Daance Module 1-Basic Sciences Questions And Answers Guaranteed A+

Neurons do what - correct answer conduct nerve impulses What is the synapse - correct answer junction between two neurons What makes up the central nervous system - correct answer brain and spinal cord What three parts make up the brain - correct answer cerebrum, cerebellum, medulla oblongata What makes up the peripheral nervous system - correct answer sensory nerves and motor nerves How many cranial nerves are there - correct answer 12 What nerve is the trigeminal nerve - correct answer 5 What parts does the trigeminal nerve control - correct answer supplies sensation to the teeth and jaw What are the 2 components of the autonomic nervous system? - correct answer sympathetic nervous system Parasympathetic nervous system What nervous system "speeds things up" - correct answer sympathetic What nervous system "slows things down" - correct answer parasympathetic What nervous system has terminations in all level of the heart - correct answer sympathetic nervous system Stimulation of the sympathetic nervous system causes what? - correct answer vasoconstriction in general and increases the heart rate What nervous system is important in maintaining blood pressure - correct answer sympathetic Vasomotor is controlled by the - correct answer sympathetic nervous system The vasomotor does what - correct answer controls the diameter of the blood vessels Baroreceptors regulate what function - correct answer blood pressure with positional changes the sympathetic or adrenergic effects of the autonomic nervous system involve what - correct answer two effects A and B- these effect several tissues and organs Alpha effect is what (only one alpha) - correct answer vasoconstriction Beta effect is what( two beta categories) - correct answer seen in bigger organs, heart and lungs Beta 1 activity is where - correct answer heart related functions- such as increased heart rate and strength of contraction Beta 2 activity is where - correct answer pulmonary function of bronchiolar dilation (lungs) Parasympathetic stimulation causes what - correct answer increased activity of digestive tract and stimulates production of saliva and pharyngeal secretions. (atropine or Robinul can counteract stimulations) Automaticity - correct answer heart pumps on its own Heart has four chamber- what are they - correct answer left atrium, right atrium, left ventricle, right ventricle Where does the left atrium receive blood from - correct answer from the lungs, via the pulmonary vein- oxygen rich blood Where does the right atrium receive blood from - correct answer from the peripheral (body's) circulation and is oxygen poor the ventricles receive blood from where - correct answer the atria Ventricle anatomy - correct answer thicker walls larger chambers left ventricle is the thickest m. Where does the right ventricle send blood - correct answer deoxygenated blood to the lungs Where does the left ventricle send blood - correct answer oxygenated blood to the body/ peripheral circulation What are the three sources the right atrium receives blood - correct answer above: superior vena cava below: inferior vena cava inside the heart m.: coronary sinus the blood in veins are considered what - correct answer oxygen poor blood vessels leading AWAY from the heart are - correct answer arteries blood vessels leading TO the heart are - correct answer veins Flow of Blood through the heart - correct answer 1. right atrium fills with blood 2. contracts- tricuspid valve 3. right ventricle fills with blood 4. 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. closure of the four valves prevents back flow. if valve is damaged then this will be a - correct answer heart murmur or mitral valve prolapse most heart problems are because of - correct answer faulty or reduced coronary circulation- the hearts own circulatory system reduced oxygen supply weakens the heart this condition is called - correct answer ischemia what results from ischemia - correct answer angina pectoris- chest pain poor circulation can also cause - correct answer myocardium infarction arteries can either ________ or _________ - correct answer vasodilation or vasoconstriction diastolic phase is during what part of the blood flow - correct answer when the ventricles are relaxed diastolic pressure measures what - correct answer the pressure in the arteries during the relaxation of the ventricles systolic phase is what part of the blood flow - correct answer when the ventricles contract systolic pressure measures what - correct answer the pressure in the arteries during the contraction of the ventricles cardiac cycle - correct answer 60-100 beats/minute bradycardia - correct answer less than 60 tachycardia - correct answer greater than 100 sinoatrial node (SA) - correct answer located right atrium pacemaker of the heart rhythms caused by the SA node are called what - correct answer sinus rhythms ectopic pacemakers occur when - correct answer when the SA node fails- they will be produced and take over as the pacemaker the impulse from the SA Node travels to where - correct answer the atrioventricular node (AV) after the AV node is stimulated where does the impulse go - correct answer bundle of His where does the impulse go after the bundle of His - correct answer purkinje fiber system the Purkinje system does what with the impulse - correct answer fibers that branch into the right and left ventricles and the ventricles will contract does the AV node speeds up or slows down the impulse - correct answer slows down Stroke Volume - correct answer 60 mL of blood (30 mL = 1 oz) amount of blood pumped by the left ventricle in one beat cardiac output - correct answer total amount of blood pumped by the left ventricle in one minute stroke volume x heart rate =________ - correct answer cardiac output P wave is what - correct answer atrial depolarization QRS wave is what - correct answer ventricular contraction- ventricular depolarization T wave is what - correct answer Ventricular repolarization makes the ventricle muscle ready for a new contraction