Question

you take part in the annual coney island polar bear plunge and jump into frigid ocean water. the blood vessels in your skin vasoconstrict and systemic vascular resistance increases. as a result, your map increases from 93 mmhg to 120 mmhg. describe in a few sentences the two types of autoregulatory mechanisms that will maintain your gfr at normal levels (180 l/day)

Answer 1

The Coney Island Polar Bear Plunge activates two autoregulatory mechanisms to maintain the glomerular filtration rate (GFR). The myogenic mechanism constricts the afferent arterioles when blood pressure increases, while the tubuloglomerular feedback mechanism monitors sodium chloride concentration and signals for vasoconstriction if it's high.

Step-by-step explanation:

There are two types of autoregulatory mechanisms that help maintain the glomerular filtration rate (GFR) at normal levels during the Coney Island Polar Bear Plunge. The first mechanism is the myogenic mechanism. When blood pressure increases, the afferent arterioles leading to the glomerulus constrict, which helps maintain a constant GFR. The second mechanism is the tubuloglomerular feedback mechanism. This mechanism involves the juxtaglomerular apparatus, which monitors the concentration of sodium chloride in the distal tubule. If the sodium chloride concentration is high, it signals for vasoconstriction of the afferent arterioles, reducing the GFR to normal levels.