Term
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Definition
| the physical property of materials which return to their original shape after they are deformed |
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Term
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Definition
| is measure of the tendency of a hollow organ to resist recoil toward its original dimensions upon removal of a distending or compression force |
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Term
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Definition
Very elactic
Have large radii
Not compliant |
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Term
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Definition
Not elactic
Very complient
Store blood volume |
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Term
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Definition
| change of volume/ change in pressure |
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Term
| How much blood moves out of artery during systole? |
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Definition
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Term
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Definition
small arteries
resistance vessels
local control of blood flow
they are the major site of resistance |
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Term
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Definition
deliever blood to capillries
have smooth muscle that consrict vasoconstriction and dilate vasodilation |
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Term
| Major roles of arterioles |
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Definition
1) Determine blood flow to organs
2) Determin MAP |
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Term
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Definition
| Change in pressure/ resistance |
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Term
| Vasodilation and vasoconstriction are controlled by what two ways? |
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Definition
Local controls
Extrinsic controls |
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Term
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Definition
| mechanisms independent of nerves or hormones by which organs and tissues alter their own arerial reististances, thereby self - regulating their blood flows |
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Term
| Four ways of Local control of blood flow |
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Definition
1)Active hypermia
2)Flow autoregulation
3)Reactive hypermia
4)Response to injury (inflamation) |
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Term
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Definition
metabolizing tiusses causes arteriolar vasodilation due to increased need blood flow.
Increased metabolic activity
Metabolites: CO2, K, H, Adenosine, NO, bradykinin |
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Term
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Definition
intrinsic design to maintain constant blod flow despite changes in blood pressure.
Stretch sensitive calicum channels allow direct responeses to change in vessel (myogenic response) |
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Term
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Definition
Following occulison (vessel completley block and no flow), short but dramatic increase in blood flow to organ/tissue.
Due to lack of oxygen and build up of metabolites. Co2, H, Adenosine
ex. tieing string around finger |
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Term
Extrinci Blood flow that is
NONCHOLINERGIC AND NONADRENERGIC |
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Definition
| doesnt release neither norepinephrine or actylcholine but releas other vasodilator ex. NO (nitric oxide). Found mainly in enteric nervous system, GI tract, penis, clitoris. Basis for viagra and cialsis |
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Term
| Sympaththic stimulation of alpha adrnergic causes |
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Definition
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Term
| Epinehrine stimulation of alpha - adrenergic receptors causes |
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Definition
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Term
| Epinephrine stumlation of beta adrenergic receptors causes |
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Definition
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Term
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Definition
| Epineprhine Angiotensin II Vaopressin Atrial natiuretic peptide |
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Term
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Definition
| binds to adrenergic receptors causes vasoconstriction or binds to beta adrenergic receptors (in GI tract and bladder) to cause vasodilation |
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Term
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Definition
| vasoconstriction of arterioles |
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Term
| Atrial natruietic peptide |
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Definition
| vasodilation of arterioles |
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Term
| The binding of which nerotransmitter can lead to both vasoconstriction and vasodilation |
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Definition
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Term
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Definition
| exchange of matierials, nutrients, metabolic end products, cell secretions, thin wall of endothelial cells suported by basal lamina. beds are found near almost every cell in body |
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Term
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Definition
| have very slow velocity of blood flow allows nutrients to exchange effectively |
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Term
| Substances leave capillaries by which 3 mechanisms |
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Definition
1) Diffusion
2) Vesicular transport
3) Bulk flow |
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Term
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Definition
most effective. high to low gradient.
oxygen and glucose enters tissues through capillaries. Co2 and wastes leave through capillaries |
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Term
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Definition
| Communication, transport, protection |
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Term
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Definition
90% water
7% Proteins
3% Minerals |
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Term
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Definition
Na+ and Cl- provide osmotic equilibrium
HCO3- major regulator of H+ in body fluids |
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Term
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Definition
| albumin, globulins, fibrinogen |
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Term
| Which is the most abundant plasma protein |
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Definition
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Term
| Major functions of plasma protein |
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Definition
carriers for hormones, trace metals and drugs.
proteoilysis of prohormones and enzyme precursors
Inhibition of interstitial and plasm proteases
Colloid pressure in plasma
Body protection (Coagulation and Humoral Immunity) |
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Term
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Definition
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Term
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Definition
first deflection
atrial depolarization |
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Term
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Definition
second deflection
ventricular depolarization |
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Term
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Definition
| ventricular repolarization |
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Term
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Definition
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Term
| What are the two stages in systole |
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Definition
1 Isovolumetric ventricular contraction
2 Ventricular ejection |
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Term
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Definition
heart relaxtion
last twice as long |
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Term
| What are the two stages in diastole |
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Definition
1 Isovolumetric ventricular relaxtion
2 Ventricular filling |
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Term
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Definition
systemic
more muscular
pumps blood to the rest of the body |
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Term
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Definition
| pulmonary; 100% of blood goes directly to lungs |
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