BIOL 1080 Study Guide - Midterm Guide: Calcium Signaling, Bone Density, Thyroid

• School: University of Guelph
• Department: Biology
• Course: BIOL 1080
• Professor: Dr. David Dyck

Document Summary

Consume sufficient calcium, get adequate vitamin d, exercise most day of the week, maintain a stable body mass, get plenty of sleep (at night). Smoking, alcohol, caffeine, high phosphate diets, drugs (stress- like) 90% of max bone density is achieved by the age 20. It serves as a (cid:862)(cid:271)uffer(cid:863) to assist i(cid:374) the (cid:373)ai(cid:374)te(cid:374)a(cid:374)(cid:272)e of (cid:271)lood (cid:272)al(cid:272)iu(cid:373) le(cid:448)els. Blood calcium levels must be maintained over a very narrow concentration zone to permit normal cell signalling and the function of electrically excitable tissues like nerve and muscle. Too high or too low calcium concentrations in the blood can rapidly lead to acute illness and death. Blood calcium is controlled by the ccn through homeostasis. With regards to blood calcium; there is very little variation in the body regardless on the input. Parathyroid hormone: secreted by the parathyroid glad acts in increase blood calcium.