1. First carpal bone to appear is?
a) Trapezium
b) Capitate
c) Pisiform
d) Lunate
Correct Answer - B
Ans. is 'B' i.e., Capitate [Ref Reddy's Essentials 26th/e p. 63]
The ossification centres in carpal bones appear as follows :
n Capitate 1 year n Hamate 2 years
n Triquitrum 3 years n Lunate 4 years
n Scaphoid and trapezoid 5 years n Trapezium6 years
n Pisiform 11 years
,2. Pharyngeal muscles are derived from
which pharyngeal arch ?
a) 1st
b) 2nd
c) 3rd
d) 5th
Correct Answer - C
3rd
,3. Spinal cord develops from ?
a) Neural tube
b) Mesencephalon
c) Rhombencephalon
d) Prosencephalon
Correct Answer - A
Ans. is 'a' i.e., Neural tube
Nervous system develops from ectoderm (neuroectoderm). Nervous
system develops from neural tube which in turn develops by process
of neurulation, i.e. formation of neural plate and its infolding into
neural tube. Structures formed from neural tube are :?
1. From cranial part (enlarged cephalic part)
Gives rise to brain. Developmental parts are :
Forebrain (prosencephalon)
Telencephalon : Cerebral hemisphere and lateral ventricle.
Diencephalon : Optic cup and stalk (gives rise to retina), pituitary,
thalamus, hypothalamus, epithalamus, pineal gland, and third
ventricle.
Midbrain (mesencephalon)
Cerebral aqueduct.
Hindbrain (rhombencephalon)
Metencephalon : Cerebellum, pons
Myelencephalon : Medulla oblongata
2. From caudal part
Gives rise to spinal cord.
, 4.
a) Trapezium
b) Capitate
c) Pisiform
d) Lunate
Correct Answer - B
Ans. is 'B' i.e., Capitate [Ref Reddy's Essentials 26th/e p. 63]
The ossification centres in carpal bones appear as follows :
n Capitate 1 year n Hamate 2 years
n Triquitrum 3 years n Lunate 4 years
n Scaphoid and trapezoid 5 years n Trapezium6 years
n Pisiform 11 years
,2. Pharyngeal muscles are derived from
which pharyngeal arch ?
a) 1st
b) 2nd
c) 3rd
d) 5th
Correct Answer - C
3rd
,3. Spinal cord develops from ?
a) Neural tube
b) Mesencephalon
c) Rhombencephalon
d) Prosencephalon
Correct Answer - A
Ans. is 'a' i.e., Neural tube
Nervous system develops from ectoderm (neuroectoderm). Nervous
system develops from neural tube which in turn develops by process
of neurulation, i.e. formation of neural plate and its infolding into
neural tube. Structures formed from neural tube are :?
1. From cranial part (enlarged cephalic part)
Gives rise to brain. Developmental parts are :
Forebrain (prosencephalon)
Telencephalon : Cerebral hemisphere and lateral ventricle.
Diencephalon : Optic cup and stalk (gives rise to retina), pituitary,
thalamus, hypothalamus, epithalamus, pineal gland, and third
ventricle.
Midbrain (mesencephalon)
Cerebral aqueduct.
Hindbrain (rhombencephalon)
Metencephalon : Cerebellum, pons
Myelencephalon : Medulla oblongata
2. From caudal part
Gives rise to spinal cord.
, 4.
