<span>Hi,
Sleep apnea </span>is a condition characterized by periods of breathing cessation that occur during sleep.
The answer is C. Blood flows through the contraction of smooth muscle (which resides in the endothelium of blood vessels), and lymph flows through the contraction of skeletal muscle.
Exercise needs vary on individuals for many reasons. First of all, it could be physical problems like weight. If a person is to heavy, or to small. Then starting out exercise slow is best. Often times over exercising for obese people, or people who are to thin, can cause blackouts, a loss of water retention, and exhaustion.
Another could be health issues. People with certain health issue may find it hard to work out, and need help with finding what works best for them.
If fats were characters, these would be the "good guys" who lower cholesterol levels reduce and reduce your risk of heart disease: D) unsaturated fat.
