Everything Flashcards
(31 cards)
Subdivision of the ANS embedded in the GI tract; contains - 100 million neurons and regulates local motility, secretion and blood flow
Enteric nervous systems
Spatial organisation of auditory structures (basilar membrane, cochlear nucleus, auditory cortex), based on frequency
Tonotopic mapping
In Rods, light energy activates the G-protein on photoreceptors which causes the activation of
Rhodopsin and reduced cyclic GMP
In the dark, what makes up the dark current in the absence of a stimulus
Influx Sodium and Calcium
Small unmyelinated fibres that conduct slow pain and temperature
C Fibres
Ganglia are located where in the parasympathetic division
Near or in target organs
G-Protein-coupled receptors located on parasympathetic target tissues. Mediate slower, prolonged responses
Muscarinic Acetylcholine Receptors
Division of the peripheral nervous system that regulates involuntary physiological processes, including heart rate, blood pressure, digestion, and respiration
Autonomic Nervous System
Specialised capillary network through which hypothalamic parvocellular neurosecretory cells deliver hormones to the anterior pituitary
Hypophyseal Portal System
Uses interaural time differences for low frequencies and intensity differences for high frequencies
Duplex Theory of Sound Localisation
Located in supraoptic and paraventricular nuclei; project to posterior pituitary release oxytocin or vasopressin directly into circulation
Magnocellular Neurosecretory Cells
Hypothalamic region with both magnocellular and parvocellular neurosecretory cells; coordinated endocrine and autonomic output
Paraventricular Nucleus
Large onion-like receptor deep in the dermis, rapidly adapting and highly sensitive to high-frequency vibrations and deep pressure.
Pacinian Corpuscle
Ganglia are located where in the parasympathetic division
Near or in target organs
Six layers including magnocellular input and parvocellular input into Layer 4, arranged in orientation specific columns
Visual cortex
The specific area of skin where a stimulus must occur to activate a neuron
Receptive field
Neurotransmitter and Receptor located at the Ganglion of preganglionic and postganglionic neurons in sympathetic and parasympathetic divisions
Acetylcholine and Nicotinic Receptors
Slowly adapting mechanoreceptor located in the basal epidermis; detects sustained pressure and texture
Merkel’s Disk
Neurotransmitters released from varicosities
Diffuse synapse
Neurotransmitters released from specific areas called active zones
Discrete synapses
The indirect pathway of visual information
Photoreceptor to Horizontal or Amacrine Cells to Retinal Ganglion Cells
The direct pathway of visual information
Photoreceptor to Bipolar cells to Retinal Ganglion cells
Large diameter, myelinated fibres transmitting fast, discriminative touch signals (e.g. from Merkle or Meissner receptors)
Type A(beta) fibres
Parasympathetic preganglionic neurons originate in what two regions of the spinal cord
Cranial and Sacral