问题 问答题 简答题

简述影响血压的因素?

答案

参考答案:

影响血压的因素有:

(1)心排血量:包括血容量、心功能的作用。血容量不足或心功能低下,使心排血量下降,血压下降。

(2)不同原因所致的心排血量变化,对动脉压的影响也有差别。每搏量影响脉压,主要是收缩压的变化。

(3)外周阻力,对舒张压的影响大于收缩压,外周阻力增加,血压升高。

(4)主动脉弹性,主要影响脉压。

单项选择题
阅读理解

 Lack of parent willpower may contribute more to juvenile obesity than under-exercising or overeating.

Research suggests that having overweight parents is a big, influence ( 影响) upon a child' s weight, with one study finding that child ren with overweight parents were four times more likely to be overweight themselves.

The findings add heat to an already fierce political debate(争论)over childhood obesity. The Prime Minister, John Howard, last week decided that $116 million be Used for programs to deal with obesity, while the Opposition Leader, Mark Latham, recently announced that his party would move to protect children from unhealthy food advertisements

Clare Collins a senior lecturer at the University of Newcastle, believes such programs will definitely fail unless they influence the way of life of whole families. "If we can' t get parents to take action against their own weight problems, then we can' t expect to influence their kids," she said.

However, Professor, Louise Baur from the Children’ s Hospital at Westmead, doubts whether adult education programs offer any solution to weight problems. "Many parents know they need to lose weight and they know it influences their kids, but they lack the willpower to do anything about it.

The 10-year study of 150 American children found two-thirds of children with overweight parents became overweight. Only one in six children whose parents were of average weight became overweight.  

The president of the Australasian Society for the .Study of Obesity, Associate Professor Gary Wittert, said parents needed help in doing their job and the Opposition Party’s policy(政策) might be on the right track.

"We know that driving without a seat belt is unsafe, so we make law against it,” he said."Obesity is a major public health concern, so why shouldn’t we change the law regarding unhealthy food ads?"

1. What does the underlined phrase “juvenile obesity” mean?

A. Adult education.     B. Childhood overweight

C. Parents’ influence    D. Growing pains

2. What is TRUE about the programs supported by the Prime Minister?

A. Debates on them will become less fierce.

B. They will be effective in dealing with obesity.

C. A large sum of money will be spent on them.

D. They will influence people' s way of life.

3.Both Collins and Baur believe that overweight parents_______,

A. will come up with .better solutions

B. will help with their children' s education

C. should be more active in reducing weight

D. should carry out at least 10 years' study

4. According to some experts, the Opposition Party's policy________.

A. can help fight against unemployment

B. may protect kids from unhealthy food ads

C. should be brought back to the right track

D. will work well to prevent traffic accidents