DAANCE Module 1-Basic Sciences Questions & Answers Graded A+

neurons do what - Answer-conduct nerve impulses what is the synapse - Answer-junction between two neurons what makes up the central nervous system - Answer-brain and spinal cord what three parts make up the brain - Answer-cerebrum, cerebellum, medulla oblongata what makes up the peripheral nervous system - Answer-sensory nerves and motor nerves How many cranial nerves are there - Answer-12 what nerve is the trigeminal nerve - Answer-5 what parts does the trigeminal nerve control - Answer-supplies sensation to the teeth and jaw what are the 2 components of the autonomic nervous system? - Answer-sympathetic nervous system parasympathetic nervous system what nervous system "speeds things up" - Answer-sympathetic what nervous system "slows things down" - Answer-parasympathetic what nervous system has terminations in all level of the heart - Answer-sympathetic nervous systemstimulation of the sympathetic nervous system causes what? - Answer-vasoconstriction in general and increases the heart rate what nervous system is important in maintaining blood pressure - Answer-sympathetic vasomotor is controlled by the - Answer-sympathetic nervous system the vasomotor does what - Answer-controls the diameter of the blood vessels baroreceptors regulate what function - Answer-blood pressure with positional changes the sympathetic or adrenergic effects of the autonomic nervous system involve what - Answer-two effects A and B- these effect several tissues and organs Alpha effect is what (only one alpha) - Answer-vasoconstriction Beta effect is what( two beta categories) - Answer-seen in bigger organs, heart and lungs Beta 1 activity is where - Answer-heart related functions- such as increased heart rate and strength of contraction Beta 2 activity is where - Answer-pulmonary function of bronchiolar dilation (lungs) Parasympathetic stimulation causes what - Answer-increased activity of digestive tract and stimulates production of saliva and pharyngeal secretions. (atropine or Robinul can counteract stimulations) Automaticity - Answer-heart pumps on its own Heart has four chamber- what are they - Answer-left atrium, right atrium, left ventricle, right ventricleWhere does the left atrium receive blood from - Answer-from the lungs, via the pulmonary vein- oxygen rich blood Where does the right atrium receive blood from - Answer-from the peripheral (body's) circulation and is oxygen poor the ventricles receive blood from where - Answer-the atria Ventricle anatomy - Answer-thicker walls larger chambers left ventricle is the thickest m. Where does the right ventricle send blood - Answer-deoxygenated blood to the lungs Where does the left ventricle send blood - Answer-oxygenated blood to the body/ peripheral circulation What are the three sources the right atrium receives blood - Answer-above: superior vena cava below: inferior vena cava inside the heart m.: coronary sinus the blood in veins are considered what - Answer-oxygen poor blood vessels leading AWAY from the heart are - Answer-arteries blood vessels leading TO the heart are - Answer-veins Flow of Blood through the heart - Answer-1. right atrium fills with blood 2. contracts- tricuspid valve 3. right ventricle fills with blood4. contracts- closes tricuspid valve/opens pulmonary valve 5. blood goes through pulmonary artery to the lungs 6. pulmonary veins returns blood to left atrium 7. contracts-mitral valve 8. left ventricle fills with blood 9. Contracts- forces blood through aortic valve into aorta and then the peripheral circulation.