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q what are the structures that participate in the human auditory sensitivitythe structures of the human auditory sensitivity are the ears middle and
q what are astigmatism and presbyopiapresbyopia is the visual impairment in which there is loss of the cililary muscle strength thus reducing the
q how can the visual deficiencies known as myopia and hypermetropia be optically explainedmyopia is the visual condition in which the images are
q what are the near point and the far point of the visionthe near point is the closest distance between the eye and an object that makes possible the
q what is visual accommodationvisual accommodation is the phenomenon of varying the curvature of the crystalline lens to make possible the difference
q what kind of structure is the crystalline lens what is its functionthe crystalline is a converging spherical lens this natural lens has the
q since the visual images are projected in an inverted manner on the retina why dont we see things upside downsince the crystalline lens is a convex
q which is the part of the human visual system where the receptors that sense light ie the photoreceptor cells are located how do those cells workthe
q what is the function of the pupil and of the iristhe iris works like the diaphragm of a photographic camera since it has muscles that relax or
q what are the major structures of the human eyethe major structures of the human eye are the iris the cornea the pupil the ciliary muscles the
q what are the structures that compose the human vision apparatusthe organs of the human visual apparatus are the eyes the optical nerves and the
q how does photosensitivity in annelids cnidarians and worms differ from insects cephalopods and vertebratesin the first mentioned group of animals
q what is vision why is vision important for life on earthvision is the ability of some living beings to distinguish to perceive and to interpret
explain theory of evolution through natural selectionthe third theory of evolution through natural selection was put forward jointly by darwin and
explain the role of cuvier in animal taxonomy cuvier 1769-1832 was critical of lamarcks evolutionary concept which thereafter remained in oblivion
explain the taxonomy of lamarcklamarcks taxonomy was mainly static in nature and his classification does not show its true value to the development
q according to the stimuli they collect how are the sensory receptors classifiedthe sensory receptors are classified according to the stimuli they
q what are sensory receptorssensory receptors are structures specialized in the acquiring of information mechanical pressure like temperature ph
explain the work of linnaeus in animal taxonomyin 18th century the work of linnaeus and his followers haartman 1751 1764 kolreuter 1761-66 helped
q how does the nervous system get information about the external environment the organs and the tissuesinformation about the conditions of the
q what is the neuromuscular synapseneuromuscular synapse is the structure through which the neural impulse passes from the axon of a motor neuron to
q fluoxetine is an antidepressant drug that presents an action mechanism related to the synaptic transmission what is that mechanism fluoxetine is a
q since neurotransmitters are not consumed in the synaptic process what are the mechanisms to reduce their concentrations in the synaptic cleft
q what are some important neurotransmittersthe following are some neurotransmitters serotonin noradrenaline norepinephrine histamineacetylcholine
q how does synaptic transmission between neurons take placethe propagation of the action potential along the axon reaches the region immediately