Which one is incorrect in the following:

(1) Inter atrial septa – thin and muscular

(2) Atrio– ventricular septa – thick and fibrous

(3) Inter ventricular septa – thick and muscular

(4) Pericardium – muscular

SAN is present in __________ while AVN is present in __________.

(1) Right upper corner and left lower corner of both the atria.

(2) Right upper corner and left lower corner of right atrium.

(3) Right upper corner and left lower corner of left atrium.

(4) Right upper corner and left median corner of left atrium

Which one of the following is wrong with respect to nodal tissue.

(1) auto excitable

(2) not localized to a single chamber.

(3) equal ability to excite throughout nodal tissue.

(4) structural changes are observed throughout nodal musculature in different chambers of the heart.

The duration of cardiac cycle is–

(1) 0.8 second

(2) 0.5 second

(3) 0.3 second

(4) 0.4 second

The number of action potential generated by SAN:

(1) 70–75 times per minute.

(2) 50–72 times per minute.

(3) Exact 70 times per minute.

(4) not more than 60 times per minute.

The lub sound of heart is produced during which phase of cardiac cycle?

(1) ventricular systole

(2) atrial diastole

(3) joint diastole

(4) atrial systole

The machine taking the reading of electrical activity of heart is known as

(1) Electrocardiogram

(2) Electrocardiograph

(3) MRI

(4) Biopsy

The results of ECG are known as

(1) Electrocardiogram

(2) Electrocardiograph

(3) MRI

(4) Biopsy

The standard ECG is obtained by connecting the patient to the machine with how many leads?

(1) 4

(2) 3

(3) 1

(4) 2

If one wants to analyse the detailed cardiac activity, the multiple leads are attached to–

(1) Wrist and arms

(2) Abdomen

(3) Chest region

(4) all the fingers