The structural classification system groups joints into three types: synovial, cartilaginous, and fibrous joints, while the functional, or degree of movement, classification system groups joints into diarthrosis, synarthrosis, and amphiarthrosis type joints. Synovial Joints
In summary, thapsigargin treatment markedly attenuates juxtamedullary afferent arteriolar vasoconstrictor responses to Ang II or NE. In addition, depletion of intracellular calcium pools with thapsigargin completely abolishes the response of juxtamedullary efferent arterioles to these vasoconstrictor agents.hese studies were conducted to determine the role of calcium release from the thapsigargin-sensitive intracellular calcium pool on the Ang II-and NE-mediated vasoconstriction of juxtamedullary afferent and efferent arterioles.
The capillary vascular supply consists of two distinct capillary beds, the glomerulus and the peritubular capillary bed. Vessels leading to and from the glomerulus, the first capillary bed, are both arterioles: the afferent arteriole feeds the bed while the efferent arteriole drains it.The glomerular capillary bed has no parallel elsewhere in the body. It is a high-pressure bed along its entire length.ts high pressure is a result of two major factors: (1) the bed is fed and drained by arterioles (arterioles are high-resistance vessels as opposed to venules, which are low-resistance vessels), and (2) the afferent feeder arteriole is larger in diameter than the efferent arteriole draining the bed.