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Crash Course: Nervous System P. 2 Divisions of the N.S. Integrative Sensory Motor Crash Course: Nervous System 10 bullets

10.1 Basic Structure and function of the NS Sponge: Set up Cornell Notes on pg. 3 Topic: 10.1 Basic Structure and function of the NS Essential Question: What is the difference between neurons and neuroglial cells? Textbook: 356-358 10.1 Basic Structure and function of the NS 2.1 Atoms, Ions, and Molecules What is the difference between neurons and neuroglial cells? TAPE SYLLABUS FROM FIRST SEMESTER ON P.1

Objective SWU: the general parts and functions of the nervous system SW: classify the 3 major functions of the nervous system in a tree map

The Nervous System 1m47

Chapter 10 Nervous System The nervous system is composed predominantly of neural tissue Also has… Blood vessels Connective tissue

Neural Tissue Neural tissue consists of two cell types: Neurons aka nerve cells: are specialized to react to physical and chemical changes in their surroundings

Neural Tissue Neural tissue consists of two cell types: 2. Neuroglial cells: surround, support, and nourish neurons Cell body

Functions of the Nervous System 3 major functions of N.S.: Sensory Integrative Motor

Functions of the Nervous System Sensory receptors: Gather information by detecting changes inside and outside of the body Outside: Light & Sound Intensities Inside: Temperature Oxygen Levels pH Levels

Functions of the Nervous System Integrative: Convert information from sensory receptors into nerve impulses Create sensations, add to memory, and produce thoughts

Motor Functions: Responsive structures called effectors Muscles Glands Draw on Pg. 2

Divisions of the Nervous System

Divisions of the Nervous System Central Nervous System (CNS): The body’s master control Brain Brainstem Spinal cord

Divisions of the Nervous System Peripheral Nervous System (PNS) The body’s link to the outside world Nerves

Divisions of the P.N.S. Sensory (Afferent) Division: P.N.S. to C.N.S. The PNS can further be divided: Sensory (Afferent) Division: P.N.S. to C.N.S. Contains receptors

Divisions of the P.N.S. Motor (Efferent) Division: The PNS can further be divided: Motor (Efferent) Division: C.N.S. to rest of body Sends info to effectors

Divisions of the P.N.S. The Motor division can further be divided: Somatic nervous system: Oversees conscious activities Ex: skeletal muscle contraction Autonomic nervous system: Controls involuntary actions Ex: heartbeat and glands conscious Involuntary or unconscious

Divisions of the P.N.S. The Autonomic division can further be divided: Sympathetic nervous system: “Fight or Flight” Parasympathetic nervous system: “Rest and Digest” conscious Involuntary or unconscious

Divisions of the Nervous System Video (4m38s) Cut if late start

In a nutshell…. The nervous system can: Detect changes in the body Make decisions based on the info received Stimulate muscles and/or glands to respond Counteract changes to maintain homeostasis

Crash Course: Nervous System (6m04) P. 2 Crash Course: Nervous System (6m04) 10 bullets https://www.youtube.com/watch?v=x4PPZCLnVkA