Tag: circulatory system

The adrenal glands, specifically through the secretion of hormones like aldosterone and adrenaline, play a critical role in regulating blood pressure. Aldosterone helps regulate blood volume by managing sodium and water retention.

Hypertension is generally defined as blood pressure consistently at or above 130/80 or 140/90 mm Hg. Among the choices, 140/100 represents a hypertensive reading.

Hypotension (low blood pressure) is often caused by fluid loss, blood loss, or endocrine issues. Excessive fluid intake would typically increase blood volume and potentially raise blood pressure rather than lower it.

In a blood pressure reading of 120/80, the top number (120) is the systolic pressure, which is the pressure during heart contraction. The bottom number (80) is the diastolic pressure.

When using a sphygmomanometer, the first sound heard (Korotkoff sound) as the cuff pressure is released corresponds to the systolic pressure. This is when the blood first begins to flow through the artery again.

A sphygmomanometer is used to measure both systolic and diastolic blood pressure. It does not measure cardiac output directly.

Hypertension is often caused by factors that narrow or harden arteries, such as atherosclerosis or arteriosclerosis, or by obesity. Anaemia is a condition characterized by a lack of red blood cells, which typically does not cause hypertension.

Pulse pressure is calculated as the difference between the systolic pressure and the diastolic pressure. Here, 120 - 80 = 40 mm Hg.

The pulse pressure is the difference between systolic and diastolic pressure. For a standard 120/80 reading, the difference is 120 - 80 = 40 mm Hg.

In a healthy adult man, the normal diastolic pressure is typically 80 mm Hg. This is the pressure in the arteries when the heart is at rest.