NEET BIOLOGY

Detailed explanation-1: -Final Answer: When a frog’s heart is removed from its body, it continues to beat for some time as the heart of a frog is myogenic in nature and also autoexcitable. Q. A frog’s heart, when taken out of its body, continues to beat for sometime. Select the best option from the following statements.

Detailed explanation-2: -The frog’s heart is independent of the neurological system to excite itself. So, the frog’s heart is autoexcitable. As a result, it continues to beat even after it has been removed from the body for some time.

Detailed explanation-3: -The biggest difference is that our hearts are four-chambered, while a frog has a three-chambered heart. We have two atrial chambers and two ventricles, while frogs have two atria and only one ventricle. In that ventricle, deoxygenated and oxygenated blood mix before being pumped back out into the body.

Detailed explanation-4: -The data for each frog were the means of five sessions. At time 0 the animal was gently handled for 1 min by the experimenter. The ordinates indicate the minimal (90 beats per min) and maximal (144 beats per min) lowest and highest frequencies recorded for 1-min periods in any R.

Detailed explanation-5: -Excitation of the frog heart heart is myogenic, that is, contraction of the heart originates within the muscle itself. In Amphibians, such as the frog, the pacemaker is the sinus venosus, an enlarged region between the vena cava and the right atrium.