Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEET2020ZoologyBody Fluids and CirculationActual

Which of the following is associated with decrease in cardiac output?

Options

  1. ASympathetic nerves
  2. BParasympathetic neural signals
  3. CPneumotaxic centre
  4. DAdrenal medullary hormones

Correct answer

B. Parasympathetic neural signals

Step-by-step solution

The sympathetic nerve ending releases noradrenaline which stimulates the SAN that accelerates the heartbeat, the strength of ventricular contraction and thereby the cardiac output. The parasympathetic nerve ending releases acetylcholine which decreases the rate of heartbeat, speed of conduction of action potential and thereby the cardiac output. The adrenal medulla of the adrenal gland secretes two hormones called adrenaline and noradrenaline. Both the hormones are rapidly secreted in response to the stress of any

Practice Body Fluids and Circulation on Quantrex Academy →

More from Body Fluids and Circulation

The WBC count of a person's blood sample is 8000 /cu.mm. How many eosinophils and lymphocytes would be in the same blood sample approximately ? 2026Which of the following statements is incorrect ? 2026The opening between the right atrium and the right ventricle is guarded by __________. 2026The number of action potentials generated by sino-arterial node (SAN) in a healthy human is __________ per minute. 2026Select the incorrect statements with reference to Rh grouping : A. Erythroblastosis foetalis is a condition observed having foetus with Rh ^ -ve blood and mother with Rh ^ +ve bloo 2026Cardiac 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 Cho 2025'Lub' sound of Heart is caused by the ______ 2024Following are the stages of pathway for conduction of an action potential through the heart A. AV bundle B. Purkinje fibres C. AV node D. Bundle branches E. SA node Choose the corr 2024 Full Body Fluids and Circulation list All NEET PYQs