Please enable JavaScript.
Coggle requires JavaScript to display documents.
Nervous System (Senses (Sense Receptors Based on Stimulus TYPE…
Nervous System
Senses
-
-
Eye
Components
-
-
Vascular Layer: CHOROID. Nourishes other layers. Pigment absorbs light and prevents scattering. Continuous with ciliary body: a muscle that changes shape of the lens
Inner Layer: RETINA. Photoreceptors. Axons from photoreceptors converge to form optic nerve. Rods detect light and dark (dim lighting). Cones detect color, best in bright light.
-
-
-
-
VISUAL PATHWAY: Cornea to Lens > Retina > Optic Nerve > Optic Chiasm > Optic Tract > Midbrain > Thalamus > Primary Visual Cortex
Olfaction
-
Olfactory Pathway
Olfactory Sensory Neurons > Olfactory Bulb > Olfactory Tract > Limbic Region OR Primary Olfactory Cortex (temporal lobe)
Gustation
Components
Taste buds (chemoreceptors) on Tongue, Inner Cheeks, Pharynx, Palate, and Epiglottis
-
GUSTATION PATHWAY: Taste Buds > Cranial Nerves > Medulla Oblongata > Thalamus > Primary Gustatory Cortex in insula
Ear
Components
Auricle (pinna): Gathers & funnel sound waves, amplify
Tymponic Membrane: Vibrates, transmits vibrations.
-
-
HEARING PATHWAY: Vestibulocochlearnerve (Cochlear nerve + vestibular nerve) > Cochlear Nerve > Medulla Oblongata > Pons > Midbrain > Thalamus > Primary Auditory Cortex of Temporal Lobe
-
-
Neurons
Major Components
-
-
-
Myelin Sheath (insulates, makes signal travel faster)
Chromatophilic Substance: Dense Region of Rough E.R. and ribosomes in cytoplasm (outside nucleus). Creates Plasma Membrane and other proteins
-
-
-
-
-
-