What is the order of recruitment of muscle fibers when you lift something heavy?

Increases in maximal stroke volume is due to? 

All of the following changes occur with aging during systolic function except?

Endothelial function improves with exercise training due to what mechanism?

Which of the following lung volume measures increases with aging?

In the absence of disease aging results in structural changes to the heart that lowers the threshold for all the following conditions except?

Somatopause is associated with changes in which hormone? 

All the following affect the endocrine system along with aging except?

Which of the following hormones or precursors increase in men during the aging process?

Estrogen activates pathways that phosphorylate the myosin regulatory light chain effectively moving the myosin head closer to the actin molecule. This is one of the mechanisms that cause women to lose strength when they go through menopause.