Term
|
Definition
| anatomical region extending from the sternum to the vertebral colum, the first rib to the diaphragm, and in between the lungs |
|
|
Term
| why does the heart sit a little to the left? |
|
Definition
| because the ?RIGHT? ventricle is bigger |
|
|
Term
| what is the posterior surface of the heart? |
|
Definition
| the back side of the heart |
|
|
Term
|
Definition
| membrane surrounding and protecting the heart |
|
|
Term
| 3 parts of the pericardium |
|
Definition
1. fibrous pericardium
2. serous pericardum
3. pericardial fluid |
|
|
Term
|
Definition
-makes sure your heart doesnt move around
- prevents overstretching and protection
-tough |
|
|
Term
|
Definition
-on the visseral(on the heart) of heart
-double layer
- thin |
|
|
Term
|
Definition
|
|
Term
|
Definition
-
external layer
-
smooth, slippery
|
|
|
Term
|
Definition
- muscle
- 95% of heart is cardiac muscle
|
|
|
Term
|
Definition
- inner layer
- smooth lining for chamber of heart
|
|
|
Term
|
Definition
| recieving chamber from body and lungs |
|
|
Term
|
Definition
| make sure heart doesnt get too full of blood |
|
|
Term
|
Definition
| muscular pumping chambers |
|
|
Term
|
Definition
| grooves on the surface of the heart |
|
|
Term
|
Definition
right atrium
tricuspid
right ventricle
pulmonary valve
pulmonary trunk
pulmonary artery
lungs
pulmonary veins
left atrium
bicuspid (mitral) valve
left ventricle
aortic valve
aorta
body
superior/inferior vena cava |
|
|
Term
|
Definition
| helps with rythym and makes sure no over flow |
|
|
Term
|
Definition
| separates the right and the left atrium |
|
|
Term
|
Definition
| separates right atrium form right ventricle |
|
|
Term
| what is the thickest chamber of the heart? |
|
Definition
|
|
Term
|
Definition
- pumps blood to body
- works harder to maintain same rate of blood flow as right ventricle
|
|
|
Term
| where does the right ventricle pump blood to? |
|
Definition
|
|
Term
| where does the left ventricle pump blood to? |
|
Definition
|
|
Term
| what is a dense connective tissue that forms a structural foundation, point of insertion for muscle bundles, and electrical insulator between atria and ventricles? |
|
Definition
|
|
Term
| door ways until the preasure opens them? |
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
| the ends of fibers are conected by... |
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
| allow action potential conduction from one fiber to the next |
|
|
Term
|
Definition
specialized cardiac muscles
|
|
|
Term
|
Definition
- contractile fibers have stable resting membrane potential
- voltage gated fast Na channels open
- Na flows in
- then deactivate and Na inflow decreases
|
|
|
Term
|
Definition
- period of maintained depolarization
- slow ca channels
- ca moves from interstitial fluid int sytosol
- triggers contraction
|
|
|
Term
|
Definition
| recovery of resting membrane potential |
|
|
Term
|
Definition
time interval during which second contraction cannot be triggered
|
|
|
Term
|
Definition
- composite record of action potentials produced by all the heart muscle fibers
|
|
|
Term
|
Definition
| compare tracings from different leads with one another and normal records |
|
|
Term
|
Definition
|
|
Term
| cardiac action potential arises in? |
|
Definition
| SA node, and P waves appear |
|
|
Term
| during atrial sytole .... are relaxed |
|
Definition
|
|
Term
| during ventricle systole... are relaxed |
|
Definition
|
|
Term
|
Definition
| volume of blood ejected from left (or right) ventricle into aorta (or pulmonary trunck) each minute |
|
|
Term
|
Definition
| difference between maximum CO and CO at rest |
|
|
Term
|
Definition
degree of stretch on the heart before it contracts
(pulling back a sling shot) |
|
|
Term
|
Definition
| volume of blood returning to right ventricle |
|
|
Term
|
Definition
|
|
Term
|
Definition
| strength of contraction at any given preload |
|
|
Term
| positive inotropic agents |
|
Definition
|
|
Term
| negative inotropic agents |
|
Definition
|
|
Term
|
Definition
| cant breathe off their CO2 |
|
|
Term
|
Definition
|
|
Term
|
Definition
| pressure that must be overcome before a semilunar valve can open |
|
|
Term
| what tells the SA node to slow down? |
|
Definition
|
|
Term
| increase HR and contractility |
|
Definition
| thyroid, epinephrine and norepinephrine |
|
|
Term
|
Definition
| site of exchange in blood vessel, allows diffusion |
|
|
Term
|
Definition
| lining in blood vessel and heart |
|
|
Term
|
Definition
| inner linnig in direct contact with blood |
|
|
Term
|
Definition
| muscular and connective tissure layer of blood vessel |
|
|
Term
|
Definition
- elastic and collagen fibers
- helps keep blood supply
- helps keep in place
|
|
|
Term
|
Definition
| union of the branches of 2 or more ateries supplying the same body region |
|
|
Term
|
Definition
| abundant microscopic vessels |
|
|
Term
|
Definition
|
|
Term
| connects arterial flow and venous return |
|
Definition
|
|
Term
|
Definition
| movement of substances between blood and interstitial fluid |
|
|
Term
|
Definition
| brings in what it needs and gets rid of what they dont need |
|
|
Term
|
Definition
| passive process in which large numbers of ions, molecules, or particles in a fluid move together in the same direction |
|
|
Term
| important for solute exchange |
|
Definition
|
|
Term
| important for regulation of relative volumes of blood and intestitial fluid |
|
Definition
|
|
Term
| from capillaries into interstitial fluid |
|
Definition
|
|
Term
| from interstitial fluid into capillaries |
|
Definition
|
|
Term
|
Definition
| pressure that promote reabsorption |
|
|
Term
|
Definition
| nearly as much reabsorbed as filtered |
|
|
Term
|
Definition
| volume of blood that flows throught any tissure in a given period of time |
|
|
Term
| contraction of ventricles generates? |
|
Definition
|
|
Term
|
Definition
| highest pressure attained in arteries during systole |
|
|
Term
|
Definition
| lowest aterial pressure during diastole |
|
|
Term
opposition to blood flow due to friction between blood and walls of blood vessels
DEPENDS ON:
size of lumen
blood viscosity
total blood vessel length |
|
Definition
|
|
Term
|
Definition
| volume of blood flowing back to heart through systemic veins |
|
|
Term
occurs due to pressure generated by construction on left ventricle
|
|
Definition
|
|
Term
| monitor pressure changes and stretch in blood vessel walls |
|
Definition
|
|
Term
| monitor movements of joints and muscles to provide input during physical activity |
|
Definition
|
|
Term
|
Definition
| monitor concentration of various chemicals in the blood |
|
|
Term
| released by adrenal medulla in response to sympathetic stimulation |
|
Definition
| epinephrine and norepinephrine |
|
|
Term
| increases cardiac output by increasing rate and force of heart contractions |
|
Definition
| epiephrine and norepinephrine |
|
|
Term
- produced by hypothalamus
- released by posterior pituitary
- responds to decreased blood volume
- causes vasoconstriction, which increases BP
|
|
Definition
| antidiuretic hormone (ADH) or vasopressin |
|
|
Term
atrial natriuetic peptide (ANP)
|
|
Definition
- released by cells of atria
- lowers BP, by causing vasodialation and promoting loss of salt and water in urine
- reduces blood volume
|
|
|
Term
| how is the strength of heart beat determined? |
|
Definition
| determined by substances tht alter the movement of Ca through slow Ca channels |
|
|
Term
|
Definition
the amount of preassure exerted upon vessel walls by the blood
|
|
|
Term
|
Definition
| the ability of a tissure to vasoconstrict or casodialate blood vessels to meet metabolic demands of that tissue |
|
|
