Topic: Circulation: heart, cardiac cycle, ECG, double circulation, regulation, disorders· Human Physiology

Cardiac activities of the heart are regulated by :A. Nodal tissueB. A special neural centre in the medulla oblongataC. Adrenal medullary hormonesD. Adrenal cortical hormonesChoose the correct answer from the options given below :

1. A, B and C Only

2. A, B, C and D

3. A, C and D Only

4. A, B and D Only

Doubtly Asked 30 Oct 2026 NEET UG 2025 Practice test neet Save WhatsApp Report

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Best answer

Answer: 1. A, B and C Only

Key idea: The heart is regulated by nodal tissue (autorhythmic), the medullary cardiac centre (neural) and adrenal medullary hormones (adrenaline and noradrenaline, which raise heart rate).

Adrenal cortical hormones do not regulate cardiac activity directly. So A, B and C only.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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Cardiac activities of the heart are regulated by :A. Nodal tissueB. A special neural centre in the medulla oblongataC. Adrenal medullary hormonesD. Adrenal cortical hormonesChoose the correct answer from the options given below :

1 answer

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