Class 11 Biology - Chapter Neural Control and Coordination NCERT Solutions | Explain the structure of middle and inte
Explain the structure of middle and internal ear with the help of diagram.
Structure of middle ear: The middle ear contains three bony ossicles which are arranged in a chain called malleus, incus and stapes and the tympanic membrane. Tympanic membrane separates middle ear from external ear. Middle ear is connected to nasopharynx by Eustachian tube. This membrane is also known as ear drum. It catches the sound waves to and transfers to bony ossicles pick these waves and transmit to the inner ear.
Structure of inner ear: The inner ear consists a complex system called vestibular apparatus located above the cochlea. Inner ear is a fluid filled chamber known as labyrinth. It is composed of outer bony labyrinth and inner membrane labyrinth. Labyrinth is also divided into cochlea and semi- circular canals. Each semi- circular canal lies in a different plane at right angles to each other. The base of the canals is swollen is called ampulla. An oval window in the cochlea receives sound waves from the stapes and sends auditory signals to the brain. Posture of the body is maintained by semi- circular canals.
More Questions From Class 11 Biology - Chapter Neural Control and Coordination
- Q:- Explain the following processes:
(a) Polarisation of the membrane of a nerve fibre
(b) Depolarisation of the membrane of a nerve fibre
(c) Conduction of a nerve impulse along a nerve fibre
(d) Transmission of a nerve impulse across a chemical synapse - Q:-
Briefly describe the structure of the following:
(a) Brain
(b) Eye
(c) Ear - Q:- Explain the following:
(a) Role of Na+ in the generation of action potential.
(b) Mechanism of generation of light-induced impulse in the retina.
(c) Mechanism through which a sound produces a nerve impulse in the inner ear. - Q:- Write short notes on the following:
(a) Neural coordination
(b) Forebrain
(c) Midbrain
(d) Hindbrain
(e) Retina
(f) Ear ossicles
(g) Cochlea
(h) Organ of Corti
(i) Synapse - Q:- Give a brief account of:
(a) Mechanism of synaptic transmission
(b) Mechanism of vision
(c) Mechanism of hearing - Q:- Differentiate between:
(a) Myelinated and non-myelinated axons
(b) Dendrites and axons
(c) Rods and cones
(d) Thalamus and Hypothalamus
(e) Cerebrum and Cerebellum - Q:- Answer the following:
(a) Which part of the ear determines the pitch of a sound?
(b) Which part of the human brain is the most developed?
(c) Which part of our central neural system acts as a master clock? - Q:- Distinguish between:
(a) afferent neurons and efferent neurons
(b) impulse conduction in a myelinated nerve fibre and unmyelinated nerve fibre
(c) aqueous humor and vitreous humor
(d) blind spot and yellow spot
(f) cranial nerves and spinal nerves. - Q:- Answer briefly:
(a) How do you perceive the colour of an object?
(b) Which part of our body helps us in maintaining the body balance?
(c) How does the eye regulate the amount of light that falls on the retina? - Q:- Compare the following:
(a) Central neural system (CNS) and Peripheral neural system (PNS)
(b) Resting potential and action potential
(c) Choroid and retina
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