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Question
Which of the following is NOT correctly matched?
Options:
A .  Cardiac centres - Cardiovagal and Vasomotor
B .  Baroreceptors - Present in aorta and carotid
C .  Positive Inotropic action - Increases the firing rate of Sinoatrial node
D .  Negative Chronotropic effect - Increases the force of contraction of heart
Answer: Option D
:
D
The cardiac centres are of two types: cardiovagal and the vasomotor. Baroreceptors are sensors located in the blood vessels of all vertebrate animals. They sense the blood pressure and relay the information to the brain, so that a proper blood pressure can be maintained. An inotropic action alters the force or energy of muscular contraction.Change in contractility or force of contraction of the heart is also known as a chronotropic effect. Positive chronotropes increase heart rate; negative chronotropes decrease heart rate.

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