midterm Flashcards
(126 cards)
a stable internal environment
homeostasis
The three purposes of skin
Protection, secretion, and communication
The part of the skin that’s exposed to the environment
Epidermis
The protein that strengthens and hardens cells of skin
Keratin
The pigment responsible for skin color
Melanin
The second layer of skin
dermis
The third layer of skin
Subcutaneous layer
skin is the main organ of what
Integumentary system
The long-term problem from constant exposure to sunrays
Skin cancer
The oil that waterproofs skin and keeps it soft and flexible
sebum
The most dangerous form of skin cancer
Malignant melanoma
The removal of waste substances from the body
Excretion
The most important excretory organ
Kidneys
The process of returning water and important molecules to the blood during filtration
Reabsorption
The liquid waste of the body
Urine
The system that communicates using hormones
Endocrine system
The units kidneys are made of
Nephrons
The enzyme that raises blood pressure
renin
The hormone that controls water reabsorption
ADH
The process in which a machine does the work of a kidney
Dialysis
The chemical messengers of the body
Hormones
what is the master gland?
Pituitary gland
what is the growth hormone?
Somatotropin
what is the hormone that controls metabolism?
Thyroxine