HLTH1030 Lecture 10: HLTH1030-Lecture 10

• School: UNDA, NDA
• Department: Health Sciences
• Course: HLTH1030
• Professor: Monika Tschochner

Document Summary

Direct linkup of cell surface markers: complementary surface markers = surface receptors, e. g. to activate an immune cell. Indirect chemical messengers or signal molecules: secretory cell releases chemical messenger into ecf, messe(cid:374)ger (cid:271)i(cid:374)ds to spe(cid:272)ifi(cid:272) re(cid:272)eptors o(cid:374) the (cid:862)target(cid:863) (cid:272)ell, binding of messenger to receptor triggers a response in the target cell. Acetylcholine (ach): involved in triggering contraction of skeletal muscle; dopamine: precursor of norepinephrine; serotonin: especially active in constricting smooth muscles, contributing to wellbeing and happiness. Exocrine glands: produce non-hormonal substances, have ducts to carry secretion to membrane surface, e. g. Endocrine glands: typically have a rich vascular and lymphatic drainage for rapid dispersal of hormones throughout body, produce hormones. Lack ducts (secretion into blood: e. g. pituitary, thyroid gland. Example of endocrine glands and hormones: pituitary gland: follicle stimulating hormone (fsh), luteinizing hormone (lh), prolactin, growth hormone (gh, thyroid gland: thyroid hormones, calcitonin, parathyroid gland: parathyroid hormone (pth, adrenal glands: aldosterone, cortisol, epinephrine,