Polar bears are in danger of extinction in the future if globalwarming continues, as their habitat, Arctic sea ice, is shrinkingevery year, making it difficult for bears to have enough food tolast through the lengthening summers.With a population of nearly 25,000, the polar bear is not in dangerof extinction now.
1 In general, anything that is good for your heart is great for your brain. 2  Aerobic exercise is great for body and brain: not only does it improve brain function, but it also acts as a first aid kit on damaged brain cells.
Metabolism is the most basic job your body must complete in order to survive and function. How your metabolism works depends on the type of exercise you're doing at the time. There are two types of exercise, aerobic and anaerobic.Aerobic exercise, such as jogging, depends on oxygen to produce energy, while anaerobic exercise can be performed in the absence of oxygen -- picture a biceps curl. Both types of exercise require energy but use different routes to get it.etabolism is the most basic job your body must complete in order to survive and function. How your metabolism works depends on the type of exercise you're doing at the time. There are two types of exercise, aerobic and anaerobic.