Q9.Ovulation is primarily caused by preovulatory surge of :
A.
Estradiol.
B.
Luteinizing hormone.
C.
Progesterone.
D.
Follicle stimulating hormone.
Ans: B. Luteinizing
hormone.
Q10.Most afferent fibers from the lateral geniculate nucleus
terminate in the primary visual cortex in :
A.
Layer 1.
B.
Layer 2 & 3.
C.
Layer 4.
D.
Layer 5 & 6.
Ans: C. Layer 4.
Q11.The blobs of the visual cortex are associated with :
A.
Ocular dominance.
B.
Orientation.
C.
Color processing.
D.
Saccadic eye movements.
Ans: C. Color
processing.
Q12.The parvocellular pathway, from the lateral geniculate
nucleus to the visual cortex, carries signals for the detection of :
A.
Movement, depth and flicker.
B.
Color vision, shape and fine details.
C.
Temporal frequency.
D.
Luminance contrast.
Ans: B. Color vision,
shape and fine details.
Q13.A pilot in Sukhoi aircraft is experiencing negative
G. Which of the following physiological
events will manifest in such situation?
A.
The hydrostatic pressure in veins of lower limb
increases.
B.
The cardiac output decreases.
C.
Black out occurs.
D.
The cerebral arterial pressure rises.
Ans: D. The cerebral
arterial pressure rises.
Q14.In human being, the least useful physiological response to
low environmental temperature is :
A.
Shivering.
B.
Vasoconstriction.
C.
Release of thyroxine.
D.
Piloerection.
Ans: D. Piloerection.
Q15.The cell bodies of or exinergic neurons are present in:
A.
Locus coeruleus.
B.
Dorsal raphe.
C.
Lateral hypothalamic area.
D.
Hippocampus.
Ans: C. Lateral
hypothalamic area.
Q16.The tubuloglomerular feedback is mediated by:
A.
Sensing of Na+ concentration in the macula
densa.
B.
Sensing of Cl+ concentration in macula densa.
C.
Sensing NaCl concentration in the macula densa.
D.
Opening up of voltage gated Na+ channels in
afferent arteriole.
Ans: C. Sensing NaCl
concentration in the macula densa.
Q17.The prime driving force for counter current multiplier
system is :
A.
Medullary hperosmolarity.
B.
Reabsorption of Na+ in thick ascending limb.
C.
Action of ADH via aquaporin channels.
D.
Urea recycling.
Ans: B. Reabsorption of
Na+ in thick ascending limb.
Q18.Which of the following organs is not involved in calcium
homeostasis?
A.
Kidneys.
B.
Skin.
C.
Intestines.
D. Lungs.
Ans: D. Lungs.
Q19.Testosterone production is mainly contributed by:
A.
Leydig cells.
B.
Sertolie cells.
C.
Seminiferous tubules.
D. Epididymis.
Ans: A. Leydig cells.
Q20.Which of the following secretions has a very high pH?
A.
Gastric juice.
B.
Pancreatic juice.
C.
Bile in gall bladder.
D. Saliva.
Ans: B. Pancreatic
juice.
Q21.The maintenance of posture in a normal adult human being
depends upon:
A.
Integrity of reflex arc.
B.
Muscle power.
C.
Type of muscle fibres.
D. Joint
movements in physiological range.
Ans: A. Integrity of
reflex arc.
Q22.The first reflex response to appear as spinal shock wears
off in humans is :
A.
Tympanic reflex.
B.
Withdrawal reflex.
C.
Neck righting reflex.
D. Labyrinthine
reflex.
Ans: B. Withdrawal
reflex.
Q23.The hyperkinetic features of the Huntington’s disease are
due to the loss of :
A.
Nigrostriatal dopaminergic system.
B.
Intrastriatal cholinergic system.
C.
GABA-ergic and choloinergic system.
D. Intrastriatal
GABA-ergic and cholinergic system.
Ans: D. Intrastriatal
GABA-ergic and cholinergic system.
Q24.Pavlov’s experiment is an example of:
A.
Operant conditioning.
B.
Classical conditioning.
C.
Learned helplessness.
D. Modelling.
Ans: B. Classical
conditioning.
Q25.The normal range of serum osmolality (in mOsm/L) is:
A.
270 to 285.
B.
300 to 320.
C.
350 to 375.
D. 200
to 250.
Ans: A. 270 to 285.
