Neurons do what - correct answer conduct nerve impulses
What is the synapse - correct answer junction between two neurons
What makes up the central
... [Show More] 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 [Show Less]