Physiology Quiz Question & Answers

Physiology Quiz Question & Answers (Question Bank) Free Online Test For Medical Students like PG, PHD, Specialist exam entrance.

 Physiology  is the scientific study of the normal function in living systems.

We have put total 50 Objective Type Question Answers on Physiology, you can practice these question answers for free. Well you can also check list of Online Medical Entrance Mock Test / Quiz question comes from different areas on Medical.

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Physiology Quiz Question & Answers (Total 50 MCQs)

Physiology Online Mock Test (high Level)

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Question 1
Lesion in ventromedial hypothalamus typically result in :
A
Anorexia
B
Obesity
C
Hypersexuality
D
Amnesia
Question 2
Destruction of pneumotaxic centre in pons causes :
A
Apnoea
B
Forceful respiration
C
Apneustic respiration
D
Accelerated respiration
Question 3
Principle organelle involved in the execution of apoptosis is ?
A
Nucleus
B
Lysosome
C
Mitochondria
D
Mitochondria
Question 4
In healthy individual sudden decrease of plasma proteins upto 4-5 gm% produces :
A
Protein Shock
B
No ill-effects on the body
C
Exhaustion of protein reserves
D
Generalized oedema
Question 5
Voltage gated Sodium channels are most concentrated in :
A
Dendrites
B
Cell body near dendrites
C
Axon tip
D
Initial segment of axon
Question 6
All of the following are glycoprotein hormones except :
A
FSH
B
TRH
C
LH
D
hCG
Question 7
Which of the following neurotransmitter has both excitatory and inhibitory effects ?
A
Glycine
B
GABA
C
Aspartate
D
Glutamate
Question 8
In health, physiological dead space is :
A
Double than that of anatomical dead space
B
Less than that of anatomical dead space
C
Triple than that of anatomical dead space
D
Equal to anatomical dead space
Question 9
When a person is dehydrated hypotonic fluid will be found in the    
A
Ascending thick segment of loop of Henle
B
Proximal tubule
C
Glomerular filtrate
D
Medullary duct
Question 10
Secretion of conjugated bilirubin by hepatic cells into bile canaliculi is
A
An active process
B
a passive process
C
exocytosis
D
diffusion
Question 11
According to Bernoulli's principle :
A
When blood flows through a narrowed section of vessel, kinetic energy decreases
B
Sum of the kinetic energy of flow and pressure energy is always constant in a blood vessel
C
At high velocity of blood flow, pressure energy increases and kinetic energy is reduced
D
Kinetic energy of flow increases as the blood flow increases
Question 12
Which of the following receptors are directly involved in long term potentiation ?
A
Cholinergic
B
P2
C
NMDA
D
GABA
Question 13
Which of the following ions is found in the highest concentration in saliva :
A
Na+
B
K+
C
Cl-
D
HCO3-
Question 14
Which of the following is not a characteristic feature of anaemic hypoxia :
A
Produces severe hypoxia during exercise
B
Associated with increased amount of 2,3 DPG in the RBC
C
Normal arterial O2 content
D
Normal arterial pO2
Question 15
Principal oestrogen secreted by fetoplacental unit is :    
A
Oestradiol
B
Oestriol
C
Oestrone
D
Ethinyl Oestradiol
Question 16
Which of the following vessels do not contain deoxygenated blood ?
A
Pulmonary artery
B
Umbilical artery
C
Umbilical vein
D
Renal vein
Question 17
Which of the following reflexes is always absent in the blind ?
A
Vestibulo ocular reflex
B
Nystagmus
C
Visual accommodation
D
Cilio spinal reflex
Question 18
Axons of ganglion cells in the retina terminate in the
A
Pretectal nucleus
B
Superior colliculus
C
Lateral geniculate body
D
Suprachiasmatic nucleus
Question 19
Which of the following is a rapidly adapting sensory receptors ?
A
Muscle spindle
B
Pain receptor
C
Pacinian corpuscle
D
Golgi tendon receptor
Question 20
Discrete partial depolarization in smooth muscles similar to end plate potential is called :
A
Spike potential
B
Excitatory junctional potential
C
Miniature end plate potential
D
Threshold potential
Question 21
The effect of ADH on the kidney is to
A
Increase the permeability of the distal nephron to water.
B
Increase the excretion of water.
C
Increase the excretion of sodium
D
Increase the diameter of the renal artery.
Question 22
Failure to absorb bile salts in the distal ileum causes :
A
Constipation
B
Watery diarrhea
C
Dysentery
D
No effect
Question 23
Saccadic eye movements are programmed in
A
Frontal cortex & superior colliculus
B
Frontal cortex & Pretectal nucleus
C
Superior colliculus & Pretectal nucleus
D
Medial longitudinal fasciculus
Question 24
Which of the following does not occur in high altitude acclimatization :
A
Reticulocytosis
B
Increased serum erythropoietin
C
Increased serum cortisol
D
Increased blood glucose
Question 25
Depolarization of inner hair cells in the Organ of Corti occurs by :      
A
K+influx
B
Na+influx
C
Ca++influx
D
Cl- efflux
Question 26
In Hemoglobin S, at sixth position in beta chain
A
glutamic acid is replaced by glycine
B
glutamic acid is replaced by valine
C
valine is replaced by glutamic acid
D
Valine is replaced by glycine.
Question 27
Part of the nephron highly permeable to water is :
A
PCT
B
Loop of henle
C
DCT
D
Collecting tubule
Question 28
Which class of antibody is produced during primary immune response ?
A
IgG
B
IgM
C
IgE
D
IgD
Question 29
The following are the characteristics of a substance for measuring GFR except :
A
Freely filtered
B
Stored in kidney
C
Not reabsorbed or excreted by tubules
D
Not protein bound
Question 30
The functions of tropomyosin in skeletal muscle include :  
A
Sliding on actin to produce shortening
B
Releasing Ca++after initiation of contraction
C
Binding to myosin during contraction
D
Acting as 'relaxing protein' at rest by covering up the sites where myosin binds to actin
Question 31
Which of the following has slowest conduction velocity ?
A
A α fibers
B
A β fibers
C
B fibers
D
C fibers
Question 32
Which of the following pituitary hormone is an opiod peptide ?
A
Growth hormone
B
α MSH
C
β MSH
D
TSH
Question 33
A low frequency, high amplitude, synchronized cortical rhythm occurs during :
A
Stage 1 &2 slow waves sleep
B
Stage 3 & 4 slow waves sleep
C
REM sleep
D
Narcolepsy
Question 34
Representational hemisphere is chiefly concerned with :
A
Language
B
Recognition of faces
C
Stereognosis
D
Spatial temporal relation
Question 35
Contraction of which of the following muscles is most important for causing forceful expiration ?
A
Diaphragm
B
External intercostals
C
Sternocleidomastoids
D
Abdominals
Question 36
The RBCs of blood group O are agglutinated by
A
neither α nor β
B
agglutinin α 
C
agglutinin β 
D
both α and β
Question 37
Hyperpolarization of receptor cells activates which sensory modality ?    
A
Vision
B
Audition
C
Olfaction
D
Gustation
Question 38
Ejection fraction of the ventricle refers to the ratio of :
A
Amount of blood received / amount of blood ejected
B
Stroke volume / end diastolic volume
C
End systolic volume / end diastolic volume
D
Stroke volume / end systolic volume
Question 39
Which of the following vessels carry maximum amount of blood at any given time ?    
A
Aorta
B
Capillary bed
C
Veins
D
Pulmonary artery
Question 40
All of the following are neurotrophins except :
A
Nerve Growth factor
B
Brain derived neurotrophic factor
C
Neurotrophin
D
Neuropeptide-Y
Question 41
Transcription is :
A
The process where an mRNA is used as template for protein production
B
The process where a DNA sequence is copied into RNA for the purpose of gene expression
C
The process where DNA wraps around histones to form a nucleosome
D
The process of replication of DNA prior to cell division
Question 42
The amount of oxygen carried in dissolved form is :
A
0.03 ml/100ml/100 mm Hg
B
3 ml/100ml/100 mm Hg
C
30 ml/100ml/100 mm Hg
D
0.3 ml/100ml/100 mm Hg
Question 43
The rhythmic contraction in GIT is highest in :
A
Stomach
B
Duodenum
C
Ileum
D
Colon
Question 44
Which of the following is not the oxidizing agent for killing bacteria within neutrophils ?
A
Superoxide dismutase
B
Myeloperoxidase
C
Peroxidase
D
Glutathione reductase
Question 45
Increased peripheral vascular resistance is caused by :
A
Discharge of sympathetic cholinergic fibers
B
Histamine
C
Lactic acid
D
Angiotensin II
Question 46
Sudden death may occur in an individual following a massive heart attack due to activation of :
A
Bainbridge reflex
B
Cushing reflex
C
Bezold Jarisch reflex
D
Hering-Breurer reflex
Question 47
Which is the most abundant adrenocortical hormone in human beings ?
A
Aldosterone
B
Cortisol
C
DHEA sulphate
D
Corticosterone
Question 48
Pancreatic juice rich in water and electrolytes but poor in enzymes is secreted in response to :
A
Pancreaozymin
B
Cholecystokinin
C
Secretin
D
Gastrin
Question 49
Which of the following is most predominant effect by incretin ?
A
Vasoactive intestinal polypeptide
B
Pancreatic polypeptide
C
Glucagon like polypeptide
D
Somatostatin
Question 50
Haematocrit of venous blood is :
A
3 times greater than that of arterial blood.
B
3% greater than that of arterial blood
C
3% less than that of arterial blood.
D
3 times less than that of arterial blood.
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