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27 Cards in this Set

  • Front
  • Back

Function of Hormones (5)

-Control several major processes
-Growth and development
-Reproduction
-Mobilization of body defenses
-Maintenance of homeostasis
-Regulation of metabolism

Tropic hormones(Function)

Target other endocrine glands and stimulate their growth and secretion

Sex hormones(Function)

Target reproductive tissue

Anabolic hormones(Function)

Stimulate anabolism in the body

Hormones are produced by:

Specialized cells which secrete hormones into extracellular fluid

How are hormones transfered?

Bloodstream

How are hormone levels controlled?

Negative feedback

Define: Endocrine

System that consists of glands that secrete hormones into the blood stream

Define: Exocrine

Secratory structure that discharges products into ducts

Describe negative feedback.

A mechanism used to maintain homeostasis in 4 steps

Step 1 (In Negative Feedback)

A stimulus or charge occurs in the body

Step 2 (In Negative Feedback)

The sensor or receptor (sensory neuron) detects change in the body

Step 3 (In Negative Feedback)

The control center (brain) sends out signals and messages to the effector

Step 4 (Negative Feedback)

The effector (muscle or glands) is in charge of restoring the body back to homeostasis

Pineal gland

Secretes melatonin.

Hypothalamus

-Controls processes associated with thirst, hunger, fatigue, cardiac rhythm.
-Controls secretion in anterior pituitary
-Produce messanger hormones

Pituitary Gland

-Master Gland
-Controls hormone functions such as: temperature, thuroud activty and more.


Anterior-Glandular tissue
Posterior-Nervous tissue

Posterior Pituitary Hormones

Oxytocin

Antidiuretic hormone

Oxytocin

-Stimulates contractions of uterus
-Milk let down in the breast ducts

Antidiuretic hormone (ADH)

-Can inhibit production by promoting water retention by kidneys
-Regulated by hypothalamus in response to water and salt imbalance
-In large amounts, causes high blood pressure

Anterior Pituitary Hormones

-Thyroid stimulating hormone (TSH)- promotes and maintains the growth and development of the thyroid gland
-Adrenocorticotopic hormone (ACTH)-promotes and maintains the growth and development of the cortex and adrenal gland
-Follicle-Stimulating hormone (FSH)- stimulate follicles of the ovaries to grow and mature
-Luteinizing hormone (LH)- stimulates the formation and activity of the corpus luteum of the ovary
-Growth hormone (GH)- Stimulates growth of muscles and bones and functions in metabolism. Regulated by hypothalamu
-Prolactin (PL)- after childbirth it stimulates and maintains milk production by the breast

Stimulus low blood level of the thyroid hormone

Hypothalamus increases thyrotropin releasing hormone which will travel the the anterior pituitary gland which will release TSH which goes to the thyroid gland and stimulates the release of thyroxine which results in an increased thyroxine level in the blood stream.

Adrenal Glands

Located above the kidneys (Cortex and medulla) releases hormones that prolongs and enhances the autonomic nervous system.

Ovaries

Located in pelvis and produce hormones that promote female characteristics and pregnancy

Pancreas

Located in the beginning of the small intestine and increases glucose levels

Testes

Paired organs in scrotum.
Growth and male charachteristics

Thyroid

Located in the neck, 2 large lobes.
Controls calcium content.