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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
what is the function of the iris and of the pupilthe iris works like the diaphragm of a photographic camera as it has muscles that contract or relax
what are the main structures of the human eye the major structures of the human eye are the cornea the iris the pupil the ciliary muscles the
what is vision why is vision important for life on earthvision is the ability of some living beings to perceive to differentiate and to interpret
according to the stimuli they collect how are the sensory receptors classifiedthe sensory receptors are divided according to the stimuli they get
what are sensory receptorssensory receptors are structures specialized in the acquiring of information such as temperature mechanical pressure ph
how does the nervous system get information about the external environment the organs and the tissuesinformation about the conditions of the external
what is the neuromuscular synapseneuromuscular synapse is the structure by which the neural impulse passes from the axon of a motor neuron to the
fluoxetine is an antidepressant drug that presents an action mechanism related to the synaptic transmission what is that mechanism fluoxetine is a
since neurotransmitters are not consumed in the synaptic process what are the mechanisms to decrease their concentrations in the synaptic cleft after
what are some significant neurotransmittersthe following are some neurotransmitters adrenaline epinephrine noradrenaline norepinephrine dopamine
what is the structure through which the neural impulse is transmitted from one cell to another what are its parts the structure by which the neural
what is the mechanism by which the neural impulse is transmitted along the axon the neural impulse is transmitted with the neuronal membrane through
how different are the concepts of action potential resting potential and excitation threshold concerning neuronsaction potential is the maximum
what is the excitation threshold of a neuron how does this threshold relate to the all-or-nothing rule of the neural transmissionthe excitation
how is the depolarization of the neuronal plasma membrane generated how does the cell return to its original restwhen the neuron receives a stimulus
how do the sodium and potassium ions maintain the resting potential of the neuronthe plasma membrane of the neuron when at rest maintains an electric
which is the normal sign of the electric charge among the two sides of the neuron plasma membrane what is the potential difference voltage generated
what is the nature of the stimulus received and transmitted by the neurons neurons receive and transmit chemical stimuli by neurotransmitters
what are the protective structures of the central nervous system present in vertebrates in vertebrates the brain and the spinal cord are protected by
using examples of invertebrate nervous systems how can the process of evolutionary cephalization be described considering the instance of
what is the antagonism between the sympathetic and the parasympathetic neural actionsin general the actions of the sympathetic and the
what are the two divisions of the autonomic nervous systemthe autonomic nervous system is separated into the sympathetic nervous system and the
what are the functional divisions of the nervous systemfunctionally the nervous system can be separated into the somatic nervous system and visceral
how is it explained that a person with the spinal cord sectioned at the cervical level is still able to perform the patellar reflex the arch reflex