Case 1 Study Questions and Answers

Case 1 Study Questions and Answers The heart is the central unit that pumps blood into 2 circuits, the pulmonary and systemic circuits. Define cardiovascular function sends deoxygenated blood to the lungs for removal of co2 and reoxygenates the blood Define the pulmonary circuit carries oxygenated blood through the aorta and around the body to supply oxygen to all our organs and tissues Define the systemic circuit True True or false? The heart acts as a 2 sided pump, the right side pumping blood to the lungs and the left side pumping blood to the body. The heart is innovated by the autonomic nervous system What is the neuronal control of the heart? Via the sympathetic and parasympathetic systems How is the heart extrinsically innervated? Sympathetic nerves innervate all of the heart, the pacemakers and the cardiac muscle Speed up heart rate and force of contraction Acts at the cardio acceleratory centre in the medulla What is the role of the sympathetic nervous system in heart innervation? Parasympathetic nerves only innervate the pacemakers Acts at the cardioinhibitory centre in the medulla Relaxes down heart rate and force of contraction What is the role of the parasympathetic nervous system in heart innervation? To T1 to T5 in the spinal cord chain