Question

3) When the SNS increases cardiac output, a series of events occurs through innervation via adrenergic receptors to affect both autorhythmic cells and contractile fibers. Describe and explain the changes in the function of the two cell types as cardiac output is increased, including all the membrane proteins 1) As the left ventricle contracts, the increase in fluid pressure forces open the aortic semilunar valve. Explain the changes in blood pressure all the way to the capillaries. Putting together the previous two questions, now explain the changes in blood pressure and blood flow if the SNS is acting to its fullest, systemic activation

Answer 1

3) The sympathetic nervous system(SNS) is a part of the autoimmune nervous system (ANS) which also includes the parasympathetic nervous system (PNS) originates from the spinal cord. Its main function is to prepare the body for physical or mental activity called fight-or-flight response. It accelerates a) muscle blood flow b) dilates pupils c) increases heart rate d) increases respiration e) accelerates prespiration and f) arterial blood pressure. During normal bodily functions, the SNS helps to maintain homeostasis by maintaining a relatively consistent heart rate and blood pressure. When there is a stresssor incident, may lead to health problems like depressed immunity and other health diseases. The autorhythmic cells functions in the conduction system of heart and contractile fibres generate the contraction force. These two cells are designed to depolarize the atria and then help them to contract as a unit and then it depolarize the ventricles and make them contract as a unit.