Examlex
Why would you expect some white-fronted bee-eaters to fly very far away from their nests to forage when there are food sources nearby? Base your answer on your knowledge of cost-benefit analyses,
T Tubule
Tubular extensions of the plasma membrane in muscle cells that penetrate into the cell's interior, crucial for transmitting the action potential to trigger muscle contraction.
Calcium Ions
Positively charged ions (Ca2+) essential for various cellular processes, including muscle contraction, nerve function, and blood clotting.
Sarcoplasmic Reticulum
The sarcoplasmic reticulum is a specialized type of smooth endoplasmic reticulum in muscle cells, involved in the regulation of calcium ion concentrations.
Papilledema
Swelling of the optic disc due to increased intracranial pressure, which can lead to vision impairment and is often a sign of serious neurological conditions.
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