What is the role of the arterioles?

Which one of the following graphs best describes the Blood Pressure (BP) change when blood moves from aorta to capillaries?

Given below are sets of five terms each. Rewrite the terms in correct order in a logical sequence beginning with the first word that is underlined:

Artery, Capillaries, Venule, Vein, Arteriole.

Given below are three statements (I–III) 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?

 Given below is a schematic representation of secretion of gland A and a blood capillary in its close proximity,

 What do the arrows outside the blood capillary indicate?

Represent the union of two sets by Venn diagram for each of the following.

$X=\{x | x$ is a prime number between $80$ and $100\}$

$Y=\{y | y$ is an odd number between $90$ and $100\}$