下图表示某人在休息时,单位时间内流经其单位面积皮肤血管内血液

下图表示某人在休息时,单位时间内流经其单位面积皮肤血管内血液的相对流量,在时刻A,室内温度由15℃突升至45℃,在时刻B,室内温度又突降至15℃,下列说法正确的是(    )

A.在AC时间段内机体通过大脑皮层发送的信息 调节皮肤血流量从而维持了体温恒定

B.在BC时间段内机体的耗氧量有所增加

C.在AB时间段内皮肤血流量增加的目的是为细 胞提供更多的营养物质来适应炎热环境

D.在BC时间段内皮肤血流量减少的目的是保证机体的产热量大于散热量来适应寒冷环境

答案

B

相关题目

铝镁合金已成为飞机制造、化工生产等行业的重要材料。研
铝镁合金已成为飞机制造、化工生产等行业的重要材料。研究性学习小组的同学,为测定某含镁3%-5%的铝镁合金(不含其它元素)中镁的质量分数,
1985年科学家发现一种新物质,化学式为C60,下列说法中正确
1985年科学家发现一种新物质,化学式为C60,下列说法中正确的是(    ) A.该物质是混合物                B.该物质为新型化合物 C.该物质的相
 
 
Most dog owners believe their dogs experience guilt,but animal behaviorists say
Most dog owners believe their dogs experience guilt,but animal behaviorists say the “guilty look” of a dog is simply a reaction to you and that dogs lack the ability to feel shame. Alexandra Hor
He demanded that the laboratory report ___ immediately after the experiment was
He demanded that the laboratory report ___ immediately after the experiment was done. A. was written            B. be written          C. must be written       D. would be writt
沉舟侧畔千帆过,                          。
沉舟侧畔千帆过,                          。
 --- Have you got the news about Jack? I haven’t seen him for many years.  
 --- Have you got the news about Jack? I haven’t seen him for many years.  --- He _____ in a company for two years. Now he is a teacher. A. worked      B. has worked      C. had work
材料一  在社会主义现代化建设的进程中,涌现出许多令人
材料一  在社会主义现代化建设的进程中,涌现出许多令人心灵震撼的英雄模范。为进一步弘扬正气和时代主旋律,中央电视台倾力打造了被誉为“中

最新题目