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are hormones only proteinssome hormones are proteins such as insulin glucagon and adh others are derived from proteins changed amino acids like
how does the circulatory system participate in the functioning of the endocrine systemthe circulatory system is fundamental for the performance of
what are target organs of the hormonestarget organs target tissues and target cells are those exact organs tissues and cells upon which each hormone
what are hormoneshormones are substances secreted by the endocrine glands and collected by the circulation that act to make effects upon exact organs
why is the endocrine system considered one of the integrative systems of the body what is the other physiological system that also has this
what is the histological nature of the glands how are they formedthe glands are epithelial tissues they are made of epithelium that throughout the
what is the difference between the endocrine gland and the exocrine glandendocrine gland is a gland whose secretions known as hormones are collected
why is there a sense of pressure change inside the ear when someone goes down a mountainthe pressure inside the middle ear is keeps equal to the
what is the vestibular system how does it operatethe vestibular system is the part of the ear that participates in the control and regulation of the
what is the tympanum in which part of the ear is it located and what is its functionthe tympanum or ear drum is a membrane located in the middle ear
what are the structures that form the external ear what is its functionthe internal ear comprises the pinna or auricle and the auditory canal its
what are the main parts of the human ear the human ear is separated into three mains parts the external ear the middle ear and the internal
what are the structures that participate in the human auditory sensitivity the structures of the human auditory sensitivity are the ears external
what are presbyopia and astigmatismpresbyopia is the visual impairment in which there is loss of the cililary muscle strength therefore reducing the
how can the visual deficiencies known as myopia and hypermetropia be optically explained myopia is the visual condition in which the images are
what are the near point and the far point of the vision the near point is the closest distance among an object and the eye that makes possible the
what is visual accommodationvisual accommodation is the phenomenon of varying the curvature of the crystalline lens to make possible the variation of
since the visual images are projected in an inverted manner on the retina why dont we see things upside downas the crystalline lens is a convex
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