Q- The tracheal tube is originated from which of the following structures?
A- Ductus arteriosus
C- Fourth pharyngeal arch
D- Third pharyngeal arch
Q- Which of the following endocrine disorders is characterized by high blood pressure, sodium and water retention, low potassium level and decreased renin activity?
A- Addison’s disease
C- Primary hyperaldosteronism
D- Secondary hyperaldosteronism
Q- Which of the following is the mechanism of action of digoxin to increase cardiac contractility?
A- Inhibition of K/Ca ATPase
B- Inhibition of Na/Ca ATPase
C- Inhibition of Na/K ATPase
D- Inhibition of phosphodiesterase