plural supplies. Learner's definition of SUPPLY. 1. : the amount of something that is available to be used. [count] the nation's food/oil supply. adequate/sufficient supplies of fresh water. He bought a month's supply of cigarettes.
APPENDICULAR-posterior leg muscle; QUADriceps femoris; knee extension, flex thigh vastus lateralis APPENDICULAR-posterior leg muscle; QUADriceps femoris; knee extension
The arrectores pilorum (singular arrector pili) are small muscles attached to hair follicles in mammals. Contraction of these muscles causes the hairs to stand on end [1] - known colloquially as goose bumps. Each arrector pili is composed of a bundle of smooth muscle fibres which attach to several follicles (a follicular unit), and is innervated by the sympathetic branch of the autonomic nervous system. The contraction of the muscle is therefore involuntary - stresses such as cold, fear etc. may stimulate the sympathetic nervous system and thus cause contraction, but the muscle is not under conscious control.