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प्रश्न
What is hypertension? Why is it caused? What harm can it do?
उत्तर
Hypertension is the term used for high blood pressure. It is known as a "silent killer".
High blood pressure results from the tightening (constriction) of very small arteries called arterioles. Arterioles regulate the blood flow through our body. As these arterioles constrict, the heart has to work harder to pump the blood through the smaller space. Due to this, the pressure inside the vessels grows. Very high blood pressure can lead to the rupture of the artery and internal bleeding.
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संबंधित प्रश्न
Normal activities of the heart are regulated by ______________.
What are the components of the transport system in human beings? What are the functions of these components?
Name of the valve between the left atrium and left ventricle and give its significance.
Fill in the blank with suitable word given below:
The oxygen-rich blood from the lungs comes into the __________ of the heart.
Complete the following sentence with appropriate word:
The heart is made up of special muscles, the _______ muscles.
Column 2 is a list of items related to ideas in Column 1. Match the term in Column 2 with the suitable idea given in Column 1.
| Column 1 | Column 2 |
| (i) Superior vena cava | (a) Collect deoxygenated blood from the wall of the heart. |
| (ii) Inferior vena cava | (b) Carry oxygenated blood to heart muscle. |
| (iii) Pulmonary vein | (c) Collects deoxygenated blood from upper part. |
| (iv) Coronary veins | (d) Collects deoxygenated blood from lower parts. |
| (v) Coronary artery | (e) Brings oxygenated blood from lungs. |
| (vi) Aorta | (f) Large artery |
| (vii) Heart attack | (g) Large vein |
| (viii) Blood Pressure | (h) Oxygenated blood |
| (ix) Tricuspid valve | (i) Sphygmomanometer |
| (x) Bicuspid valve | (j) Allows blood flow from right auricle to right ventricle. |
| (xi) Contraction and relaxation of heart | (k) Blocking of coronary arteries. |
| (l) Cardiac muscle. | |
| (m) Allows blood flow from left auricle to left ventricle. | |
| (n) Allows blood flow from right ventricle of pulmonary aorta. |
The correct match of blood vessel, its connection and O2 content is ____________.
Analogy:
Heart: Pericardium membrane.
Lungs: ______.
Enlist the names and locations of valves of human heart giving function of each.
Give the exact location of the pericardium.
