Which process causes skeletal muscles in endotherms under prolonged cold exposure to begin shivering?

💡 Explanation

When body temperature drops, the hypothalamus triggers shivering, which involves cycles of muscle contraction and relaxation; increased ATP hydrolysis through futile cycling accelerates metabolic rate, but uncoupled from useful mechanical work, converts energy into heat. Therefore uncoupled contraction causes shivering, and not other options relying on separate biochemical pathways.

• Which risk increases for fish larvae in oxygen-depleted water?
• Which outcome occurs when a prolonged drought causes excessive abscisic acid production?
• Which outcome occurs when a cuttlefish encounters monochromatic light?
• Which feedback response decreases transpiration rate when abscisic acid concentration elevates rapidly in xylem sap?
• Which developmental consequence occurs when a Tokay Gecko embryo lacks thyroid hormone receptors during initial development?
• Which outcome increases for predators when pursuing mobile prey in complex terrain?