List of top Zoology Questions on body fluids and circulation

निम्नलिखित में से कौन सा कथन गलत है ?

The number of action potentials generated by sino-atrial node (SAN) in a healthy human is ______ per minute.

Number of amino acids in human insulin:

Consider the following statements: Assertion (A): Arteries are more elastic than veins. Reason (R): The wall of arteries has thick muscular wall and two elastic laminae.

Match the following lists regarding blood coagulation inhibitors and factors: A) Heparin, B) Tissue thromboplastin, C) Warfarin, D) EDTA (I) Antagonistic to Vit-K, (II) Binds to calcium ions, (III) Inactivates thrombin, (IV) Activates Proconvertin

Indian carp is

Consider the following statements:
Assertion (A): In cardiac cycle, whenever ventricles relax, the second sound dup is produced.
Reason (R): Closure of semilunar valves of pulmonary valve and aortic valve.
The correct answer is

Choose the wrongly matched pair

Consider the following statements:
Assertion (A): During blood clotting, at one stage, soluble fibrin is formed
Reason (R): Factor XIII, released from platelets, converts it into insoluble fibrin fibres. Factor XIII replaces the hydrogen bonds present among the monomers of soluble fibrin with covalent bonds

Number of amino acids in polypeptide chain A and polypeptide chain B of insulin

Assertion (A): In amphibians and reptiles the blood circulation is described as incomplete double circulation.
Reason (R): They have a single ventricle in the heart, where oxygenated and deoxygenated blood are mixed and then circulated to the body parts as mixed blood.