Biology important mcqs from circulatory system

IMPORTANT mcqs from circulatory system for MDCAT preparation
1)heart is present in a thoracic cavity called
A)pericardium
B)mediastinum
C)endo cardium

2)apex of heart is formed by
A)left atria
B)left ventricals
C)right ventricals
D)valves

3)inferior border of heart is formed by
A)right ventrical
B)left ventrical
C)both
D)both atria

4)right ventrical has how many surfaces
A)2
B)3
C)4
D)5

5)inneemost layer of heart is called
A)myocardium
B)endocardium
C)epicardium

6)inner layer of artries is called
A)tunica initima
B)tunica media
C)tunica adventitia

7)middle layer of artries has muscles
A)smooth
B)circular
C)longitudinal

8)cappilaries has diameter
A)7 to 9 um
B)9 to 11 um
C)12 um
D)1 um

9)blood from cappilaries comes in
A)artries
B)veins
C)venules

10)veins with valves are present in
A)thoracuc region
B)limbs
C)abdomin
D)all

11)the common function of lymphocytes is
A)formation of components of complement system
B)formation of antibidies
C)antitumor cavity
D)all

12)during first trimestee of pregnnone
 RBCS are produced from
A)liver
B)yolk sac
C)bone marrow
D)lymph nodes
.13)true about antibidies
A)protein and carbohydrate in natute
B)circulate as bound immunoglobins
C)are formed as expoure to antigens in eay life of fetal
D)none

14)cell mediated immunity involve
A)t lymphocytes
B)complement
C)b lymohocytes

15)do not form red blood cells
A)femur
B)tibia
C)fibula
D)none

16)immunity against snake bite is
A)active natural
b)passive natural
C)passive artifcal
D)all

17)pus cells has
a)dead neutrophils
B)dead macrophages
c)necrotic tissues
D)all

18)whe ventricals depolarize cause
A)T wave
B)p wave
C)QRS Wave
d)none

19)which of the cardic muscles has highest conducting velocity
A)SA node
B)atrial node
c)purkinjie muscles
d)Av nodes

20)anemia is
A)excess of blood
b)deficiency of blood
C)normality
D)none

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