The impulses of sound wave are transmitted by …. In the auditory cortex of the brain.

(1) Afferent Fibres via auditory nerves

(2) Efferent Fibres via auditory nerves

(3) Association fibres via auditory nerve

(4) Both A and C

In the resting stage, the axonal membrane:
1. is more permeable to sodium than to potassium ions
2. is more permeable to potassium than to sodium ions
3. equally permeable to both sodium and potassium ions
4. impermeable to both sodium and potassium ions

Sympathetic stimulation would lead to all of the following except:
1. Dilation of pupil
2. Bronchoconstriction
3. Increased heart rate
4. Decreased gland secretions

Which region of the diencephalon controls the ANS and endocrine system and body temperature?
1. epithalamus

2. hypothalamus

3. thalamus

4. infundibulum

The autonomic division of the peripheral nervous system does not innervate:
1. visceral organs
2. exocrine glands
3. skeletal muscle
4. endocrine glands

Four healthy people in their twenties got involved in injuries resulting in damage and death of a few cell of the following. Which of the cells are least likely to be replaced by new cells -

1. Osteocytes

2. Liver cells

3. Neurons

4. Malpighian layer of the skin

One of the examples of the action of the autonomous nervous system is -

1. Knee-jerk reponse

2. Pupillary reflex

3. Peristalsis of the intestines

4. Swallowing of food

Parkinson's disease (characterized by tremors and progressive rigidity of limbs) is caused by degeneration of brain neurons that are involved in movement control and make use of neurotransmitter -

1. Norepinephrine

2. Acetylcholine

3. GABA

4. Dopamine

The number of correct statements amongst the given statements is:

I. Somatic neural system relays impulses from the CNS to smooth muscles of the body.

II. Myelinated nerve fibers are found in spinal nerves but nor in cranial nerves.

III. Sodium-potassium pump transports 3 sodium outwards and 2 potassium into the cell.

IV. Electrical synapses are rare in our system.

V. Efferent neurons carry signals from the CNS to the effector.

   1.  2         

   2.  3

   3.  4         

   4.  5

In the given diagram of the human skull, the bones represented by the letters A, B and C are respectively

          1. Sphenoid, Ethmoid and Lacrimal

          2. Ethmoid, Sphenoid and Lacrimal

          3. Sphenoid, Lacrimal and Ethmoid

          4. Ethmoid, Lacrimal and Sphenoid