Which one of the following situations is not associated with the dysfunction of excitation-contraction coupling in myocardium?
A: Acidosis
B: The obstruction of L-type calcium channels
C: The increased activity of myosin ATPase in myocardium
D: The increased foetus troponin
E: The decreased activity of sarco-endoplasmic reticulum calcium-ATPase
A: Acidosis
B: The obstruction of L-type calcium channels
C: The increased activity of myosin ATPase in myocardium
D: The increased foetus troponin
E: The decreased activity of sarco-endoplasmic reticulum calcium-ATPase
举一反三
- In a patient given a cardiac glycoside, which of the followings is/are important effects of the drug on the heart? A: Decreased atrioventricular conduction velocity B: Increased intracellular calcium C: Increased ectopic automaticity D: Increased force of contraction
- Which of the following can combine with calcium? A: troponin B: myosin C: tropomyosin D: actin
- Which one is the main mechanism of inflammatory edema? ( ) A: Decreased plasma colloid osmotic pressure B: Increased capillary permeability C: Lymphatic obstruction D: Increased ANP E: Decreased GFR
- Which<br/>of the followings is the main mechanism of decreased myocardial<br/>contractility induced by acidosis, hyperkalemia?() A: myocardial<br/>energy generation disorder B: myocardial<br/>energy utilization disorder C: myocardial<br/>energy storage disorder D: disorder<br/>of excitation-contraction coupling E: contractive<br/>proteins destruction of myocardium
- Paratfollicular cells or C cells of thyroid also secrete calcitonin, which has the function of ( ). A: Enhancing osteoblast activity B: Promoting the conversion of bone calcium into blood calcium C: Promoting calcification of bone tissue D: Reducing blood calcium E: Elevating blood calcium