Which of the following is true for the function of labelled parts in the diagram below?

(1) A - Blind spot  -   Image is formed here 

(2) B - Fovea       - No visual activity is present

(3) C - Cornea      - Helps to hold lens in place

(4) D - Iris          - Visible coloured portion of eye

Given is the diagrammatic representation of the sectional view of cochlea. Select the correct option regarding it.

(a) A - Organ of corti-responsible for maintenance of balance of the body and posture.
(b) B - Scala vestibuli-filled with endolymph that ends at the round window.
(c) C - Scala tympani- terminates at the round window which opens to the middle ear.
(d) D - Basilar membrane nerve impulses are generated against it.

A small rise in the body temperature of humans is corrected by

(i) sweating
(ii) dilating the skin arteries
(iii) constricting the skin arteries
(iv) increased tension of muscles in the skin.

(1) (i) only

(2) (ii) only

(3) (i) and (ii)

(4) (iii) and (iv)

Pacinian corpuscles occur in the skin of certain parts of body in mammals. These are

(1) type of glands

(2) pain receptors

(3) naked tactile receptors

(4) encapsulated pressure receptors.

The cavity of diencephalon is known as 
(1) first ventricle

(2) second ventricle

(3) third ventricle

(4) fourth ventricle

Which one is an incorrect match?
(1) Glucoma-Abnormal high pressure on liquid of eye

(2) Eustachian tube-Connects middle ear cavity with pharynx

(3) Caloreceptor-Heat

(4) Interoreceptor-Touch

The cranial nerves which originate from the medulla oblongata are
(1) IX, X, XI and XII

(2) III, VIl and IX

(3) VII, VII IX and X

(4) VIlI, IX, X, XI and XII

Node of Ranvier occurs where
(1) nerve is covered with myelin sheath

(2) neurolemma is discontinuous

(3) neurolemma and myelin sheath are discontinuous

(4) myelin sheath is discontinuous

In the homeostatic control of blood sugar level, which organs function as modulator and effector respectively?

(1) Liver and islet of Langerhans

(2) Hypothalamus and liver

(3) Hypothalamus and islet of Langerhans

(4) Islet of Langerhans and hypothalamus

The brain disease caused due to accumulation of amyloid $\mathrm{\beta }$-peptide is 
(1) Addison's disease

(2) Huntington's disease

(3) Parkinson's disease

(4) Alzheimer's disease