The contraction or relaxation of the erector pili muscle determines the orientation of hair on the skin. When it contracts, due to fear or cold, hair stands upright.
This is a tiny muscle that attaches to the base of a hair follicle mammals at one end and to dermal tissue on the other end.
The Sympathetic Nervous System, which originates from T1-L2 in the lateral horn. It's what is responsible for your Fight or Flight reflex. Yawning
The arrector pili is the muscle of the hair follicle. They are responsible for connecting the root or bulb of the hair to the hair follicle.
contraction of the arrector pili muscle results from what
^...No. When Arrector Pili Muscles contract you get goosebumps.
''goose bumps'' are formed
adrenaline! which is a stress hormone
smooth muscle
arrector pili
arrector pili.
arrector pili
The Arrector Pili muscle
The arrector pili muscles makes the hairs on your arm stand on end.
Arrector pili is the muscle the raises hair. This is taught in health class.
arrector pili muscle
Arrector Pili Muscle
arrector pili muscle cell
The arrector pili and epidermis are related only in that the action of the arrector pili causes "goosebumps" to form at the epidermis.
Arrector Pili Muscle
it is located underneath the sebacecus gland :)