Why do we call our heart myogenic? | Class 11 Biology Chapter Body Fluids and Circulation, Body Fluids and Circulation NCERT Solutions

Question: Why do we call our heart myogenic?

Answer:

In the human heart, contraction is initiated by a special modified heart muscle known as sinoatrial node. It is located in the right atrium. The SA node has the inherent power of generating a wave of contraction and controlling the heart beat. Hence, it is known as the pacemaker. Since the heart beat is initiated by the SA node and the impulse of contraction originates in the heart itself, the human heart is termed myogenic. The hearts of vertebrates and molluscs are also myogenic.

1
0
0
Report?

Report a problem on Specifications:

Email id:

Comments

< Previous Question

Next Question >

Popular questions of class 11 Biology

Q: Describe briefly the four major groups of Protozoa.

Q: Why are living organisms classified?

Q: State two economically important uses of: (a) Heterotrophic bacteria (b) Archaebacteria

Q: What is the difference between direct and indirect development?

Define a taxon. Give some examples of taxa at different hierarchical levels.

Q: Describe the important properties of enzymes.

What are the steps involved in formation of a root nodule?

Q: Illustrate the taxonomical hierarchy with suitable examples of a plant and an animal.

Q: How is a key helpful in the identification and classification of an organism?

Q: What is stomatal apparatus? Explain the structure of stomata with a labelled diagram.

Recently Viewed Questions of Class 11 Biology

How does butter in your food gets digested and absorbed in the body?

Write brief note on the following
a. Synaptonemal complex
b. Metaphase plate

Q: Differentiate between the following:
(a) Diffusion and Osmosis
(b) Transpiration and Evaporation
(c) Osmotic Pressure and Osmotic Potential
(d) Imbibition and Diffusion
(e) Apoplast and Symplast pathways of movement of water in plants.
(f) Guttation and Transpiration.

Q: Explain the following:
(a) Role of Na+ in the generation of action potential.
(b) Mechanism of generation of light-induced impulse in the retina.
(c) Mechanism through which a sound produces a nerve impulse in the inner ear.

During resting potential, the axonal membrane is polarised, indicate the movement of +ve and –ve ions leading to polarisation diagrammatically.

What is meant by living? Give any four defining features of life forms.

Correct the statements
a. Cells shrink in hypotonic solutions and swell in hypertonic solutions.
b. Imbibition is a special type of diffusion when water is absorbed by living cells.
c. Most of the water flow in the roots occurs via the symplast.

What is the role of radula in molluscs?

A flowering plant is planted in an earthen pot and irrigated. Urea is added to make the plant grow faster, but after some time the plant dies.
This may be due to _______________ .

Q: What is the basis of classification of algae?

Study Tips for Answering NCERT Questions:

NCERT questions are designed to test your understanding of the concepts and theories discussed in the chapter. Here are some tips to help you answer NCERT questions effectively:

Read the question carefully and focus on the core concept being asked.
Reference examples and data from the chapter when answering questions about Body Fluids and Circulation.
Review previous year question papers to get an idea of how such questions may be framed in exams.
Practice answering questions within the time limit to improve your speed and accuracy.
Discuss your answers with your teachers or peers to get feedback and improve your understanding.

Comments

Rushi
2020-03-22 23:20:13

Thank for help me to easy to understand and easy to learn tq a lot

Sagar Barman
2019-08-27 16:44:26

Thanks,for making the answer so easyðððð

Varshini R Gowda
2019-08-21 22:43:33

Tq a lot it helped me to score marks in subjective examination

Safi ahmad
2019-02-09 19:30:57

Thanks for help me

Neelav
2018-12-09 07:11:00

Thanks for help...

Siyana
2017-12-14 19:35:32

Good

umar basha
2016-09-04 19:35:22

thanx a lot for clearing my doubt

rupal
2016-01-20 01:55:55

Why we call our heart with a name heart why we don't call it with other name?

karan
2015-06-07 14:58:56

Thanks... For helping me.

Comment(s) on this Question

Welcome to the NCERT Solutions for Class 11 Biology - Chapter . This page offers a step-by-step solution to the specific question from Excercise 1 , Question 9: Why do we call our heart myogenic?....

Why do we call our heart myogenic? | Class 11 Biology Chapter Body Fluids and Circulation, Body Fluids and Circulation NCERT Solutions

< Previous Question

Next Question >

Popular questions of class 11 Biology

Recently Viewed Questions of Class 11 Biology

Study Tips for Answering NCERT Questions:

Comments

Comment(s) on this Question

Chapters for Class 11 Biology

Subjects for Class 11

Students Also Read

Important links

Quick Links

Resources

Support