Zoology · Body Fluids and Circulation

NEET (UG) 2025 — Question 105

Cardiac activities of the heart are regulated by:

A. Nodal tissue

B. A special neural centre in the medulla oblongata

C. Adrenal medullary hormones

D. Adrenal cortical hormones

Choose the correct answer from the options given below:

Answer: A

The heart's rhythm is controlled by the sinoatrial (SA) node, which acts as the natural pacemaker.

This SA node is located in a special neural center within the medulla oblongata of the brain.

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