lab 7.6/7.7

cardiac output

amt of blood pumped by each ventricle per minute

peripheral resistance

resistance to blood flow thru arterioles

sphygmomanometer

how blood pressure is measured

what units is blood pressure measured in?

millimeters of mercury

when all parts of a fluid move in the same direction

laminar flow

some parts of the fluid move in radial and circumferential directions, churning and mixing blood

turbulent flow

layers of blood are mixed by eddies that flow at right angles to axial stream. turbulence set up vibrations in artery heard as sounds in the stethoscope

sounds of korotkoff

first sound heard (beginning of phase 1)

systolic pressure

sound disappears (beginning of phase 5)

diastolic pressure

difference between systolic and diastolic blood pressure

pulse pressure

diastolic pressure plus one-third of pulse pressure

mean arterial pressure

adequate blood flow through peripheral tissues

perfusion

narrow, muscular arteries and arterioles branching

arterial trees

how do we calculate pulse pressure?

systolic pressure - diastolic pressure

how can we calculate mean arterial pressure

diastolic pressure + 1/3 pulse pressure

what was the purpose of lab 7.6?

manually obtain the systolic and diastolic pressure of a person using the stethoscope and sphygmomanometer. then, calculate the pulse pressure and MAP using the data

how did we obtain blood pressure measurements?

laying down, standing up, sitting

what were the results of lab 7.6?

reclined position had a higher BP compared to standing/sitting. lowest BP was standing. gravitational force place a role on BP. lower gravitational force on blood when standing, allows for better circulation; higher BP

arterial blood pressure is directly dependent on ____ _____ and ______ ______

cardiac output, peripheral resistance

_____ occurs when some parts of the fluid move in radial and circumferential directions, churning and mixing the blood

turbulent flow

highest number of times your heart can beat per minute during strenuous exercise

maximum cardiac rate

milliliters per beat

stroke volume

milliliters per minute

cardiac output

measures the maximum rate of oxygen consumption by the body

maximal oxygen uptake/aerobic capacity

blood levels of lactate rising when exercise is performed at 50% to 70% of aerobic capacity

anaerobic capacity

higher levels of inhibitory activity by the vagus nerve innervation to the SA node

athlete’s bradycardia

inadequate blood flow to heart

myocardial ischemia

how did we calculate the 7.7 experiment and evaluate the score?

we added points and compared them to a given scale

what was the purpose of the 7.7 experiment?

we are evaluating our adaptations to our cardiovascular system by measuring our blood pressure after exercise