logo - 刷刷题
下载APP
【多选题】

The excitation cycle of the myocardium includes( )

A.
Absolute refractory period
B.
Relative refractory period
C.
Effective refractory period
D.
Subnormal period
E.
Supernormal period
举报
参考答案:
参考解析:
.
刷刷题刷刷变学霸
举一反三

【单选题】What is the staining reagent in the experiment?( )

A.
Coomassie brilliant blue
B.
Sultan red dye
C.
Ponceau
D.
Sultan black dye

【多选题】The causes of decreasing urine output during dehydration are( )

A.
Decreased renal blood flow
B.
Increased solute concentration in renal tubules
C.
Increased secretion of vasopressin
D.
Reduction of volume receptors by stimulation
E.
Elevated osmotic pressure of plasma crystal

【多选题】The mechanisms of tumor suppressor gene inactivation include( )

A.
hypermethylation
B.
Mutation
C.
Loss of heterozygosity
D.
Obtaining new promoter or enhancer

【单选题】In the regulation of lac operon, when the medium contains both glucose and lactose, which statement is true?( )

A.
repressor is active; CAP is inactive
B.
both repressor and CAP are active
C.
repressor is inactive; CAP is active
D.
both repressor and CAP are inactive

【多选题】Which are right about molecular hybridization?( )

A.
The hybrid molecules must be single
B.
Hybrid molecules must be completely base pairing
C.
Can only hybridization between DNA and RNA
D.
From the understanding of DNA denaturation and renaturation phenomenon

【多选题】The physiological characteristics of myocardium include( )

A.
Conductivity
B.
Autorhythmicity
C.
Contractility
D.
Excitability
E.
Extension