ch 15 & 16

What glands lie closeto the hair follicles, into which they usually drain

A part of the hair that extends above the skin's surface

Epidermis is the layer on top of muscle

what synthesizes and transports protiens?

The role of the nerve endsings is to register sound and pain

Excessive hair loss

the ability of cells to breakdown, disintegrate or tear substances into simpler substances is called what?

meiosis is a complicated process where cells divide into two parts to reproduce

99% of the body is made up of seven elements which one is not?

Patches of melanin clustered together on the skin

what facilitates chemical reactions?

Melanin is either lost or migrates and clusters in the epidermal layer

the number of protons plus neutrons determines the approximate what of an element?

protons are the smallest part of an element.

catabolism is the building up ,assimilation or conversion of ingested substances.

Calcitrol plays a role in absorbing calcium from the body's gastrointestinal tract

which one is a type of matter?

A skin condition in which the melanocytes stop making melanin, causing distinct, localized areas of white

People and animals give off infrared heat rays through radiation

what is the science that investigates the formation, structure and function of cells?