HBS1HBA Lecture Notes - Lecture 7: Cell Membrane, Skeletal Muscle, Bronchodilator
Document Summary
> made up of endocrine glands and the hormones they secrete. A hormone is a mediator molecule released by endocrine glands to regulate activities in cells in other parts of the body (chemical signals) Help regulate composition and volume of interstitial fluid. Help regulate contraction of smooth and cardiac muscle fibres. > hormones act on tissues distant to their own site of synthesis and release, via passage through the bloodstream. > two types of glands: exocrine & endocrine. Exocrine secrete their products into ducts that carry the secretion into body cavities, into the lumen of an organ or to the outer surface of the body. Includes sudoriferous (sweat), sebaceous (oil), mucous and digestive glands. Endocrine secrete hormones into the interstitial fluid surrounding the secretory cells rather than into ducts. From the interstitial fluid, hormones diffuse into blood capillaries and blood carries them to target cells throughout the body.
