7、The key step in mechanisms of fever is( )

A. 　Sodium loss>water loss,serum [Na+]<135mmol/L, plasma osmotic pressure<290mmol/L

B. 　Water loss>sodium loss, serum [Na+]>135mmolL, plasma osmotic pressure>290mmol/L、

C. 　Sodium loss>water loss, serum[Na+]>135mmol/L, plasma osmotic pressure> 290mmol/L

D. 　Water loss>sodium loss, serum [Na+]<135mmol/L, plasma osmotic pressure<290mmol/L

E. 　Sodium loss=water loss, both the serum [Na+] and plasma osmotic pressure are normal

A. 　 primary hypertension

B. 　 aortic valves incompetence

C. 　 aortic valves stenosis

D. 　 pulmonary hypertension

E. 　 mitral stenosis

A. 　Peaked T wave

B. 　Prolonged P-R interval

C. 　Deepened s wave

D. 　Peaked P wave

E. 　Suppressive and widened QRS complex

A. 　L·

B. 　Cl·

C. 　CH3·

D. 　H2O2

E. 　OH·

A. 　It activates PC

B. 　It inhibits factor Va

C. 　It activates plasminogen

D. 　It catalyzes thrombin

E. 　It enhances the activity of AT-III

A. 　PaCO2/CO2CP

B. 　PaCO2/HCO3—

C. 　H2CO3/PaCO2

D. 　HCO —/CO2CP

E. 　HCO3-/H2CO3

A. 　the increase of heat production and decrease of heat loss

B. 　the balance between heat production and heat loss

C. 　the decrease of heat production and increase of heat loss

D. 　the increase of heat production and heat loss

E. 　the decrease of heat production and heat loss

A. 　 Increase of heart rate

B. 　 Expansion of the heart

C. 　 Blood flow redistribution

D. 　 Myocardial hypertrophy

E. 　 activation of the sympathetic nervous system

A. 　Decreased K+

B. 　Decreased Na+

C. 　Decreased Ca +

D. 　Decreased Mg2+

E. 　Increased Ca2+

A. 　that pyrogenic activators stimulate certain cells of human body

B. 　that certain cells of human body produce EPs

C. 　that EPs up-regulate the set-point of thermoregulatory center

D. 　that body temperature is elevated to the new set point

E. 　that EPs down-regulate the set point of thermoregulatory center