ch 19- blood vessels

• Site that is the major determinant of peripheral resistance?

  Arterioles
• Mainly involved in conducting blood from the heart to the other vessels?

  elastic arteries
• Site where the blood flow is greatest?

  large veins
• Site where the velocity of blood flow is slowest?

  capillaries
• Site where exchanges of food and gasses are made?

  capillaries
• Also known as the distributing arteries?

  muscular arteries
• Site where resistance to blood flow is greatest?

  arterioles
• Site where blood pressure is lowest?

  large veins
• what is not a capillary?

  distributing
• if you had a blood pressure of 120/80mmHg what is your systolic pressure?

  120mmHg
• what is the following capillary

  A) continuous capillary

  
• what is the following capillary

  A) fenestrated capillary

  
• what is the following capillary

  A) sinusoid capillary

  
• what capillary is found in endocrine organs that allows hormones to gain rapid entry into the blood?

  fenestrated capillary
• what capillary has intercellular clefts found in the skin and muscles?

  sinusoid capillary
• what capillary has a discontinuous, incomplete basement membrane?

  sinusoid capillary
• what capillary is found where active capillary absorption of filtrate occurs?

  fenestrated capillary
• Results from heart inability to sustain adequate circulation due to myocardial damage is also known as cardiogenic shock
• circulatory shock is due to inadequate blood flow to meet tissue needs
• Normal blood volume but poor circulation due to extreme vasodilation is vascular shock
• hypovolemic shock is due to large-scale blood loss
• true or false, the adjustment of blood flow to each tissue in proportion to its requirements at any point in time is termed autoregeneration?

  true
• true, or false arterial pressure in the pulmonary circulation is much higher than in systemic circulation because of its proximity to the heart?

  false
• true or false, osmotic pressure is created by the presence in a fluid of small diffusible molecules that easily move through the capillary membrane?

  false
• true or false, the carotid sinus reflex protects the blood supply to the brain, whereas the aortic reflex is more concerned with maintaining adequate blood pressure in the systemic circuit as a whole?

  true
• true or false, the cerebral arterial circle (circle of willis) is an arterial anastomosis?

  true
• true or false, the pulmonary circulation does not directly serve the metabolic needs of body tissues?

  true
• true or false, an obstruction in the superior vena cava would decrease blood flow from the head and neck to the heart?

  true
• true or false, arteries supplying the same territory are often merged with one another, forming arterial anastomoses?

  true
• true or false, an increase in blood viscosity will cause an increase in peripheral resistance?

  true
• true or false, whereas diffusion is more important for solute exchange between plasma and interstitial fluid, bulk flow is more important for regulation of the relative volumes of blood and interstitial fluid?

  true
• reduction in the concentration of albumin in blood plasma would alter capillary exchange by decreasing colloid osmotic pressure and edema will occur
• if a person were to have substantial blood loss you would expect to see all of the following physiological events to except one?

  decreased heart rate
• during a marathon which of the following hormones is least likely to be released by the runner?

  atrial natriuretic peptide (ANP)
• if a person stands up suddenly from the prone (lying) position they may feel a sudden dizzy or lightheadedness. Which of the following is the least likely physiological response to this situation?

  increased parasympathetic nerve impulsed to the heart