What is an external stimulus?

Q: What is mechanoreceptor ? How mechanoreceptor works ?

A: Introduction: Behavioral manifestation is due to the interplay of stimulus and response. Some sort…

Q: Are the pectoralis major and pectoralis minor antagonistic?

A: Pectoralis is the muscle that helps to connect the chest muscle to the shoulder for connectivity

Q: What is middle ear?

A: The ear is the organ for hearing and balance. The three parts of the ear include the outer ear, the…

Q: Where is crista located?

A: Eukaryotes are the organisms in which nucleus id developed and is surrounded by a membrane.…

Q: Is the nervous system responsible for the dilation of pupil?

A: Yes, ANS (Autonomic Nervous System)  sympathetic branch is known for triggering" flight or fight…

Q: What structure separates the outer ear from the middle ear?

A: Ear consists of three regions : outer , middle and inner .

Q: What is the function of tympanic membrane?

A: Tympanic membrane is also called Ear drum.  It separates outer ear from the middle ear.  When sound…

Q: What is the role of the mucus in detection of smells?

A: Olfaction, also referred to as a sense of smell, is the process to create the perception of a smell.…

Q: What are sensoryreceptors?

A: The nervous system of the body functions in interpreting sensory information, and in maintaining the…

Q: Where is the cochlea located?

A: Cochlea is located in the temporal bone which is present inside the inner ear.

Q: Define the term labyrinth?

A: Labyrinth is the rigid , bony outer wall of the inner ear and in the temporal bone. It consists of…

Q: Which Receptor detects taste?

A: Step 1 The sensory system is a component of the nervous system which is specialized to pick up…

Q: Which Receptor detects smell?

A: Animal physiology is the systematic study of the supporting features, roles, and processes of…

Q: What is the function of the Olfactory Bulb?

A: Introduction: The olfactory bulb is an anatomical structure that is present in the forebrain of…

Q: What are olfactory receptors?

A: Olfactory receptors also called sense receptors, are protein capable of binding odour, They play a…

Q: What is the function of the tympanic membrane (eardrum)?

A: In human body, ears are the hearing organ. They are divided into three main parts as outer, middle…

Q: What are the pain receptors?

A: Pain receptors also called nociceptors are a group of sensory neurons with especialised nerve…

Q: Where Thermoreceptors are located ?

A: Thermoreceptor is a type of receptor consist of advanced nerve cells that can sense temperature…

Q: What are baroreceptors?

A: Sensory receptors sense various stimuli present in the external environment and convert them into…

Q: What do baroreceptors do?

A: Baroreceptor: These are sensors located in the blood vessels and walls of heart of the human body.…

Q: WHich are the different types of mechanoreceptors in the skin?

A: Skin or the integument is one of the sensory receptor of the body. Skin is supplied with a lots of…

Q: What are the specific functions of the middle ear?

A: Inner to the tympanic membrane, within temporal bone of human skull middle ear is located. The three…

Q: What happens if the ciliary muscle in the eye is contracted?

A: If the ciliary muscle in the contracted lens become more spherical and has increased focussing power…

Q: What is Preeclampsia?

A: In the female reproductive system, the menstrual cycle is the regular natural change that occurs…

Q: What is labyrinth?

A: The ear is called the organ of hearing and balance. It comprises three anatomical parts, namely,…

Q: What is the function of Gustation?

A: Gustation is basically a sensory perception of the taste.  The tongue is the sensory organ which…

Q: Which nervous system is responsible for dilation of pupil?

A: The nervous system controls and coordinates all the activities in the body. It is majorly classified…

Q: What is Speech Reading?

A: Answer - Sрeeсh  reаding,  аlsо  саlled  liрreаding,  is  'reаding'  the  visuаl  сlues  оf  а…

Q: What is the influence of sensory unit size and density on acuity?

A: Two-point discrimination is the ability to distinguish between two points touching the skin. Hence,…

Q: What type of organ is Redula?

A: The Kingdom Animalia is a diverse group. It has animals ranging from simple sponges to complex…

Q: What is the difference between The Middle and Inner Ear?

A: There are sensory organs involved in the perception of various senses like vision, smell, sound,…

Q: Which part of the ear determines the pitch of a sound?

A: The sensory organs are receptors, which are responsible to detect all the types of changes in the…

Q: What is taste buds?

A: There are two types of cells that make up the bud: supporting cells and gustatory cells. The…

Q: What is a blind spot of the eye?

A: When the light reaches to our retina, it sends electrical bursts with the help of the optic nerve to…

Q: What is sclera?

A: Organs such as the eyes make up the visual system. They give living organisms vision, the ability to…

Q: What are the organs of Hearing ?

A: Hearing, or auditory perception can be defined as the ability to perceive the sounds by detecting…

Q: What is area postrema?

A: The area postrema is a highly vascular paired structure in the medulla oblongata in the brainstem.

Q: What is the auditory cortex?

A: The sensory system is a part of the sensory system liable for handling sensory data. A sensory…

Q: What is the dark adaptation?

A: Eyes are the sense organs associated with the sense of vision.

Q: When the eyes are open, what sensory organs provide information needed to maintain equilibrium?

A: Eyes are the organ involved in vision. These detect light and changes it into electrochemical…

Q: which window allows sound to enter the inner ear; the round window or the oval window?

A: Round window allows sound to enter in the middle ear.

Q: Which one of the five categories of sensory receptorsis primarily dedicated to external stimuli?

A: Sensory receptors are mainly present in organs like internal organs, mouth, nose ears, and eyes. The…

Q: What initates the reflex movement of the head toward an auditory stimulus (such as a loud noise)?

A: The brainstem (posterior part of the brain) links the prosencephalon and cerebellum to the spinal…

Q: How do you hear a sound?

A: The ear is the organ of hearing. The ear is an advanced and very sensitive organ of the human body.…

Anatomy and Physiology of Special Sensory Organs

Sensory organs can be labeled as special sensory structures that permit sight, hearing, odor, and flavor. Sensory structures permitting proprioception, touch, thermal, and pain perception can be classified as more advanced sensory organs. The sensory neurons are trained to find out modifications in the external and internal conditions so that a person's body can react to that change. A stimulus is the first signal that is recognized by any sensory receptor of the body. Stimulus is an impulse generated when there is a change in the surroundings of a person. For example, a heated environment will alert the brain through the thermal sensory organs and generate a reflex accordingly.

Sensory Receptors

The human sensory system is one of the most complex and highly evolved structures, which processes a myriad of incoming messages. This well-coordinated system helps an organism or individual to respond to external stimuli, appropriately. The sensory receptors are an important part of the sensory system. These receptors are specialized epidermal cells that respond to external environmental stimuli. These receptors consist of structural and support cells that form the peripheral unit of the receptor and the neural dendrites which receive and detect the external stimuli.