KROK 1 2018 – Question 161 · KROK (Medicine) · Physiology
Cell membrane rest potential changed from -85 to -90 mV. It can be caused by activation of the following cell membrane channels:
- A. Potassium and calcium
- B. Potassium
- C. Sodium
- D. Calcium
- E. Potassium and sodium
Hint
Compare the direction of the potential shift with the equilibrium potentials of the main ions, and ask which ion flow through open channels would make the inside of the cell more negative.
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
- ECG of the patient shows increased duration of the QRS complex. What is the most likely cause?
- Vascular endothelium is characterized by high metabolic activity and synthesizes vasoactive substances. Among these substances there is a potent…
- A person becomes less receptive to pain in physically or emotionally straining situations due to activation of:
- In human organism significant blood loss leads to decreased blood pressure, tachycardia, and weakness. Eventually the sensation of thirst appears…
- On examination the patient was determined to have a strong, balanced, inert type of higher nervous activity according to Pavlov’s classification…
- After a trauma the patient has developed right-sided paralyses and disturbed pain sensitivity. On the left side no paralyses are observed, but pain…