In calisthenics, the resistance is ultimately provided by   a springs and elastic bands b gravity c free weights d weight machines

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.

In which way does nicotine cause addiction? by stimulating the brain's pleasure center by increasing blood-sugar levels by decreasing dopamine levels by reducing depression and anxiety

Quick! will get brainliest which service do most community health centers provide? child care meal preparation medical research mental health treatment