Which structure in the ear converts pressure waves to action potentials?

(a)

Tympanic membrane

(b)

Organ of Corti

(c)

Oval window

(d)

Semicircular canal

During synaptic transmission of nerve impulse, neurotransmitter (P) is released from synaptic vesicles by the action of ions (Q). Choose the correct P and Q.

(a)

P = Acetylcholine, Q = Ca⁺⁺

(b)

P = Acetylcholine, Q =Na⁺

(c)

P = GABA, Q = Na⁺

(d)

P = Cholinesterase, Q = Ca⁺⁺

Assertion(A): The imbalance in concentration of Na⁺, K⁺ and proteins generates action potential.
Reason(R): To maintain the unequal distribution of Na⁺ and K⁺, the neurons use electrical energy.

(a)

Both Assertion and Reason are true and Reason is the correct explanation of the Assertion.

(b)

Both Assertion and Reason are true but the Reason is not the correct explanations of Assertion.

(c)

Assertion is true, but Reason is false.

(d)

Both Assertion and Reason are false

Which of the following statement concerning the somatic division of the peripheral neural system is incorrect?

(a)

Its pathways innervate skeletal muscles

(b)

Its pathways are usually voluntary

(c)

Some of its pathways are referred to as reflex arcs

(d)

Its pathways always involve four neurons

Why is the blind spot called so?

Cornea transplant in humans is almost never rejected. State the reason.

Sam's optometrist tells him that his intraocular pressure is high. What is this condition called and which fluid does it involve?

Label the parts of the neuron.

What is ANS? Explain the components of ANS.

Name the first five cranial nerves, their nature and their functions.

Describe the structures of olfactory receptors.