BIO 365S Lecture Notes - Lecture 10: Special Senses, Sensory System
Sensory System
Cranium protects brain. 15-20% blood goes to the brain. 20% when
stressed.
Need to have 5 senses to pick up physical stimulus.
CNS
Sensory system transfers sensory into language brain understands
(action potentials)>
•General senses
• Receptors that are widely distributed
throughout the body; can come from
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outside/inside.
• Skin, various organs and joints
• Special senses
• Specialized receptors confined to
structures in the head
• Eyes, ears, nose and mouth
Sensory Receptors
Simple receptors: just a neuron with free nerve endings. Pain receptor.
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