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Fluids and Electrolytes









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Uploaded on
March 22, 2025
Number of pages
2
Written in
2024/2025
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Class notes
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Heart: Electrolytes regulate cardiac rhythm and contractility.

Potassium: Maintains the resting membrane potential of cardiac cells.

Calcium: Supports the strength and duration of cardiac muscle contractions.

Sodium: Aids in electrical signal propagation for heartbeats.

Imbalances: Low or high potassium levels can cause arrhythmias. Calcium imbalances can lead
to weak or overactive contractions.

Muscles: Electrolytes are essential for muscle contraction and relaxation.

Calcium: Triggers muscle contraction.

Potassium: Facilitates repolarization of muscle cells.

Sodium: Initiates the action potential for contraction.

Magnesium: Helps muscle fibers relax after contraction.

Imbalances: Electrolyte deficiencies can cause muscle cramps, spasms, or weakness.


Nervous System (Brain and Nerves): Electrolytes regulate nerve impulse transmission and
communication between neurons.

Sodium and Potassium: Essential for generating and propagating action potentials.

Calcium: Plays a role in neurotransmitter release at synapses.

Magnesium: Acts as a cofactor for nerve function and prevents overexcitation.

Imbalances: Can lead to confusion, seizures, or nerve dysfunction.
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