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Assertion: Human heart is myogenic. Re...

Assertion: Human heart is myogenic.
Reason: Normal activities of the heart are regulated intrinsically, il.e., auto regulated by specialised muscles (nodal tissur).

A

If both asseration and reason are true and the reason is the correct explanation of the assertion.

B

If both assertion and reason are true but reason is not the correct explanation of the assertion.

C

If assertion is true reason is false.

D

If both assertion and reason are false.

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding the assertion and reason about the human heart being myogenic and the regulation of its activities, we can break it down into the following steps: ### Step-by-Step Solution: 1. **Understanding the Assertion**: - The assertion states that the human heart is myogenic. - Myogenic means that the heart muscle (myocardium) generates its own contractions without requiring external nervous stimulation. 2. **Analyzing the Reason**: - The reason provided is that the normal activities of the heart are regulated intrinsically, meaning that the heart regulates itself through specialized muscle tissues known as nodal tissue. - This nodal tissue includes the sino-atrial (SA) node, which is known as the pacemaker of the heart. 3. **Explaining the Role of the SA Node**: - The SA node initiates the electrical impulses that cause the heart to contract. - It generates action potentials that spread throughout the heart, leading to coordinated contractions. 4. **Understanding the Heart's Conduction System**: - After the SA node generates an impulse, it travels to the atrioventricular (AV) node, then to the bundle of His, and subsequently through the right and left bundle branches to the Purkinje fibers, resulting in ventricular contraction. 5. **Conclusion on Assertion and Reason**: - Both the assertion that the human heart is myogenic and the reason that its activities are auto-regulated by specialized nodal tissue are correct. - The reason provided is a correct explanation of the assertion. 6. **Final Answer**: - Therefore, the correct answer is that both the assertion and the reason are true, and the reason is the correct explanation for the assertion.
To solve the question regarding the assertion and reason about the human heart being myogenic and the regulation of its activities, we can break it down into the following steps: ### Step-by-Step Solution: 1. **Understanding the Assertion**: - The assertion states that the human heart is myogenic. - Myogenic means that the heart muscle (myocardium) generates its own contractions without requiring external nervous stimulation. ...
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