Final answer:
Clinical manifestations of hypokalemia include decreased insulin secretion, impaired renal function, and decreased neuromuscular excitability, with muscle weakness being a common symptom instead of increased muscle contractility.
Step-by-step explanation:
The clinical manifestations of hypokalemia, which is an abnormally low potassium blood level, include several signs and symptoms. The correct clinical manifestations from your options are:
Decreased insulin secretion: Potassium is essential for insulin secretion. Hypokalemia can therefore lead to decreased insulin release.
Impaired renal function: Potassium plays a crucial role in renal function, and low levels can result in compromised kidney function.
Decreased neuromuscular excitability: Potassium is vital for muscle contraction and nerve function. Low levels can lead to muscle weakness and decreased reflexes.
On the other hand, increased contractility of skeletal muscle is not a manifestation of hypokalemia; instead, muscle weakness is more likely due to the decreased excitation of neuromuscular cells.