### process | secretion | saliva:

Human saliva
* Most human saliva contains substances.
* contains an enzyme called amylase
  - the carbohydrate-digesting enzyme, salivary amylase
* is rich in amylase, and the pancreas also secretes the enzyme.

Saliva testing
* is an accurate and reliable method of measuring body levels of hormones
  - emerging field for drug, alcohol, and DNA testing
* newer, less proven technology.

Sticky saliva
* Most sticky saliva is produced by glands.
* covers the tong during feeding.

Salivary secretion
* Some salivary secretion contains histamine.
* are known to play an important role in the attack of aphids on plant tissue.
* cause a stunting of leaf and stem growth and leaves tend to fold upwards
* is controlled by the autonomic nervous system
  - strictly reflex

### process | secretion:

Sebum
* Most sebums contain chemicals
  - toxic chemicals
* Most sebums have antibacterial properties
* Some sebums are produced by glands
  - sebaceous glands
  - mix with dirt
* acts to protect hair and skin, and can inhibit the growth of microorganisms on the skin.
* are secretion.
* build up common reason behind slow hair growth.
* builds up in the follicle, becomes infected leading to the basic acne pimple.
* comes from the sebaceous glands, which surround the hair follicles.
* helps to keep the keratin-rich epidermis flexible and waterproof
  - prevent evaporation of sweat
* increases the growth of microorganisms on the skin.
* is secretion
* lubricates the skin.
* plays an important role in maintaining a normal flora.
* softens and lubricates the skin, making it more pliable
  - skin and inhibits the growth of some bacteria
* travels up to the hair follicle and then comes out to the skin.

### process | secretion | sebum:

Excess sebum
* can mix with dead skin cells that builds up in the pores.
* is associated with oily skin and acne.

Smegma
* are sebums.
* is probably the most maligned body substance.

Skin secretion
* Most skin secretion has properties
* Some skin secretion causes irritation.
* Some skin secretion reduces fish predation
* have hallucinogenic properties.

Sticky secretion
* Most sticky secretion is produced by glands.
* is produced along the limbs where disease is present

Toxic secretion
* Most toxic secretion is produced by glands.
* Some toxic secretion is produced by cane toads
* Some toxic secretion reduces fish predation

### process | secretion:

Tubular secretion
* Some tubular secretion occurs in proximal tubules
* helps the kidney remove a. some unfiltered wastes.
* is also lower in infants than in adults
  - always an active process
  - another way of getting waste materials into the urine
  - by active transport
  - caused mainly by active transport
  - the transfer of materials from peritubular capillaries to renal tubular lumen
* means the addition of a substance to the filtrate in the tubule lumen.
* requires a good blood supply to the tubules.
* serves the purposes of waste removal and acid-base balance.
* significant mode of renal elimination.
* takes place in the proximal tubule of the nephron.

Vaginal secretion
* Most vaginal secretion simulates positive reaction.
* Some vaginal secretion is always present, but the amount tends to increase during pregnancy.
* are very benign.
* can contain the virus.
* change through out the month.
* maintain a normal, healthy vagina.

Several process
* appear to contribute to sympatric speciation.
* are involved in how the body obtains, transports, and uses oxygen
  - moving materials across the cell membrane
  - involved, the first of which is transcription
* contribute to building up and wearing down the earth's surface
  - changing the Earth s surface
* move carbon from the geosphere to the atmosphere.