Answer to Question 1
Gradual thinning and graying of the hair happens over time to both men and women. However, the rate of these changes can vary considerably from person to person. For men, they do not tend to lose facial hair. They may grow bushy eyebrows and experience hair growth inside the ears. Women's changes are somewhat different. Women are more likely to develop patches of hair on the face and particularly on the chin. Women's changes in hair growth are related to the hormonal changes experienced during the climacteric.
Answer to Question 2
Bone loss begins in the 30s, accelerates (particularly for women) in the 50s, and slows by the 70s. Once this process begins, research indicates that women lose bone mass twice as fast as men. What accounts for this? There seem to be two main factors.
The first is that women have less bone mass than men in young adulthood to begin with. This means that less loss is required for women before the loss begins to cause problems. The second factor is that with menopause comes a decrease in estrogen. This decrease in estrogen speeds up bone loss.
A hair is an array of many α-keratin filaments, made up of the substructures
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