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⁺⁺

Which part of the human brain is concerned with the regulation of body temperature?

(a)

Cerebellum

(b)

Cerebrum

(c)

Medulla oblongata

(d)

Hypothalamus

The abundant intracellular cation is _____.

(a)

H⁺

(b)

K⁺

(c)

Na⁺

(d)

Ca⁺⁺

All of the following are associated with the myeline sheath except.

(a)

Faster conduction of nerve impulses

(b)

Nodes of Ranvier forming gaps along the axon

(c)

Increased energy output for nerve impulse conduction

(d)

Saltatory conduction of action potential

Choose the wrong statement with regard to a dendron.

(a)

Dendrons are branched.

(b)

Dendron gives rise to Axon.

(c)

Dendron is associated with myelin sheath

(d)

Dendron arises from cell body.

________ contains vital centres that control cardio vascular reflexes and respiration.

(a)

Cerebrum

(b)

Pons

(c)

Medulla

(d)

Cerebellum

Foramen of Munro corresponds to _____________ Ventricle.

(a)

First

(b)

Third

(c)

Second

(d)

Fourth

Why is the blind spot called so?

The action potential occurs in response to a threshold stimulus; but not at subthreshold stimuli. What is the name of the principle involved?

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

What is a Synapse?

What is cauda equina? horse tail?

What is 'accommodation' of the human eye

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.

Differentiate Rods and cones.

Name the chambers of the cochlea.

Describe the structures of olfactory receptors.