2022-10-28T22:23:28+03:00[Europe/Moscow] en true <p>Heart</p>, <p>Blood</p>, <p>capillaries</p>, <p>Lumen</p>, <p>tunica interna (intima)</p>, <p>Tunica media</p>, <p>Tunica externa </p>, <p>tunica media</p>, <p>Conducting arteries </p>, <p>Muscular arteries (distributing)</p>, <p>Conducting arteries</p>, <p>muscular</p>, <p>Arterioles</p>, <p>Continuous </p>, <p>Fenestrated </p>, <p>Sinusoidal</p>, <p>vasomotor nerves, local chemical conditions, bypass, flood</p>, <p>Precapillary sphincter</p>, <p>venules</p>, <p>2; smooth muscle</p>, <p>veins</p>, <p>large-diameter lumens(offer little resistance to flow); valves (prevent backflow of blood)</p>, <p>Systolic</p>, <p>Diastolic</p>, <p>arterioles</p>, <p>aorta</p>, <p>Q= change in pressure/ resistance</p>, <p>direct, change</p>, <p>inverse, flow</p>, <p>Low MAP</p>, <p>High MAP</p>, <p>direct, flow</p>, <p>inverse, flow</p>, <p>elasticity, transmural pressure</p>, <p>elasticity/ distending pressure</p>, <p>transmural pressure</p>, <p>decrease</p>, <p>increase</p> flashcards
Ch. 15 - Blood Flow and the Control of BP

Ch. 15 - Blood Flow and the Control of BP

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  • Heart

    -serves as pump that establishes the pressure gradient needed for blood to flow to tissues.

  • Blood

    -transport medium within which materials being transported are dissolved or suspended.

  • capillaries

    -connect tissue cells and directly serve cellular needs

  • Lumen

    - the central blood-containing space surrounded by tunics

  • tunica interna (intima)

    -endothelial layer that lines the lumen of all vessels

  • Tunica media

    -smooth muscle and elastic fiber layer, regulated by sympathetic nervous system

  • Tunica externa

    -collage fibers that protect and reinforce vessels

  • tunica media

    Which tunic controls vasoconstriction & vasodilation of all the vessels?

  • Conducting arteries

    -thick-walled arteries near the heart; aorta and its major branches

  • Muscular arteries (distributing)

    -below elastic arteries; delivers blood to body organs

    -thick tunica media with more smooth muscle and less elastic tissue

  • Conducting arteries

    _____________ can withstand & smooth out large blood pressure fluctuations allowing blood to flow fairly continuously through body.

  • muscular

    The _________ arteries are active in vasoconstriction

  • Arterioles

    ___________ control flow into capillary beds via vasodilation and constriction.

  • Continuous

    _______ capillaries consist of skin and muscle; junctions between cells are not complete leaving areas for transport of fluid and small molecules.

  • Fenestrated

    __________ capillaries are found in kidney, endocrine and intestine; similar to continuous but pores (fenestrations) allow passage of small molecules

  • Sinusoidal

    _________ capillaries are found in bone; most porous with fewer tight junctions to allow passage of larger molecules.

  • vasomotor nerves, local chemical conditions, bypass, flood

    Blood flow is regulated by __________ & _________, so it can either _________ or ________ the capillary bed.

  • Precapillary sphincter

    -cuff of smooth muscle that surrounds each true capillary

    -regulates blood flow into the capillary

  • venules

    _______ are formed when capillary beds unite

  • 2; smooth muscle

    Large venules are composed of ______ layers of _________.

  • veins

    -are formed when venules converge.

  • large-diameter lumens(offer little resistance to flow); valves (prevent backflow of blood)

    What are the special adaptations of veins?

  • Systolic

    ________ results from blood forced into the arteries during ventricular systole.

  • Diastolic

    _________ is the pressure in the arteries during ventricular diastole.

  • arterioles

    Where does the steepest change in blood pressure occur?

    -capillaries

    -veins

    -arterioles

    -venules

  • aorta

    Where is systemic pressure the highest?

  • Q= change in pressure/ resistance

    Formula for law of Bulk Flow?

  • direct, change

    For every increase or decrease in MAP(pressure change) there is a ______ change in ________.

  • inverse, flow

    For every increase or decrease in resistance, there is a ________ change in ______.

  • Low MAP

    hypotension

  • High MAP

    hypertension

  • direct, flow

    For every increase or decrease in tube radius there is a ________ change in _______.

  • inverse, flow

    For every increase or decrease in tube length or viscocity there is a ________ change in _________.

  • elasticity, transmural pressure

    What are the other factors that determine blood pressure?

  • elasticity/ distending pressure

    inward pressure

  • transmural pressure

    outward pressure

  • decrease

    Increase in P will be offset by __________ in R

  • increase

    Decrease in P will be offset by __________ in R