Which of the following medications serves as a positive treatment by interfering with the removal of calcium ions from the sarcoplasm of cardiac muscle cells?
a. verapamil
b. acetylcholine
c. beta blockers
d. digitalis
Answer: d. digitalis
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The most commonly used classification system for cancer is the ________________________________.?
Fill in the blank(s) with correct word
Explain how the use of biological control to decrease the population of introduced European rabbits in Australia relates to immunology
What will be an ideal response?
The plasma membrane of an excitable cell is more permeable to K+ because
A. there are more leak ion channels for K+ than Na+. B. protein molecules cannot exit through the plasma membrane. C. there are more gated channels for K+. D. of its positive electrical charge. E. calcium ions block Na+ and Cl- channels.
The figure illustrates bones, fontanels, and sutures on the fetal skull. What does "E" represent?
A. anterior fontanel B. posterior fontanel C. parietal bone D. sagittal suture E. occipital bone