A pilot in Sukhoi aircraft is experiencing negative G. Which of the following physiological events will manifest in such situation?
In negative gravity, the blood will no longer be held onto lower limbs. So lower limb venous pressure decrease and the venous return increases. This will cause the cardiac output to increase. Since no gravity, blood rushes to the head, and cause increased cerebral arterial pressure and red outs (mental confusion).
The hydrostatic pressure in veins of lower limb increases
The cardiac output decreases
Black out occurs
The cerebral arterial pressure rises