What is the stroke volume of an adult human heart?
50 mL
70 mL
90 mL
100 mL
B.
70 mL
During a cardiac cycle, each ventricle pumps out approximately 70 mL of blood which is called stoke volume. This stroke volume when multiplied by the heart rate (number of beats per min) gives the cardiac output.
The integral membrane protein that carries blood group antigenic determinants is
Rhodopsin
Seipin
Glycophorin
CD36
Intrinsic and extrinsic pathways of blood clotting are interlinked at the activation steps of which of the following factors?
Factor IX
Factor IV
Factor X
Factor XIIIa
Identify the incorrect statements.
I. Members of gastropoda exhibit 'torsion'.
II. Aristotle lantern is present in heart urchins.
III. Anthozoans are polyploid forms.
IV. Diplopoda includes centipedes.
II and III
III and Iv
II and IV
I and II
When a red blood cell loses water by osmosis the shrinking of the cell volume leads to crinkling of the plasma membrane, called
Flacidity
Bursting
Crenation
Tonicity
Which of the followings is/are correct for the inheritance of genes involved in human 'ABO' blood grouping?
It is inherited by complete dominant allele
It is inherited by complete recessive allele
It is inherited by codominant allele
It is inherited by single gene with more than two alleles
Each 100 mL of human arterial blood carries 'P' mL of O2 and 'Q' mL of CO2, whereas each 100 mL of venous blood carries 'R' mL of O2 and 'S' mL of CO2. Choose the correct values of P, Q, R and S.
P =48 mL; Q=19 - 20 mL; R=52 mL; S = 14 - 15 ml
P= 19 - 20mL; Q= 48 mL; R= 14 - 15mL; S =52 mL
P = 14 - 15mL; Q = 52mL; R = 19 - 20 mL; S = 48mL
P = 52 mL; Q =14 - 15mL; R = 48 mL; S = 19 - 20 mL
With refrence to the circulatory system of human foetus, which of the following statement is not correct?
Ductus arteriosus connects the pulmonary artery to the aorta
Foetal haemoglobin combines more readily with oxygen than adult haemoglobin does
Ductus venosus carries blood from placenta and foetal gut directly to the fetal liver
Blood is pumped to the placenta by the foetal heart
Select correct combination of statements for lymph.
I. It helps to maintain fluid balance of the body.
II. It is contained in lymphatic vessels and lymphatic organs in mammals.
III. It is derived from tissue fluid.
IV. It contains less antibodies than plasma.
V. Flows in both directions.
VI. It helps to conserve proteins and remove bacteria.
I, II, III, V
II, III, IV, VI
I, IV, V, VI
III, IV, V, VI
