Homeostasis and response

Slides:

Advertisements

Similar presentations

Title: Reflex Actions Learning Objectives What is a reflex?

Advertisements

How a Stimulus Elicits a Response

How and why do organisms respond to changes in their environment? Can you list what is required for a coordinated response? What makes up the CNS? Can.

35-3 Divisions of the Nervous System

What is the function of the nervous system? Sensory Input: action of getting information from the surrounding environment. Things are being sent to the.

Learning question: How do animals detect stimuli?

Structure of a Neuron. 1. cell body 2. nucleus 3. dendrites 4. axon 5. Schwann cell nucleus 6. myelin sheath 7. node of Ranvier 8. Schwann cell 9. terminal.

Synapses and Reflex Action. Synapse Neurons are not continuous Synapse is “The junction across which a nerve impulse passes from an axon terminal to a.

Nervous System. Learning Outcomes Understand the role of the Nervous System Understand what Stimuli, Receptors and Effectors are Understand what the role.

Presented by: Jessica Forbes. Introduction If you touch a hot stove, you do not stop to think about how your body tells you that it’s hot This is an example.

Learning Outcome Describe the structure of the brain, including cerebrum, cerebellum, medulla and hypothalamus. Describe the functions of the different.

Objectives To identify the roles of the three types of neurons and the transmission pathway of a reflex arc. To analyze case studies (patient symptoms)

The Nervous System. Define the following terms: Nerve system Receptor Stimulus Neuron Impluses Effector Brain Synapse In paragraph/diagram form, explain.

The Peripheral Nervous System The P.N.S.. Peripheral Nervous System Somatic Nervous System (___) – ________________________________ – Motor nerves – Messages.

Aim: What are the parts of a reflex arc? I. Reflex – involuntary response to a stimulus. A. Stimulus – any change in the environment that causes a response.

The Nervous System and Reflex Arcs IGCSE Biology.

Aim: What is a reflex arc?

Control and Coordination

B1 Topic 2 Responses to a changing environment

Name parts of the organs involve in the reflex arc

Nervous System.

Next page Unit B6 Brain and Mind.

CHAPTER 13 The Nervous System.

Neurones and the Reflex Arc (NAT 5 ONLY)

Nerves & Reflexes.

Assignment # Nervous Regulation and Reflex Arcs

Lesson starter What is the central nervous system made up of?

Spinal reflexes The reflex arc.

The nervous system.

The Nervous System.

iGCSE Biology Section 2 lesson 8

Nervous System Chapters 8 and 9.

Reflex Arcs Nerve impulse pathways that are responsible for involuntary actions Look like the pathway you drew and labeled: Receptor to Sensory neuron.

TOPIC: Regulation AIM: How does the nervous system regulate the body

Nervous System By the end of the lesson you should be able to

How a Stimulus Elicits a Response

The Nervous System.

The Nervous System Objectives:

Nervous Tissue.

Homeostasis and Feedback Loops

KA 1: Divisions of the nervous system and parts of the brain

Module 5 Communication, homeostasis & energy

Nervous System.

HOMEOSTASIS EXAMPLES.

Knowledge Organiser – Homeostasis and the Human Nervous System

Nervous System.

Reflex Lecture Chapter 7.

The Central Nervous System (CNS)

How the Nervous System Works

The nervous system.

The Nervous System (Ch.18)

The Nervous System.

Nerves & Reflexes.

How it maintains homeostasis

Nervous System By the end of the lesson you should be able to

Notes Ch. 11D Nervous System II

How do cells in the body communicate?

Types of Neurons Dendrite Types of Neurons There are 3 types of neurons. Sensory Neurons  Neurons located near receptor organs (skin, eyes, ears).

Agenda Announcements Do Now, hand back graded work (12) Notes (25)

Nerve Pathways.

Why are reflexes important?

The Nervous System.

Central Nervous System

The Nervous System Lesson objective – to be able to explain how an electrical impulse can pass from one nerve to another.

B1 Topic 2 Responses to a changing environment

Sponge 5 Sensory neurons: detect stimuli and transmit signals to the brain and the spinal cord Interneurons: receive signals from sensory neurons and relay.

Presentation transcript:

Homeostasis and response LESSON 3

Explain what this diagram is showing

Reflex actions A reflex action is a way for the body to automatically and rapidly respond to a stimulus to minimise any further damage to the body. It follows this general sequence and does not involve the brain: stimulus → receptor → sensory neurone → relay neurone → motor neurone → effector → response The nerve pathway followed by a reflex action is called a reflex arc. For example, a simple reflex arc happens if we accidentally touch something hot. Receptor in the skin detects a stimulus (the change in temperature). Sensory neurone sends impulses to relay neurone. Motor neurone sends impulses to effector. Effector produces a response (muscle contracts to move hand away).