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Scientists have shown that exercise is linked to brain changes throughout all stages of life and canhelp the brain develop and stay healthy. Babies, for example , need regular exercise to form connectionsin the brain. In children, research suggests that exercise "improves attention , focus and' schoolperformance. In the elderly, exercise has been shown to help slow memory lossThen how does exercise help the brain? Over the last 20 years, scientists have learned that exercisecan help keep the mind sharp in a number of ways. Exercise improves blood flow to the brain. The bloodcarries oxygen, contributing to more efficient connections between brain cells. Increasing blood flow isone way that exercise can improve mental abilities. The positive effects of exercise on the brain can beseen in babies, pre-teenagers and adults.
Babies are in near-constant movement, which is extremely important for development. Thismovement not only strengthens their muscles, but also helps their brains form connections. The processcontinues throughout life but is most intense in infancy (婴儿期) and toddlerhood (学步期)，whenchildren are mastering brand-new skills like sitting, standing, walking, running and jumping.Exercise is also healthy for pre-teenagers’ brains. In fact, some research suggests that regularexercise can improve school performance. A study found that the effects depended on how much kidsexercised. The more days the children attended the exercise program, the more their focus improved.Finally, exercise helps keep the mind sharp during adulthood. Research suggests exercise canincrease the size of the hippocampus, an important area of the brain, which becomes smaller with age.and can increase levels of a protein (蛋白质) that aids the growth of new brain cells. This can helpprevent older adults from losing mental abilities and memory..
44. How does exercise help the elderly?
A、By improving attention.
B、By slowing memory loss.
C、By connecting with others.
D、By controlling cell growth.

答案是:B

解析：

出自 十大正规可靠体育平台新手怎么玩 > 英语 >  2022年十大正规可靠体育平台新手怎么玩专升本《英语》十大正规可靠体育平台新手怎么玩试卷与答案

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