Topic 3 Lesson 3 - Lesson 3(Minerals III Calcium(Ca2 99 of it used for formation of bones teeth 1 used for nerve transmission blood clotting o

Topic 3 Lesson 3 - Lesson 3(Minerals III Calcium(Ca2 99 of...

This preview shows page 1 - 3 out of 3 pages.

° Lesson 3 (Minerals III) : ° Calcium (Ca 2+ ) 99% of it used for formation of bones & teeth 1% used for nerve transmission & blood clotting o Determined by Sydney Ringer (1883) that the body needs Ca 2+ for nerve impulses to function Intake varies enormously Recommended amounts also vary ° Nutritional status of elite swimmers o Males RDA of calcium is 2.7 times higher than regular RDA o Females 1.18 times higher Net Calcium intake: o Intake = 250mg, 85mg lost in urine, 265 lost in stool. Net intake of -100mg Much of it is lost & excreted ° Osteoporosis Linked to low dietary calcium ~9 mill. associated fractures worldwide Affects women more than men (affects men who are >60 usu.) Risk factors: o Short stature
Image of page 1
o Underweight o Early Menopause o Physical Inactivity o Alcoholism o Smoking o Excess Caffeine o Excess Protein o Excess Fiber Resorption for post menopausal women is 1 – 5% per year o Resorption is the loss of bone mass o At 5% per year, ½ the bone mass is gone in ~14 years
Image of page 2
Image of page 3

You've reached the end of your free preview.

Want to read all 3 pages?

  • Spring '10
  • Multiple
  • bone mass, Uterine cancer

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture