What is a myogenic heart? Describe the mechanism regulating the heartbeat in mammals.
Last updated date: 23rd Mar 2023
•
Total views: 294.9k
•
Views today: 3.73k
Answer
294.9k+ views
Hint: It is the property related to continuous contraction and relaxation of the heart.
Complete answer:
The myogenic heart is the characteristics of vertebrates where continuous rhythmic contraction occurs. The myogenic heart is the intrinsic property of the cardiac muscles. Each contraction of the heart muscle regulates the flow of blood in the form of a pulse or heart rate.
The mechanism regulating the heartbeat in mammals.
1. The heart circulates the blood in different tissues of the body in the case of mammals.
2. Mammals have a four-chambered heart through which blood flows.
3. These chambers are divided as right atrium as the upper portion of the right side and the lower portion is right ventricle while the upper left portion is left atrium and the lower left portion is left ventricle.
4. The right atrium consists of the sinus node or a Sinoatrial (SA) node which acts as the pacemaker for the heart.
5. The functioning of the SA node and the regulation of the heartbeat is under the control of the body’s nervous system.
6. Each time the heart muscle contracts the blood will flow in the form of pulse or heart rate.
Note: Heart rate is controlled by the autonomic nervous system which is divided into two types – sympathetic and parasympathetic nervous systems. The sympathetic nervous system releases the hormones catecholamines – epinephrine and norepinephrine to accelerate the heart rate.
- The pulse rate is measured in beats per minute.
- Normal human being’s heart beats around 72 times in a minute.
- Exercises and stress may lead to an increase in heart rate as the flow of blood becomes faster to overcome the need for oxygen.
Complete answer:
The myogenic heart is the characteristics of vertebrates where continuous rhythmic contraction occurs. The myogenic heart is the intrinsic property of the cardiac muscles. Each contraction of the heart muscle regulates the flow of blood in the form of a pulse or heart rate.
The mechanism regulating the heartbeat in mammals.
1. The heart circulates the blood in different tissues of the body in the case of mammals.
2. Mammals have a four-chambered heart through which blood flows.
3. These chambers are divided as right atrium as the upper portion of the right side and the lower portion is right ventricle while the upper left portion is left atrium and the lower left portion is left ventricle.
4. The right atrium consists of the sinus node or a Sinoatrial (SA) node which acts as the pacemaker for the heart.
5. The functioning of the SA node and the regulation of the heartbeat is under the control of the body’s nervous system.
6. Each time the heart muscle contracts the blood will flow in the form of pulse or heart rate.
Note: Heart rate is controlled by the autonomic nervous system which is divided into two types – sympathetic and parasympathetic nervous systems. The sympathetic nervous system releases the hormones catecholamines – epinephrine and norepinephrine to accelerate the heart rate.
- The pulse rate is measured in beats per minute.
- Normal human being’s heart beats around 72 times in a minute.
- Exercises and stress may lead to an increase in heart rate as the flow of blood becomes faster to overcome the need for oxygen.
Recently Updated Pages
Most eubacterial antibiotics are obtained from A Rhizobium class 12 biology NEET_UG

Salamin bioinsecticides have been extracted from A class 12 biology NEET_UG

Which of the following statements regarding Baculoviruses class 12 biology NEET_UG

Sewage or municipal sewer pipes should not be directly class 12 biology NEET_UG

Sewage purification is performed by A Microbes B Fertilisers class 12 biology NEET_UG

Enzyme immobilisation is Aconversion of an active enzyme class 12 biology NEET_UG

Trending doubts
Difference Between Plant Cell and Animal Cell

Write an application to the principal requesting five class 10 english CBSE

Ray optics is valid when characteristic dimensions class 12 physics CBSE

Give 10 examples for herbs , shrubs , climbers , creepers

Write a letter to the principal requesting him to grant class 10 english CBSE

List out three methods of soil conservation

Epipetalous and syngenesious stamens occur in aSolanaceae class 11 biology CBSE

Change the following sentences into negative and interrogative class 10 english CBSE

A Short Paragraph on our Country India
