Nervous System - Animals: Nervous Animals: system system...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Animals: Nervous Animals: Nervous system system Neuron and connection of neurons Outline Outline 1. Key concepts 2. An Overview and Evolution 3. Human Nervous System 4. The Neurons 5. The Electrical Signals 6. Communication between Neurons 7. Nervous System Organization 8. Key Terms 9. Conclusions Key Concepts: Key Concepts: 1. Nervous systems are composed of neurons 2. Neurons are excitable cells 3. With stimulation, the polarity of charge across the membrane reverses from negatively charged inside the cell to being positively charged
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 Key Concepts: Key Concepts: 4. Action potentials are changes in the polarity of the cell membrane 5. Information flow starts with action potentials, which self propagate along the plasma membrane 6. Chemical signals released from a neuron stimulate or inhibit the adjoining neuron, muscle cell, or gland cell 7. Information flow depends on integration of signals Nervous System Function Nervous System Function Nervous systems perform 3 over lapping functions 1. Sensory input 2. Integration 3. Motor output Evolution of Neural Systems Evolution of Neural Systems 1. No centralized processing a. Nerve “net”> Hydra b. “ring”> starfish 2. Beginning of centralized
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 10

Nervous System - Animals: Nervous Animals: system system...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online