Which of the following occurs as a result of circulatory shock?

In the scenario of circulatory shock, the body experiences a significant drop in blood flow and oxygen delivery to tissues, leading to several physiological responses. One of the prominent effects of circulatory shock is decreased glomerular filtration rate (GFR). This occurs because the kidneys sense reduced blood flow and pressure and respond by activating several compensatory mechanisms to conserve fluid and maintain blood pressure.

Increased renin secretion is also a key response during circulatory shock. Renin is released from the juxtaglomerular cells of the kidneys and initiates the renin-angiotensin-aldosterone system (RAAS). The activation of this system leads to the generation of angiotensin II, which promotes vasoconstriction and helps to increase blood pressure, as well as stimulating aldosterone secretion, which causes the kidneys to retain sodium and water, further aiding in the restoration of blood volume and pressure.

The combination of decreased GFR and increased renin secretion helps the body to adapt to the decreased perfusion state during circulatory shock, indicating that this answer accurately reflects the pathophysiological changes occurring in this condition.