KROK 1 2014 – Question 82 · KROK (Medicine) · Physiology
Experimental stimulation of the sympathetic nerve branches that innervate the heart caused an increase in force of heart contractions because the membrane of typical cardiomyocytes permitted an increase in:
- A. Potassium ion exit
- B. Potassium ion entry
- C. Calcium ion exit
- D. Calcium and potassium ion exit
- E. Calcium ion entry
Hint
Think about which ionic current links the action potential to contraction in the working myocardium and how adrenergic stimulation changes the channels carrying it.
The answer, the explanation and a note on every option are available once you log in. The account is free: topic tests, a mock exam, mistake review and statistics.
More questions on Physiology
- According to the results of glucose tolerance test, the patient has no disorder of carbohydrate tolerance. Despite that, glucose is detected in the…
- In a cat with decerebrate rigidity the muscle tone is to be decreased. This can be achieved by:
- When studying the signs of pulmonary ventilation, reduction of forced expiratory volume has been detected. What is the likely cause of this…
- In the course of an experiment adenohypophysis of an animal has been removed. The resulting atrophy of thyroid gland and adrenal cortex has been…
- During the air and bone conduction tests it was revealed that in the left ear the tones were louder by bone conduction. This might be associated…
- Due to the use of poor-quality measles vaccine for preventive vaccination, a 1-year-old child has developed an autoimmune renal injury. The urine…