Which process primarily causes increased blood pressure after administration of vasoconstrictors?

💡 Explanation

In vasoconstriction, vessels narrow systemically raising resistance. Because blood volume and cardiac output are constant, blood pressure rises due to Ohm's Law. Therefore increased systemic vascular resistance is why vasoconstrictors elevate pressure rather than vasodilation and decreased resistance.

• Why does persistent hyperthyroidism increase the risk of osteoporosis in older adults?
• A patient exhibiting hyperoxaluria is prescribed potassium citrate. If the concentration of citrate in the renal filtrate increases, which consequence follows?
• A patient's skin graft fails to vascularize, leading to necrosis. Which mechanism explains why skin grafting outcome requires functional angiogenesis?
• Why does neuronal function decline during neurodegenerative diseases featuring protein aggregates like amyloid plaques or Lewy bodies?
• Which outcome occurs when prolonged digital device use inhibits Meissner corpuscle signaling?
• If a hiker experiences heatstroke, developing a core body temperature of 106°F (41.1°C) despite sweating profusely and drinking water, which mechanism most likely explains the breakdown of thermoregulation?