Zoology - Body Fluids and Circulation Question with Solution | TestHub
Given below are four statements (I–IV) regarding the human blood circulatory system.
(I) In the treatment of angina pectoris, nitrous oxide and nitroglycerine are used.
(II) Veins have thinner walls and broader lumen than arteries.
(III) Artificial pacemakers are used in arrhythmia.
How many of the above are correct statements?
Options:
Answer:
Solution:
In the treatment of angina pectoris, nitrous oxide and nitroglycerine are recommended, and they are proved to be very effective. Veins have a thinner wall and larger lumen, while arteries have thicker walls and a smaller lumen. Pacemaker is a small artificial device placed in the chest or abdomen for controlling abnormal heart rhythms. This device is used to treat arrhythmias and uses electrical pulses to prompt the heart to beat at a normal rate.
