BIOL 2410 Lecture Notes - Lecture 19: Hair Cell, Thalamus, Itch
2 Nov 2016
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Document Summary
The afferent branch of our nervous system provides us with information about or inside and outside environment. We use our senses to acquire information about our environment. We use our senses to acquire information about our internal environment. * we don"t consciously process this information. O2/co2 concentration in blood internal temperature ph of blood and csf. Somatic - uses a single sensory neuron in the dermis. Special senses - specialized set of tissues that collect information from one given environment that send it to the appropriate area of the brain. Proprioception - balance - positional information of the body. Visceral - trunk of the body - centre - organs. Somatic - everything outside the trunk of the body, like limbs. Stretch of the gi tract - stretches out when food enters, this signals for more digestive enzymes and juices to come in from pancreas, liver and gall bladder. Sensory systems must receive a physical stimulus.
