When a skeletal muscle cell contracts and the muscle shortens?

Which muscle is responsible for inhalation ?

When analyzing tree rings, what do scientists assume a thin ring indicates?

Matthew decided he wanted to hike up mount everest. on his way to the top, it began to snow and the temperature dropped to -10°f. matthew forgot to wear a heavy jacket so his body began to shiver beyond control. in this case, matthew's body shivering is the to a drop in temperature. * 0 points reflex stimuli responce environmental facto