Secrete hormones directly into the blood stream Specific effects on specific organs Delay between release of hormones and it's arrival at target cells.
What is hormonal control adequate for??
Digestion, Salt and Water Balance, Metabolism, Growth
4 Characteristics of Hormones
Steroids, proteins or amines (amino acid derivatives) Active in small amounts Most under negative feedback control Rapidly degraded in the liver (enzymes in blood break down amines)
What are male sex hormones also known as?
Where are male sex hormones produced?
What is the principal Androgen?
What is the main function of Testosterone?
Name a few secondary sex characteristics of the male hormones
Growth of the larynx Deepening of the voice Growth of the beard & public hair Development of larger & stronger muscles Stimulation of sweat glands to produce fatty acids may cause sebaceous glands in the skin to become overactive... acne
What are female sex hormones also known as?
Where is the female hormone produced?
What does Estrogen Stimulate??
Breast development, external genitalia
The distribution of body fat
How is the menstrual cycle produced?
Estrogens, progesterone, FSH (follicle stimulating hormone), & LH (luteinizing hormone) all interact to produce the menstrual cycle
What does the menstrual cycle do?
egg maturation and release
Where is the adrenal cortex
Outer region of the adrenal gland (a double gland)
What does the Adrenal Cortex do?
Secretes 2 major groups of adrenal steroids: glucocorticords and mineralocorticoids
It also secrets male sex hormones
What do glucocorticolids do?
helps maintain the glucose level in the blood suppress inflammatory responses to tissues injury or infection
How do glucocorticolids maintain glucose levels in the blood?
Promotes the conversion of proteins & fats to glucose
Explain what cortisol does
suppresses inflammatory responses to tissue injury and infection the drug is used in anti inflammatory agents in treatment of arthritis, asthma and other chronic inflammatory disorders
What do mineralocorticoids do?
Promote Na+ reabsorption (by the Kidney) helps control the body's salt and water balance
stimulates the cells in the kidney to reabsorb Na+ and H20