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  • Cardiac activities of the heart are regulated by:

Q.136) 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

A) A, B and D only

B) A, B and C only

C) A, B, C and D

D) A, C and D only

 

Answers (1)

best_answer
  • A. Nodal tissue: Responsible for generating and conducting electrical impulses that regulate heartbeat (e.g., SA node, AV node). 

  • B. Medulla oblongata: Contains the cardiovascular center, which controls heart rate via autonomic nerves. 

  • C. Adrenal medullary hormones: Adrenaline and noradrenaline increase heart rate and cardiac output. 

  • D. Adrenal cortical hormones: Mainly involved in metabolism and electrolyte balance, not direct cardiac regulation. 

Hence, the correct answer is Option 2: A, B, and C only.

Posted by

Saniya Khatri

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