The vertebrate heart is classified as
myogenic
neurogenic
amyogenic
both (a) and YW
Correct Answer :
A. myogenic
Related Questions
The chamber of the mammalian heart from which deoxygenated blood is sent for oxygenation is
right auricle
right ventricle
left auricle
left ventricle
Carotid artery carries
oxygenated blood to the heart
deoxygenated blood to the lungs
oxygenated blood to the brain
deoxygenated blood to the stomach
Rh factor is named after
monkey
chimpanzee
man
none of these
The left atrioventricular aperture in man is guarded by
tricuspid valve
simple valve
bicuspid or mitral value
sphincter value
William Harvey is known for the discovery of
muscle contraction
nerve conduction
renal excretion
blood circulation
The vein which carries oxygenated blood is
pulmonary
renal
coronary
azygous
Impulses from the pacemaker initiate
the ventricles to contract
the auricles to contract
both (a) and (b)
the relaxation of heart
The sympathetic nerve causes the heart rate to
increase
decrease
show no change
stroke volume increases
RBCs placed in a hypertonic solution
retain their size
shrink
burst
die
The diameter of capillaries for the RBCs to pass is
4 fim
less than 5 fim
more than 5 Jim
more than 10 Jim
The erythrocytes of mammals are non nucleated except in
rabbit
monkey
man
camel
Urea is transported by
WBC
RBC
haemoglobin
blood and plasma
The life of erythrocytes in mammalian blood is about
120 days
150 days
190 days
180 days
Universal donor is the person with the blood group
A
AB
B
O
Blood passes from the arterioles to venules via
lacteals
valved veins
capillaries
any of these
Universal recipient is the person with the blood group
A
B
AB
O
Blood leaving the liver and moving to the heart has usually high concentration of
urea
bile
glucose
erythrocytes
The least concentration of urea in mammals is carried in blood of
hepatic vein
renal vein
renal artery
hepatic artery
The process of blood cells formation is called
haemocytopoiesis
hematopoiesis
both (a) and (b)
none of these
The nerve like modified muscle in the right auricle is called
atrioventricular node
pacemaker
bulbus artriosus
none of these
Diapedesis is
movement of erythrocytes to injury site
migration of cells through the walls of blood capillaries into the tissue spaces
contraction of muscles
none of these
The blood platelets are the source of
hemoglobin
fibrinogen
thromboplastin
microelements
Emotions such as worry, anxiety, fear can elevate a person's blood pressure by
a rise in the systolic pressure
a rise in the diastolic pressure
a decrease in the systolic pressure
a decrease in the diastolic pressure
Clotting of blood oozing out of a wound, involves
drying as a result of evaporation of the plasma
denaturation of the blood albumins by thrombin
conversion of fibrinogen to fibrin by thrombin
haemolysis of erythrocytes
If clumping occurs in a given sample of blood with 'both A and B serum, the blood group was
A
AB
B
O
The pH of blood in arteries and veins is
same
more .in arteries and less in veins
not definite
less in arteries and more in veins
If blood cells from blood are elminated, the liquid left is
serum
plasma
water
haemoglobin
A person with blood group 'C required blood transfusion. Blood of which group can be given to him?
A only
AB only
Bonly
Oonly
Pulmonary artery carries blood from
heart to lungs
lungs to heart
lungs to right auricle
lungs to left auricle
The instrument used to measure the blood pressure is
sphygmomanometer
respirometer
thermometer
stethoscope