NEET Zoology Body Fluids And Circulation Class 11 Questions

Which of the these has a double closed type of circulatory system?

Role of pacemaker is:

What would be the cardiac output of a person having 72 heart beats minute and stroke volume of 50 ml?

Pacemaker of the heart in man is situated in:

Lack of blood supply to heart muscles that destroys myocardial cells is -

How many statements are correct? (i) Your heart is myogenic. (ii) Medulla oblongata can moderate the cardiac function through ANS. (iii) Erythroblastosis foetalis can be avoided by administering Rh antigens to the mother immediately after the delivery of the first child. (iv) Birds and mammals have double circulation of blood. (v) In amphibians, heart pumps mixed blood to the body.

Cardiac activities of the heart are regulated by: A. Nodal tissue B. A special neural centre in the medulla oblongata C. Adrenal medullary hormones D. Adrenal cortical hormones Choose the correct answer from the options given below:

Following are the stages of pathway for conduction of an action potential through the heart: A. AV bundle B. Purkinje fibres C. AV node D. Bundle branches E. SA node

Match List I with List II:

Match List I with List II.

Which of the following statements are correct? A. Basophils are most abundant cells of the total WBCs B. Basophils secrete histamine, serotonin and heparin C. Basophils are involved in inflammatory response D. Basophils have kidney shaped nucleus E. Basophils are agranulocytes Choose the correct answer from the options given below:

Given below are two statements: Statement I: The coagulum is formed of network of threads called thrombins. Statement II: Spleen is the graveyard of erythrocytes. In the light of the above statements, choose the most appropriate answer from the options given below:

Which one of the following statements is correct?

Persons with ‘AB’ blood group are called as “Universal recipients”. This is due to:

Which enzyme is responsible for the conversion of inactive fibrinogens to fibrins?

The QRS complex in a standard ECG represents:

Match the following columns and select the correct option.

What would be the heart rate of a person if the cardiac output is 5 L, blood volume in the ventricles at the end of diastole is 100 mL and at the end of ventricular systole is 50 mL?

Match the Column – I with Column – II:

Match the items given in Column I with those in Column II and select the correct option given below.

Match the items given in Column I with those in Column II and select the correct option given below.

Adult human RBCs are enucleate. Which of the following statement(s) is/are most appropriate explanation for this feature? i. They do not need to reproduce. ii. They are somatic cells. iii. They do not metabolize. iv. All their internal space is available for oxygen transport.

Blood pressure in the pulmonary artery is

Which one of the following is CORRECT?

Blood pressure in the mammalian aorta is maximum during

Erythropoiesis starts in

Person with blood group AB is considered as universal recipient because he has

The figure shows a human blood cell. Identify it and give its characteristics :-