1
NEET 2018
MCQ (Single Correct Answer)
+4
-1
The transparent lens in the human eye is held in its place by
A
smooth muscles attached to the ciliary body.
B
ligaments attached to the ciliary body
C
ligaments attached to the iris
D
smooth muscles attached to the iris
2
NEET 2017
MCQ (Single Correct Answer)
+4
-1
Receptor sites for neurotransmitters are present on
A
pre-synaptic membrane
B
tips of axons
C
post-synaptic membrane
D
membranees of synaptic vesicles.
3
NEET 2017
MCQ (Single Correct Answer)
+4
-1
Myelin sheath is produced by
A
astrocytes and Schwann cell
B
oligodendrocytes and osteoclasts
C
osteoclasts and astrocytes
D
Schwann cells and oligodendrocytes.
4
NEET 2017
MCQ (Single Correct Answer)
+4
-1
Good vishion depends on adequate intake of carotene rich food.

Select the best option from the following statements.
(1)  Vitamins A derivatives are formed from carotene,
(2)  The photopigments are embedded in the membrane discs of the inner segment.
(3)  Retinal is a derivative of vitamin A.
(4)  Retinal is a light absorbing part of all the visual photopigments.
A
(1), (3) and (4)
B
(1) and (3)
C
(2), (3) and (4)
D
(1) and (2)
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