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ch.19 study quest
QUIZ3 JONES
| Question | Answer |
|---|---|
| smooth muscle in blood vessel wall | is mostly circularly arranged |
| Peripheral resistance | is inversely related to the diameter of arterioles |
| what can lead to venous return of blood to the heart? | damage to the venous valves |
| arterial blood pressure increases in response to... | increase stroke volume, heart rate,arteriosclerosis & rising blood volume |
| which of the following wouldnt result in dilation of feeder arterioles & opening of precapillary sphincters in systemic cap beds? | local increase in pH |
| the structure of capillary walls differ from that of a vein or an artery?? | it has a single tunic- only tunica media |
| the baroreceptors in the carotid sinus & aortic arch are sensitive to.... | changes in arterial pressure |
| the myocardium receives its blood supply directly from the... | coronary arteries |
| blood flow in the capillaries is steady despite the rhythmic pumping of the heart because of... | elasticity of the large arteries |
| tracing blood from the heart to the right hand, we find the blood leaves & passes thru aorta, r. subclavian, axillary & brachial | we find the blood leaves & passes thru aorta, r. subclavian, axillary & brachial, thru either radial or ulnar to arrive at hand whats missing?? brachiocephalic trunk |
| which of the following do not drain directly into the IVC?? | DOESNT:INFERIOR MESENTERIC VEIN does; PHRENIC, HEPATIC,RENAL |
| IN ATHEROSCLEROSIS WHICH LAYER IN VESSEL WALL THICKENS FIRST?? | TUNICA INTIMA |
| WHICH HV UNPAIRED BRANCH OF ABDOMINAL AORTA | SUPERIOR MESENTERIC,LEFT COMMON CAROTID,CELIAC TRUNK |
| SECOND BRANCH OF AORTIC ARCH | LEFT COMMON CAROTID |
| BRANCH OF EXTERNAL CAROTID | SUPERFICIAL TEMPORAL |
| BRANCH OF INTERNAL CAROTID | OPTHALMIC |
| ORGIN OF FEMORAL ARTERIES | EXTERNAL ILIAC |
| WHAT BRANCH OF THE AUTONOMIC NERVOUS SYSTEM INNERVATES BLOOD VESSELS? LAYER? | THE SYMPATHETIC NERVOUS SYSTEM, IT INNERVATES TUNICA MEDIA & ARE SMOOTH MUSCLE CELLS |
| WHAT VASCULAR SMOOTH MUSCLE CONTRACTS? WHAT HAPS DIAMETER? NAME? | DIAMETER OF BLOOD VESSELS BECOMES SMALLER & ITS CALLED VASOCONSTICTION |
| MAJOR ROLE IN DAMPENING THE PULSE SITE PRESSURE OF CONTRACTIONS?? | ELASTIC ARTERIES |
| MUSCULAR ARTERIES | HAVE THICKEST TUNICA MEDIA RELATIVE TO CAPILLARY BEDS |
| WHAT IS THE FUNCTION OF VALVES IN VEINS & WHAT FORMS VALVES? | VALVES PREVENT BLOOD FROM FLOWING BACKWARDS IN VEINS & THEY ARE FORMED FOLDS IN TUNICA MEDIA |
| IN SYSTEMIC CIRCUIT WHICH CONTAINS MORE BLOOD ARTERIES OR VEINS OR THE SAME?? | VEINS CONTAIN MORE BLOOD |
| LIST 3 FACTORS THAT DETERMINE RESISTANCE IN A VESSEL? WHICH FACTOR IS PHYSIOLOGICALLY IMPORTANT? | VISCOSITY, VESSEL LENGTH, VESSEL DIAMETER, VESSEL DIAMETER IS PHYSIOLOGICALLY MOST IMPORTANT |
| SUPPOSE VASOCONTRICTION DECREASES DIAMETER OF A VESSEL TO 1/3 ITS SIZE WHAT HAPS TO RATE OF FLOW? | RATE OF FLOW WILL DECREASE 81-FOLD FROM ITS ORIGINAL FLOW (3X3X3X3=81) |
| KIDNEYS PLAY AN IMPORTANT ROLE IN MAINTAINING MAP BY WHAT VARIABLE? ALSO EXPLAIN HOW KIDNEYS AFFECT SECONDARY HPT? | KIDNEYS HELP MAINTAIN MAP BY INFLUENCING BLOOD VOLUME. IN Renal artery obstruction bp in kidney is low than rest body which triggers renal mechanisms to increase bp & blood volume |
| suppose your in a bike race, what happens to the smooth muscle in the arterioles supplying ur leg muscles?? | auto regulation by intrinsic metabolic controls, cause arteriole smooth in ur legs to relax, dilating the vessels & supplying more o2 & nutrients of exercising muscle |
| if many arteriloes in ur body dilate at once u would expect map to plummet. what prevents map from decreasing? | extrinsic mechanisms primarily the sympathetic nervous system,prevent bp from plummeting by constricting arterioles elsewhere. also cardiac output increases also helps maintain map |
| which paired artery supplies most of the tissue of the head except for the brain & orbits? | external carotid artery |
| name the arterial anastomoses at the base of the brain | circle of willis, cerebral arterial circle |
| 4 unpaired arteries that emerge from the abdominal aorta | celiac trunk, inferior & superior mesenteric, median sacral |
| what arteries do u palpate of a diabetic behind knee, dorsal of foot & medial malleolus foot? | popliteal, dorsalis pedis,posterior tibial |
| what important way does area drained by vertebral veins differ from area vertebral arteries? | vertebral arteries help supply the brain, vertebral veins dont supply much blood to brain |
| which veins drain the dural venous sinuses & were do these veins terminate? | Internal jugular veins drain the dural sinuses, each internal jugular vein joins a subclavian vein to form a brachiocephalic vein |
| what is a portal system? whats the function of hepatic portal system, | one capillary bed drains into another function of hepatic: transport venous blood from digestive system to liver for processing b4 enters systemic system |
| name leg veins that most often become varicose | great & small saphenous veins |
| list 3 differences in systemic arteries & veins w/respect to general pathways | 1. arteries run deep while veins run deep & superficial 2. venous pathways are more interconnected than arterial pathways 3.brain & digestive system hv unique venous drainage were arterial much diff than other organs |
| name 3 fetal shunts that hv occluded shortly after birth/ bypassed? | FORAMEN OVALE & DUCTUS ARTERIOSIS BOTH BYPASS LIVER DUCTUS VENOSUS BYPASS LIVER |
| NAME 3 COMMON AGE RELATED VASCULAR PROBLEMS | VERICIOSE VEINS, ATHEROSCLEROSIS, HYPERTENSION |
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