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1) all of the following statements are true for the myosin head except :
a-it has an actin binding site
b-it has ATP binding site
c-it has ATPase activity
d- it has a Ca+2 binding site
2) end-plate potential :
graded
3) Extracelluar fluid can be measured by:
a-Radio active iodine
b-Even’s blue dye
c-inulin
d-deuterium oxida(heavy water)
e- creatinine
4) facilitated diffusion:
a-does not need carrier protein
b-passive transport
5)Na+_K+ pump:
a-coupled with ATP
b-downhill its electrochemical gradient
c- pump 3 K
6) A normal individual with total body water of 42 L have intersitial fluid is about :
a-5L
b-15L
c-3.5L
d-11.5L
e-25L
7)comparing ECF, ICF have more
a-protein concentration
b-Na+ conc.
c-Cl- conc.
d-ca+ conc.
e- osmolarity
8)erythropoietin:
a- is glycoprotein
b-induce formation of blood cell in bone marrow
c-level is low in people living at high altitude
d-is secreted mainly by the live
9)activation of prothrombin to thrombin:
a-require active clotting factor X,V , Ca+ , phispholipid
b-is unnecessary in the extrinisc pathway of blood coagulation
c-increase in the absence of Ca+
d-occure in platelet plug
10) erythropoiesis:
a-it start with myeloblast
b-decrease at high altitude
c-is stimulated by reduction in arterial oxygen content
d-it doesnt affected with removal 2 kidneys
e-it’s formed in embryo at early few week of pregnancy in bone marrow
11) monocyte :
is the precursors of tissue macrophages
12) which of the following is no granular:
a-neutrophil
b-eosinophil
c-basophil
d-lymphocyte
e-non of the above
13) O-ve has
a- antigens Aand B
b- antibodies to A and B antigen
14) deficiency of Iron lead to
microcytic hypochromic anemia
15)all of the following correct neutophils except:
a-it does phagocytosis
b-produce antibodies
16) plasma cell
a-produce immunoglobulins(antibodies)
b-T lymphocyte
17) immune response in humoral
immediate production of high titer(amount)antibodies for the second time
18)second baby has a Rh +ve ,from a mother which has Rh -ve ,will be in riskmore than the first baby
19)eosinophil
a-secrete heparin
b-have high count in parasitic disease
c-it is not a phagocytosis
d-produce antibodies
19) coagulation
a-plasmin digests fibrin clot
b- increase
20) nerve action potential:
21) drugs
neostigmine is anticholinestrase
22) during musle relaxation:
a- pump Ca+2 back to the sarcoplasmic reticulum
b- sliding actin over myosin
23) regarding autonomic
parasympathetic originate from craniosacral
24) sympthetic
a- constriction of pupil
b-bronchodilation
c-decrease HR
d-increase gastric motility
e-decrease blood supply in skeletal muscle
25)all preganglionic fibers release Ach
26) wrong : preganglionic short than postganglionic in parasympathetic
27)
blood vessels in skeletal muscles
28) which of the following cardic tissue has the highest conduction velocity
a-purkungi fibers
b-SA node
c-atrial muscle
d- AV node
c-internodal tract
29) phase 3 in the action potential of the cardic due to
a- K+ efflux
b-Na+ influx
c-ca+ influx
30) ARP
no excitability due to complete depolarization even by suprathreshold
31) all of the following chronotropic factor except
a-sympthetic
b-digitalis
c-K+ ion
d-Ca+2
e-norepinphrin
32)norepinephrin released at sympathetic
increase the slope of prepotential
34)regarding anatomical cardiovascular system
a- tricaspud valve between left atrium and left ventricle
b- aortic valve prevent backflow of blood to the lef ventricle during ventricular diastole
d-right ventricle offere more resistance (volume pump) than left ventricle
