Osmoregulation.

Slides:

Advertisements

Similar presentations

Homeostasis in humans- part 1

Advertisements

Water regulation in the kidney

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.

Animal Survival Water and Waste.

Water Balance in Animals

OSMOREGULATION.

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

F214: Communication, Homeostasis and Energy 4. 2

Osmoregulation Maintaining homeostasis in solute concentrations.

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

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

The kidney Topic 11.3.

SBI 4U: Metablic Processes

Topic 11: Human Health and Physiology

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.

Water Balance. Balancing Act Water is vital to life. It is required for both chemical reactions and the excretion of waste. Water is vital to life. It.

Kidney Failure. Learning Objective Success Criteria To know about kidney failure Outline the problems that arise from kidney failure and discuss the use.

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

Excretory System.

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

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.

Regulation of Secretion and Actions of Antidiuretic Hormone Process Diagrams Step-by-Step Copyright © 2007 by John Wiley & Sons, Inc.

Blood Water Homeostasis (Osmoregulation)

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.

Temperature Control Temperature rise detected by receptors in the body

Osmoregulation The solute and water content of the internal environment must be regulated. Known as osmoregulation.

7.6 Define gel electrophoresis. Briefly, describe how it works.

1 Osmoregulation The solute and water content of the internal environment must be regulated. Known as osmoregulation.

Hormonal Control of Osmoregulation & Excretion WALT That water concentrations are regulated by a hormone called ADH That ADH effects the permeability.

SBI 4U: Metablic Processes Homeostasis: The Kidneys

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.

Higher Human Biology Unit 3a Chapter 14b The Brain.

What’s the link?.

Structure Outer part of each kidney – CORTEX Inner part of each kidney – MEDULLA Blood enters the kidney through the RENAL ARTERY and leaves through the.

Hormones u Chemical messengers carried in the blood plasma u Affect cells with the correct receptors = target cells u Secreted into the blood by endocrine.

Learning Goal: I will describe the anatomy and physiology of the excretory system and how it maintains homeostasis w.r.t water, ionic and pH balance. Kidney.

Quick Quiz - hormones How do hormones move around the body?

Excretion and Homeostasis

Ch. 14 Part 5 Loop of Henle, Distal Convoluted Tubule, Collecting Duct, Osmoregulation.

Chapter 10 – Excretion.

Sub-topic (a) Homeostasis

Gianfilippo Ruggiero and Emma Wakefield

Homeostasis Chapter 28.

Only need 50% function of kidneys

11.3 Excretory System.

Excretory System and Osmoregulation

Hormones and the Endocrine System

Kidney Failure.

AQA GCSE HOMEOSTASIS AND RESPONSE PART 2

Ultrafiltration and Selective Reabsorption

Urinary System: Outcome: I can explain why anti-diuretic hormone (ADH) is a critical part of the urinary system. Drill: What are differences between cortical.

Communication and Homeostasis

Homeostasis and Negative Feedback Mechanisms

B5f2 Excretion.

Revision – 6 mark questions

Kidneys and Homeostasis

H Plant Growth Regulators and Animal Hormones (E.S)

Antidiuretic hormone (ADH) Good example of Negative feedback loop

Antidiuretic hormone (ADH) Good example of Negative feedback loop

Homeostasis of body fluid

Presentation transcript:

Osmoregulation

Spec (d) the control of the water potential of the blood To include the role of osmoreceptors in the hypothalamus, the posterior pituitary gland, ADH and its effect on the walls of the collecting ducts.

Learning Objective Success Criteria Explain the control of water potential of the blood Explain how the water potential of the blood is controlled, including the role of osmoreceptors in the hypothalamus, the posterior pituitary gland, ADH and its effect on the wall of the collecting duct

State whether water is gained or lost from each item Urine Food Drink Metabolism (e.g respiration) Faeces Sweat Exhaled air

Osmoregulation Osmoregulation is the control of water levels and salt levels in the body. Correct balance must be maintained to prevent problems with osmosis

Permeability of the Collecting Duct In the absence of ADH the collecting duct wall is impermeable to water The walls of the collecting duct respond to the level of antidiuretic hormone (ADH) in blood.

The effect of ADH on the collecting duct wall 7

TASK: Turn the Following points into a storyboard 1. ADH is detected by cell surface receptors 2. Enzyme controlled reactions 3. Vesicles containing water permeable channels (aquaporins) fuse to membrane 4. More water can be reabsorbed

Osmoreceptors Neurosecretory cells Osmoreceptor - Ψ H20 H20 The water potential of the blood is monitored by osmoreceptors in the hypothalamus of the brain Negative water potential causes the OR to lose water and shrink which stimulates the NS cells Neurosecretory cells Osmoreceptor - Ψ H20 H20 Osmoreceptor ADH

Neurosecretory cells ADH ADH ADH ADH Hypothalamus Posterior Pituitary Gland When neurosecretory cells are stimulated they send action potentials down their axons that cause the release of ADH ADH ADH ADH ADH

ADH ADH then enters the blood capillaries near the PPG and acts on the cells of the collecting ducts

Negative Feedback Once the water potential rises less ADH is released ADH is slowly broken down therefore there will be less in the blood so collecting ducts receive less stimulation

TASK Complete the flow diagram

Extension Activity Biofactsheet

Plenary: PPQs

PPQ – ADH 2013 See Print out

Markscheme

Markscheme continued