Soinc Anatomy

Functions of Nervous System
1. Sensory Function
2. transmit info to processing areas of the brain and spine
3. Integration Function
4. Motor Function

Sensory Function
Gathers information from both inside and outside the body

Integration Function
Processes the information in the brain and spine

Motor Function
Sends information to the muscles, glands, and organs so the can respond appropriately

Nervous System does…
The Nervous System controls and coordinates all essential functions of the body including all other body systems allowing the body to maintain homeostasis or its delicate balance

Divisions of the Nervous System
Central Nervous System CNS
Peripheral Nervous System PNS
Somatic Nervous System
Autonomic Nervous System
Sympathetic Nervous System
Parasympathetic Nervous System

Central Nervous System CNS consists of
Consist of the brain and spinal column

Peripheral Nervous System PNS consist of
Consist of the Muscles

Somatic Nervous System
voluntary Relays information to and from skin and skeletal muscles

Autonomic Nervous System
Involuntary relays information to internal organs

Sympathetic Nervous System controls
Controls Organs in times of stress

Parasympathetic Nervous System controls
Controls organs when body is at rest

Basic function cell of nervous system
transmits impulses up to 250 mph

Parts of Neuron
Dendrite, Cell Body, Axon, Schwann Cells, Myelin Sheath, Node of Ranvier

Receives stimulus and carries its impulses towards the cell body

Cell Body
Nucleus and most of cytoplasm

Fiber which carries impulses away from cell body

Schwann Cells
Cells which produce myelin or fat layer in the Peripheral Nervous System

Myelin Sheath
Dense lipid layer which insulates the axon – makes the axon look gray

Node of Ranvier
gaps or nodes in the myelin sheath

Order in which impulses travel
from dendrite to cell body to axon

Three Types of Neurons
Sensory Neurons
Motor Neurons

Sensory Neurons
brings messages to CNS

Motor Neurons
carry messages from CNS

between sensory and motor neurons in the CNS

1-1In regard to lipids, the term unsaturated refers to A) the ring structure of steroids. B) the lack of double bonds between adjacent carbon atoms in a fatty acid. C) glycerol, which acts as an anchor for joined fatty acids. …

glial cells Supporting cells in the nervous system. Works to allow neurons to operate glia Non-excitable support cells in the nervous system. Size: generally smaller than nerve cells. ~1.5×10^11 cells. ratio to to neurons is between 1:1 and 5:1. Half …

Chapter 01 Major Themes of Anatomy and Physiology True / False Questions 1. Sometimes anatomical terms come from origins that do not lend any insight into their meaning. TRUE Blooms Level: 1. Remember Gradable: automatic HAPS Topic: Module A05 Basic …

Which of the following is an important characteristic of lipids? They can be linked into long chains. They dissolve in water. They can be converted to hormones. They are nonpolar. They are nonpolar. pg33 What is a substance that can …

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