can keep you alert and sharpen your concentration. A.
Stress response
B.
Exhaustion
C.
Resistance
D.
None of the above

In multiple sclerosis, the immune system destroys the substance that coats and protects nerve fibers in the brain and spinal cord. this causes inflammation and injury to the nerves, and the axons don't conduct impulses as well.

True or false. mucous membranes secrete mucus that traps pathogens.

Sweat glands that cause orders during puberty are present in the body from the time of brith