Question
Write a note on regulation of cardiac activity.
✓
Answer
The normal activities of the heart are intrinsically regulated, i.e., autoregulated by the specialised muscles, (nodal tissue). Thus, the heart is known as a myogenic heart.
The neurogenic heartbeat is initiated by a nerve impulse, e.g., annelids and most arthropods.
The rate of its formation and conduction is regulated by the following
i. Neural Regulation: In medulla oblongata, a special neural centre is present, which can moderate, the cardiac function thro the Autonomic Nervous System (ANS).
ii. Hormonal Regulation: Adrenaline and noradrenaline hormones secreted by the medulla of adrenal gland has a significant role in regulating heartbeat and thus increasing the cardiac output. The noradrenaline accelerates the heartbeat, while adrenaline does this function at the time of emergency
The neurogenic heartbeat is initiated by a nerve impulse, e.g., annelids and most arthropods.
The rate of its formation and conduction is regulated by the following
i. Neural Regulation: In medulla oblongata, a special neural centre is present, which can moderate, the cardiac function thro the Autonomic Nervous System (ANS).
ii. Hormonal Regulation: Adrenaline and noradrenaline hormones secreted by the medulla of adrenal gland has a significant role in regulating heartbeat and thus increasing the cardiac output. The noradrenaline accelerates the heartbeat, while adrenaline does this function at the time of emergency
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