QUIZ 11-13-06
Terms
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- FORM A CLOSED CIRCUIT OF TUBES THAT CARRY BLOOD FROM THE HEART TO THE BODY CELLS AND BACK AGAIN
- BLOOD VESSELS
- OUTERMOST LAYER, CONSISTS OF CONNECTIVE TISSUES (ELASTIC AND COLLAGENOUS); APPEAR THIN IN ARTERIES, BUT THICK IN VEINS
- TUNICA EXTERNA OR TUNICA ADVENTITIA
- PART OF TUNICA MEDIA THAT IS ELASTIC WITH SMOOTH MUSCLE; FUNCTION IS DURABILITY
- ARTERIES
- PART OF TUNICA MEDIA THAT'S COLLAGENOUS WITH SMOOTH MUSCLE; MAIN FUNCTION IS SUPPORT
- VEINS
- MIDDLE LAYER OF BLOOD VESSELS, CONSISTIS MAINLY OF SMOOTH MUSCLES AND COLLAGENOUS FIBERS
- TUNICA MEDIA
- INNERMOST LAYER CONSISTING OF SIMPLE SQUAMOUS EPITHELIAL CELLS
- TUNICA INTERNA OR TUNICA INTIMA
- WHAT IS THE FUNCTION OF TUNICA MEDIA?
- REGULATE DIAMETER OF BLOOD VESSELS
- TUNICA INTERNA IS CONTINUOUS TO WHAT?
- ENDOCARDIUM OF HEART
- CENTRAL SPACE OF BLOOD VESSEL
- LUMEN
- ALSO KNOWN AS CONDUCTING ARTERIES
- ELASTIC ARTERIES
- CONTAINS MORE ELASTIC FIBERS THAN ANY OTHER VESSELS...THIS ENABLES IT TO WITHSTAND AND SMOOTH OUT LARGE PRESSURE FLUCTUATION
- ELASTIC ARTERIES OR CONDUCTING ARTERIES
- WHY ARE ELASTIC ARTERIES SOMEETIMES CALLED CONDUCTING ARTERIES?
- BECAUSE THEY CONDUCT BLOOD TO THE MEDIUM SIZED ARTERIES
- ARTERIES THAT DELIVER BLOOD TO THE SKELETAL MUSCLES AND INTERNAL ORGANS
- MUSCULAR, DISTRIBUTING, OR MEDIUM-SIZED ARTERIES
- THE CHANGES IN THEIR DIAMETER AFFECT THE AMOUNT OF FORCE REQUIRED TO PUSH BLOOD AROUND CARDIOVASCULAR SYSTEM
- ARTERIOLES
- WHAT ARE ARTERIOLES SOMETIMES CALLED AND WHY?
- RESISTANCE VESSELS BECAUSE THEIR STRUCTUIRE RESISTS HIGH BLOOD PRESSURE
- MICROSCOPIC VESSELS THAT SUPPLY ALMOST ALL BODY TISSUES; WALLS CONSIST OF ONLY A SINGLE LAYER OF CELLS
- CAPILLARIES
- WHERE NUTRIENTS, HORMONES, GASES, AND WASTES ARE EXCHANGED BETWEEN THE BLOOD AND CELLS
- CAPILLARIES
- SMOOTH MUSCLE-LIKE CELLS THAT STABILIZE CAPILLARY WALL
- PERICYTES
- 3 TYPES OF CAPILLARIES
- CONTINUOUS, FENESTRATED, AND SINUSOIDS OR SINUSOIDAL
- THIS TYPE OF CAPILLARY OCCURS IN ALL TISSUES (SKIN AND MUSCLES), EXCEPT EPITHELIA AND CARTILAGE
- CONTINUOUS
- JUNCTIONS JUST LARGE ENOUGH TO ALLOW PASSAGE OF FLUIDS AND SMALL SOLUTES THROUGH CONTINUOUS CAPILLARIES
- INTERCELLULAR CLEFTS
- BRAIN CAPILLARIES ARE UNIQUE CONTINUOUS CAPILLARIES BECAUSE THEY ARE COMPLETE, AND CONSTITUTE THE STRUCTURAL BASIS OF WHAT?
- BLOOD-BRAIN BARRIER
- CAPILLARIES WITH "WINDOWS", OR PORES, OR FENESTRATIONS COVERED WITH A DELICATE MEMBRANE OF DIAPHRAGM
- FENESTRATED
- WHERE ARE FENESTRATED CAPILLARES FOUND?
- KIDNEYS, INTESTINE, ENDOCRINE GLANDS, CHOROID PLEXUS
- CAPILLARIES FOUND IN AREAS WHERE ABSORPTION AND FILTRATE FORMATION OCCUR
- FENESTRATED
- SPECIALIZED FENESTRATED CAPILLARIES, HIGHLY MODIFIED AND "LEAKY"
- SINUSOIDS OR SINUSOIDAL
- FOUND IN AREAS WHERE LARGE MOLECULES NEED TO PASS
- SINUSOIDS OR SINUSOIDAL
- EXAMPLES OF WHERE SINUSOIDS MAY BE FOUND
- LIVER, BONE MARROW, ADRENAL GLAND
- CAPILLARIES DO NOT FUNCTION AS INDIVIDUAL UNITS, BUT RATHER AS WHAT?
- INTERCONNECTED NETWORK
- CAPILLARY BEDS OR CAPILLARY PLEXUS
- INTERCONNECTED NETWORK
- FLOW OF BLOOD FROM ARTERIOLE TO BENULE THROUGH THE CAPILLARY BEDS
- MICROCIRCULATION
- CONNECTS THE ARTERIOLE AND VENULE AT OPPOSITE ENDS OF THE BEDS
- VASCULAR SHUNTS
- 2 TYPE OF VESSELS THAT CONSTITUTE CAPILLARY BED
- VASCULAR SHUNT AND TRUE CAPILLARIES
- WHERE ACTUAL EXCHANGE OF MATERIALS BETWEEN BLOOD AND CELLS OCCURS
- TRUE CAPILLARIES
- BAND OF SMOOTH MUSCLES THAT GUARD THE ENTRANCE OF EACH CAPILLARY
- PRECAPILLARY SPHINCTER
- MAJOR FUNCTION OF VENOUS SYSTEM
- BLOOD RESERVOIR FOR CAPACITANCE VESSELS
- WHICH HOLDS MORE BLOOD VOLUME, VEINS OR ARTERIES?
- veins
- characterized by large lumen and thin walls
- VEINS
- SMALLEST VEINS; THEY COLLECT BLOOD FROM CAPILLARY BEDS
- VENULES
- COMPARABLE IN SIZE TO MUSCULAR ARTERIES
- MEDIUM-SIZED VEINS
- THICKEST LAYER ON VEINS; CONTAINS ELASTIC AND COLLAGEN FIBERS
- TUNICA EXTERNA
- WHAT CONTROLS THE FLOW O BLOOD TO THE CAPILLARIES?
- ARTERIOLES
- WHAT STRUCTURE FUNCTIONS AS CAPACITATE VESSEL?
- VEINS
- WHAT FUNCTIONS AS A BLOOD RESERVOIR?
- VEINS
- WHERE CHANNELS UNITE
- VASCULAR ANASTOMES
- PROVIDE ALTERNATE PATHWAYS FOR BLOOD TO REACH A GIVEN BODY REGION
- ARTERIAL ANASTOMOSES
- THOROUGHFARE CHANNEL SHUNTS OF CAPILLARY BEDS
- ARTERIOVENOUS ANASTOMOSES
- VEINS THAT ARE MORE COMMON ON BACK OF HAND
- VENOUS ANASTOMOSES
- THE FORCE EXERTED BY THE BLOOD ON THE WALL OF A BLOOD VESSEL
- BLOOD PRESSURE
- HOW IS BLOOD PRESSURE RECORDED?
- mmHG
- 3 AREAS CIRCULATORY PRESSURE IS OFTEN DIVIDED INTO
- BLOOD PRESSURE, CAPILLARY HYDROSTATIC PRESURE, AND VENOUS PRESSURE
- RANGES FROM 100 mmHG TO ABOUT 35 mmHG AT THE START OF CAPILLARY BEDS
- BLOOD PRESSURE
- BLOOD PRESSURE IS ALSO CALLED
- ARTERIAL PRESSURE
- RANGES FROM 35-18mmHG; MEASURES CAPILLARIES
- CAPILLARY HYDROSTATIC PRESSURE
- TYPICALLY QUITE LOW AND RELATIVELY STEADY/ ONLY ABOUT 18 mmHG
- VENOUS PRESSURE
- WHAT 2 FACTORS DOES BLOOD PRESSURE REFLECT
- HW MUCH ELASTIC ARTERIES CAN BE STRETCHED & VOLUME OF BLOD FORCED INTO THEM AT ANY TIME
- THE MORE ELASTICITY AN ARTERY HAS, THE ?
- LOWER BLOOD PRESSURE
- VISCOSITY IS DEFINED AS
- VOLUME OF BLOOD
- RHYTHMIC PRESSURE OSCILLATION THE ACCOMPANIES EACH HEARTBEAT
- PULSE
- DIFFERENCE BETWEEN SYSTOLIC AND DIASTOLIC PRESSURE
- PULSE PRESSURE
- WHEN THE VENTRICLES CONTRACT
- SYSTOLIC PRESSURE
- WHEN VENTRICLES RELAX
- DIASTOLIC PRESSURE
- PRESSURE THAT PROPELS BLOOD TO TISSUES IN CARDIAC CYCLE
- MEAN ARTERIAL PRESSURE (MAP)
- MAP=
- DIASTOLIC PRESSURE + PULSE PRESSURE/3
- BLOOD PRESSURE GREATER THAN 150/90
- HYPERTENSION
- WHAT FACTORS INFLUENCE ARTERIAL BLOOD PRESSURE
- HEART ACTION, BLOOD VOLUME, AND PERIPHERAL RESISTANCE
- CREATES BLOOD'S PRESSURE BY FORCING BLOOD INTO ARTERIES
- HEART ACTION
- EQUALS THE SUM OF BLOOD CELL AND PLASMA VOLUMES IN VASCULAR SYSTEM
- BLOOD VOLUME
- OPPOSITION TO THE FLOW OF BLOOD
- PERIPHERAL RESISTANCE
- A MEASURE OF AMOUNT OF FRICTION BLOD ENCOUNTERS AS IT PASSESTHROUGH THE VESSELS
- RESISTANCE (PERIPHERAL)
- 3 IMPORTANT SOURCES OF RESITANCE
- VISCOSITY, TOTAL BLOOD VESSEL LENGTH, BLOOD VESSEL DIAMETER
- A BIGGER BODY...MEANS LONGER VESSELS...MEANS GREATER RESISTANCE....MEANS?
- HIGHER BLOOD PRESSURE
- MAJOR SOURCE OF VISCOCITY
- RED BLOOD CELLS
- TENDENCY FOR A FLUID TO RESIST FLOW
- VISCOSITY
- SMALLER DIAMETER OF VESSEL MEANS
- GEATER FRICTION
- PROCESSES THAT MOVE MATERIALS ACROSS A TYPICAL CAPILLARY WALL
- CAPILLARY EXCHANGE
- NET MOVEMENT OF IONS OR MOLECULES FROM AN AREA OF HIGHER CONCENTRATION TO AREA OF LOWER CONCENTRATION
- DISFFUSION
- ROUTES OF DIFFUSION IN CAPILLARY WALLS
- between adjacent endothelial cells, channels, pores of fenestrated capillaries, through endothelial membrane, and pores of sinusoids
- diffusion of water due to differing solute concentrations
- osmosis
- what is osmotic pressure indicative of
- the force of osmotic water movement
- FORCE THAT DRAWS WATER INTO A SOLUTION
- OSMOTIC PRESSURE
- TERM FOR OSMOTIC PRESSURE OF THE BLOOD IN WHICH ONLY SUSPENDED PROTEINS ARE UNABLE TO CROSS CAPILLARY WALLS
- BLOOD COLLOID OSMOTIC PRESSURE OR ONCOTIC PRESSURE