Anti-diuretic.

2.75 Describe the role of ADH in regulating the water content of the blood (not in book) Name the different sections of the nephron in order.

The body controls internal conditions by 1…………….. The body 2………….. of the body is kept steady at 37 o C The skin is involved in this process by 3……………..

What’s the link?.

End Homeostasis 5 minute poster

It does not have to do with food… But, you have some in your body Partnership for Environmental Education and Rural Health peer.tamu.edu.

Excretion and Homeostasis

Feedback System - Water

Osmoregulation.

Revision – 6 mark questions

Kidneys and Homeostasis

Practice Quiz #2 Multiple Choice Questions D (Should say B&C) D B A C.

Antidiuretic hormone (ADH) Good example of Negative feedback loop

Antidiuretic hormone (ADH) Good example of Negative feedback loop

Excretory System Hormonal Controls Dysfunction.

Presentation transcript:

Learning outcomes... Most: explain how water levels are maintained by a balance between input and output Should: explain how the kidneys respond to changes in conditions Could: explain the role of ADH in urine concentration and explain it’s effects during alcohol and ecstasy consumption

Key question....what is negative feedback? negative feedback in a control system reverses any changes to the system’s steady state

Most: explain how water levels are maintained by a balance between input and output Water input: Water output:

ADH and the kidneys

What is the function of the kidneys? Maintain body’s water level Filter water, sugar, salt and waste from blood Reabsorb all sugar Reabsorb as much salt and water as is needed Excess is lost as urine

Fluids Excess water (blood plasma) Kidneys remove more from blood Large volume of dilute urine Not enough water (blood plasma) Kidneys remove less from blood Concentrated urine

Should: explain how the kidneys respond to changes in conditions

How does your urine change in different environments Hot temperature Exercise Intake of fluids Intake of salts

Hot temperature Sweat – water loss Kidneys reabsorb water back into blood Small volume of concentrated urine

Exercise Hot – sweat to cool down Lose water through sweat Same as heat – small concentrated volume of urine

Salts Too much – concentrated urine. Why? Reabsorb water into blood to dilute salt concentration

Explain the effect of the following on the kidneys: Crisps Water Exercise

Could: explain the role of ADH in urine concentration and explain it’s effects during alcohol and ecstasy consumption

Anti-diuretic hormone (ADH) Produced by pituitary gland-released into bloodstream What monitors water levels in blood? Hypothalamus/brain Activates pituitary to release ADH in suitable levels ADH release causes the kidney to become more permeable What does this mean? More water re-absorbed Negative feedback Low blood water levels – ADH concentration in blood is increased so kidneys absorb more water Urine is? High blood water levels – ADH concentration in blood is decreased so kidneys absorb less water Urine is?

Stimulus – blood concentration too high (concentration looks at salts etc. So tells you that there isn’t enough water in the blood) Receptors – hypothalamus detect levels Hypothalamus causes an increase in ADH production Effector – kidneys reabsorb more water from blood Response – more concentrated urine

ADH - effects of..... Alcohol: Suppresses release of ADH Kidneys reabsorb less water More water passes out as urine – dehydration Headaches, dizziness – death Ecstasy: Increased release of ADH Reabsorb more water, concentrated urine, swelling of cells