Which thermoregulation mechanisms can an animal use when it is too warm or too cool?
O increase muscular activity to cool down or decrease muscular activity to warm up
O bask in direct sunlight to cool down or seek shade in a breezy spot to warm up
O raise fur or feathers to cool down or lower fur or feathers to warm up
O vasodilate superficial blood vessels to cool down or vasoconstrict to warm up