BI459- Midterm Exam Guide - Comprehensive Notes for the exam ( 50 pages long!)
Document Summary
Both are involved in the passage or movement of materials. Excretion: removal of material from a living thing. Secretion: movement of materials (that can be metabolized and used by our bodies) from one point to another hormones. Gland: organ that releases certain substances for use in the body or for discharge into surroundings. Endocrine: separated from the surface (no ducts); secretions usually transported via circulatory system. Exocrine: maintain connection to surface; secretions empty to surface through ducts. Endocrine: secretion into the blood for transport internally to target tissues hormones. Exocrine: secretion into a duct that opens onto an external or internal surface sweat, saliva. Merocrine: secretion without visible damage to the secretory cell (involves exocytosis) peptide hormones. Apocrine: release by sloughing of outer or apical portion of secretory cell mammary gland. Holocrine: release through cell death and lysis sebaceous gland secretion. Cytogenous: release of whole, viable cells spermatozoa. Endocrinology: the study of endocrine glands/tissues and their products (hormones)
