Biology Mcqs

Aerating openings formed in the bark through which exchange of gases takes place and water is lost in the form of vapours are___________?

A. Hydathods
B. Stomata
C. Lenticels
D. None of these

Which of the following are proteins in nature?

A. Antibodies.
B. Interferons
C. Antitoxins
D. All of these

Cooley’s anemia is another name used for___________?

A. Leucemia
B. Thalassaemia
C. Sickle cell anemia
D. None of these

Tricuspid valve is present_____________?

A. Between right atrium and right ventricle
B. Between left atrium and left ventricle
C. At base of pulmonary artery
D. At base of aorta

QRS complex represents____________?

A. Atrial systole
B. Ventricular systole
C. Atrial diastole
D. Ventricular diastole

Which of the following have thickest walls?

A. Arteries
B. Veins
C. Capillaries
D. None of these

It is the measure of force with which blood pushes up against the walls of blood vessels.

A. Stroke volume
B. Cardiac output
C. Blood pressure
D. Blood flow

All of the follwing are blood clots except:___________?

A. Thrombus
B. Embolus
C. Atheroma
D. Hematoma

It is the discharge of blood from blood vessels?

A. Myocardial infarction
B. Cerebral infarction
C. Cerebral Hemorrhage
D. Thromboembolism

The flow of lymph is maintained by__________?

A. Movement of viscera
B. Breathing movements
C. Valves
D. All of these