Thursday, September 12, 2019

Blood Pressure Types | Hormones and Blood Pressure Relation

Blood Pressure Definition:
Blood pressure is defined as the lateral pressure exerted by the column of blood on the wall of the arteries while blood flows through it. Normally, Blood Pressure refers to arterial blood pressure.

What Is Normal Blood Pressure?
Blood pressure is usually expressed with the systolic pressure written above the diastolic pressure as follows-

Blood pressure (BP) = 120/80mmHg (Systole/Diastole). 
Blood pressure measurement
Fig: Blood pressure measurement
Different Types of Blood Pressure:
There are various types of blood pressure which are listed in the below:
  1. Systolic blood pressure,
  2. Diastolic blood pressure,
  3. Pulse pressure,
  4. Mean arterial blood pressure.
All the above blood pressure types have discussed in the following:

1. Systolic Blood Pressure (Systolic Pressure):
It is the maximum pressure by the blood on the arterial wall during the systole of the heart.

Normal systolic pressure: 120mmHg (Range: 110-140mmHg).

2. Diastolic Blood Pressure (Diastolic Pressure):
It is the minimum pressure exerted on the arterial wall during diastole of the heart.

Normal diastolic pressure: 80mmHg (Range: 60-80mmHg).


3. Pulse Pressure:

It is the difference between the systolic pressure and diastolic pressure.

Normal pulse pressure: 40mmHg (Range: 30-40mmHg).

4. Mean Arterial Blood Pressure (Mean Pressure):
This type of blood pressure is the average pressure existing in the arteries. Mean arterial blood pressure is the diastolic pressure plus one-third of pulse pressure.

Normal mean pressure: 93mmHg (80+13=93)

Hormones Involved in Regulation of Blood Pressure:
Those hormones which regulate blood pressure have listed in the following:

Hormones which increase blood pressure:
It includes-
  • Noradrenaline,
  • Vasopressin (ADH),
  • Serotonin
  • Adrenaline,
  • Angiotensin,
  • Aldosterone,
  • Thyroxin.
Hormones which decrease blood pressure:
It includes-
  • A vasoactive intestinal polypeptide (VIP),
  • Bradykinin,
  • Prostaglandin,
  • Histamine,
  • Acetylcholine,
  • The atrial natriuretic peptide,
  • Brain natriuretic peptide,
  • C-type natriuretic peptide.
Importance of Blood Pressure:
There are some key importance’s of blood pressure which are pointed out in the below:
  1. Blood pressure is essential for the flow of blood through blood vessels.
  2. This type of blood pressure provides the motive force for filtration at the capillary bed which is necessary for-
  • Tissue nutrition,
  • Formation of lymph,
  • Formation of urine,
  • Venous return.
More questions related to this article:
  1. What is meant by blood pressure?
  2. What is the definition of blood pressure?
  3. What is normal blood pressure?
  4. Define the term “Blood Pressure”.
  5. Mention the names of hormones that regulate blood pressure.
  6. Name the different types of blood pressure with their normal values.
  7. What are the types of blood pressure?
  8. Mention the classification of blood pressure.