In which the following can increase the rate of heart beat ? ltbr. (A) Sympathetic neaural signals.
(B) Parasympathetic neural signals
(C ) Adrenal medullary hormones.
(9 ) Vagus nerve
(E ) Thyroxine hormone
(F) Acetylcholine

In which the following can increase the rate of heart beat ? (A) Sympathetic neaural signals. (B) Parasympathetic neural signals (C ) Adrenal medullary hormones. (9 ) Vagus nerve (E ) Thyroxine hormone (F) Acetylcholine

How many of the following factors can decrease the heart rate ? (A) Injection of acetyl choline (B) Increased body temperature (C) Release of adrenal medullary hormones (D) Release of thyroxine hormone

Assertion : Neural signals through the sympathetic nerves can increase the rate of heart beat, the strength fo ventriculrar contraction and thereby the cardiac output. Reason : Adrenal medullary hormones can increase the cardiac output.

P.Normal activities of the heart are regulated extrinsically i. e auto regulated by specialized muscles. Q. A special neural center in the medulla oblongata can moderate the cardiac function through the autonomic nervous function ( ANS) . R. Parasympathetic mental signals decrease the rate of heartbeat. S. Adrenal medullary hormones increase cardiac output. How many of the given statements are incorrect about the regulation of cardiac activities ?

P.Normal activities of the heart are regulated extrinsically i. e auto regulated by specialized muscles. Q. A special neural center in the medulla oblongata can moderate the cardiac function through the autonomic nervous function ( ANS) . R. Parasympathetic mental signals decrease the rate of heartbeat. S. Adrenal medullary hormones increase cardiac output. How many of the given statements are incorrect about the regulation of cardiac activities ?

Presence of which of the following hormones can increase the strength of ventricular contraction, a. Epinephrine, b. Acetylcholine, c. Nor adrenaline, d. Catecholamines

Presence of which of the following hormones can increase the strength of ventricular contraction, br a. Epinephrine, br b. Acetylcholine, br c. Nor adrenaline, br d. Catecholamines