Action of Hormones Endocrine glands produce hormones released

  • Slides: 8
Download presentation
Action of Hormones • Endocrine glands produce hormones released into the bloodstream and distributed

Action of Hormones • Endocrine glands produce hormones released into the bloodstream and distributed to body cells. • 2 types of Hormones: – 1. steroid hormones – 2. non-steroid AKA amino acid hormones. Copyright © Mc. Graw-Hill Education The Endocrine System

Steroid Hormones 1. Soluble in lipids 2. Can diffuse through the plasma membrane of

Steroid Hormones 1. Soluble in lipids 2. Can diffuse through the plasma membrane of cells 3. Bind to a receptor in the cell 4. The bound hormone and receptor bind to cell’s DNA Copyright © Mc. Graw-Hill Education The Endocrine System

Amino Acid Hormones 1. Made of amino acids. 2. Bind to receptors found on

Amino Acid Hormones 1. Made of amino acids. 2. Bind to receptors found on the plasma membrane cell (can’t diffuse through the plasma membrane) Copyright © Mc. Graw-Hill Education The Endocrine System

Endocrine Glands and Their Hormones 1. Pituitary gland • Located at base of the

Endocrine Glands and Their Hormones 1. Pituitary gland • Located at base of the brain • Secretes hormones that regulate many body functions • Regulates other endocrine glands Copyright © Mc. Graw-Hill Education The Endocrine System

Endocrine Glands and Their Hormones 2. Thyroid and parathyroid glands • Thyroxine causes higher

Endocrine Glands and Their Hormones 2. Thyroid and parathyroid glands • Thyroxine causes higher rate of metabolism. • Calcitonin is a hormone helps regulate of calcium. • Parathyroid hormone increases blood calcium levels Copyright © Mc. Graw-Hill Education The Endocrine System

Endocrine Glands and Their Hormones 3. Pancreas • Crucial - produces enzymes that digest

Endocrine Glands and Their Hormones 3. Pancreas • Crucial - produces enzymes that digest carbohydrates, proteins, and fats • Secretes the hormones insulin and glucagon - work together to maintain homeostasis Copyright © Mc. Graw-Hill Education The Endocrine System

4. Adrenal glands • Located just above kidneys • Makes the steroid hormone aldosterone

4. Adrenal glands • Located just above kidneys • Makes the steroid hormone aldosterone • Makes hormones called glucocorticoids • Aldosterone affects the kidneys; important for reabsorbing sodium. • Cortisol raises blood glucose levels + reduces inflammation. Tim Fuller Copyright © Mc. Graw-Hill Education The Endocrine System

Link to the Nervous System 5. Hypothalamus • Produces two hormones: oxytocin + antidiuretic

Link to the Nervous System 5. Hypothalamus • Produces two hormones: oxytocin + antidiuretic hormone. • The antidiuretic hormone (ADH) maintains homeostasis by regulating water balance. Copyright © Mc. Graw-Hill Education The Endocrine System