Anatomy of the Ears | location and function

Ear

The organs of hearing and equilibrium convert mechanical energy to receptor (action) potential. Therefore, they are called mechanoreceptors. “The mechanoreceptors contain hair cells that generate receptor potential when the hair are bent by moving fluid or by particles.  The study of structure, function and diseases of the ear is called otology (G. ous = ear, logos … Read more

Organ of Corti in ear | Crack your Target

Organ of Corti diagram

Organ of Corti Definition The basilar membrane bears on it an organ of hearing called the organ of Corti .   The latter consists of receptor cells (phonoreceptors) and supporting cells. The receptor cells, also called hair cells, bear hair (modified microvilli) at the free surface and have synaptic contacts with the dendrites of neurons at the … Read more

Structure of Eye

Eye

The organs of sight are a pair of eyes. The study of structure, functions and diseases of the eye is called ophthalmology. (G. ophthalmos = eye. logos = discourse).  • Location  The eyes are situated in deep protective bony cavities, called the orbits, or eye sockets, of the skull. Between the eye and the bony wall of … Read more

What is a Sensory system?– An overview and important solved questions

What is a Sensory system ? The sensory system is a part of the nervous system responsible for processing sensory information. A sensory system consists of sensory receptors, neural pathways, and parts of the brain involved in sensory perception. What are the Sense organ of the body ? Commonly recognized sense organ are those for seeing, hearing, smell, taste and touching or feeling. In short, senses are transducers from the physical … Read more

Reflex action | Definition, Types and Mechanism and Important solved questions

  Reflex Action Definition A reflex action may be defined as a spontaneous, automatic and mechanical response to a stimulus acting on a specific receptor without the will of an animal.  Reflex action meaning Reflex means Rapid, involuntary Motor Response to Stimulus Reflex actions means something that you do without thinking, as a reaction to a situation. … Read more

Central Nervous System – An Overview and Important Solved questions for all exams

What is the Central Nervous System ? The central nervous system(cns) includes the brain and spinal cord. The brain and spinal cord are protected by bony structure, membranes and fluid . The brain is held in the cranial cavity of the skull and and it’s consists of the cerebrum,cerebellum and the brain stem. The nerves … Read more

Nervous system in humans | facts, structure and 3 main function

Nervous system The nervous system of all animals is composed of highly specialised cells called neurons which can detect , receive and transmit different kinds of stimuli . The nervous system organization is very simple in invertebrates . For example, in Hydra it is composed of a network of neurons. The nervous  system is better … Read more