max heart rate zone

The number of times the heart beats per minute is called heart rate. For a normal adult human it is about 72 times per minute. For infants, it is a higher figure. It also goes up during physical exercise. The contractions and relaxations that the heart chambe..

Rate of Heart Beat - The rhythmic contraction and relaxation of the heart to pump out and receive blood is called the heart beat. The rate of the heart beat varies from species to species. The smaller the animal, the higher is the metaboli..

Pulse is defined as the wave of distension and recoiling felt in the radial artery due to the contraction of the left ventricle which force about 70-90 ml of blood into the already full aort..

The Heart Beat - The heart beat results in electropotential differences spreading over the heart muscles. These follow a specific pattern. Any change in the pattern indicates an abnormality. The pattern can be recorded using an electrocardiograph. The recorded pattern ..

The heart beat results in electropotential differences spreading over the heart muscles. These follow a specific pattern. Any change in the pattern indicates an abnormality. The pattern can be recorded using an electrocardiograph. The recorded pattern is called the electrocard..

Heart - Cardiac Cycle - The heart has an increasing rhythmic activity. It pumps blood by its contraction and relaxation. The contraction of the heart is called systole and the relaxation is called diastole . The contraction and relaxation together constitute the h..

Control of the Heart Function - The control of the heart function is by a set of muscles and is, therefore, called myogenic . If the heart is removed from a living mammal and placed in a well oxygenated salt solution maintained at 37 o C, the heart continues ..

The diastolic blood pressure (in mmHg) and the heart rate (in beats per two minutes) of certain people are shown. Find the 90% prediction interval for the heart rate when the blood pressure is 88. Diastolic blood pressure ( x ) 50 55 60 65 70 75 80 85 90 ..

Cloud formation, lightning, thunder etc all take place in the troposphere. Air temperature in troposphere decreases with height at the rate of about 615 0 C per km.Stratosphere is free from clouds. Aeroplanes usually fly in this zone..

Oversecretion results in exophthalmic goitre in which the person shows a marked increase in metabolic rate, protrusion of eyes, rapid heart rate and shortness of breat..