1. Ch. 35 Nervous System Sec 1 = Human Body Systems Key Concepts:
Describe how the human body is organized.
Explain homeostasis.
Recall levels of organization: cellstissuesorgansorgan systems

2. The 11 systems work together to maintain homeostasis (maintaining internal conditions despite external environment.)
Nervous
Integumentary
Respiratory
Digestive
Excretory
Skeletal
Muscular
Circulatory
Endocrine
Reproductive
Lymphatic / Immune

3. 4 Types of Tissue Epithelial = cover interior & exterior body surfaces
Connective = provides support
Muscle = enables movement
Nervous = transmits nerve impulses

4. Sec 2 The Nervous System
Controls & coordinates functions throughout body
Responds to internal and external stimuli
Specialized cells carry impulses = neurons (sensory, motor, interneurons)

5. The Nerve Impulse
A neuron is stimulated by another neuron or by the environment
Impulse travels rapidly down the axon away from cell body toward axon terminals
Na+ and K+ ions allow for action potential

6. Sec 3 Divisions of Nervous System
CNS = relays messages, processes info, analyses info
PNS = receives info from environment, relays commands from CNS to organs & glands

8. 5 categories of sensory receptors:
Sec 4 The Senses
5 categories of sensory receptors:
pain
thermo
mechano
chemo
photo