The length of the circadian cycle Group of answer choices depends on the dimerization of Clock with Per. is a product of the time it takes for Per/Cry dimers to degrade. is independent of mutations in Clock. depends on light mediating the release of melanopsin onto SCN neurons.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.

c. is the correct answer