Fever increases the body temperature and can induce chills to help cool the temperature back down. What other mechanisms are in place to regulate the body temperature? a. shivering b. sweating c. erection of the hairs on the arms and legs d. all of the above
Week 10 Fat Soluble Vitamins (A) March 15, 2017 I. Vitamin A A. Retinoids o Pre- formed vitamin A o Retinol (alcohol form), Retinal (aldehyde form), Retinoic acid (acid form) B. Pro- Vitamin A Carotenoids (precursors) o Β (beta) -carotene o 1/12 of the Vitamin A activity of retinol o 12 mcg β-carotene = 1 mcg retinol o Α (alpha) -carotene o 1/24 of the Vitamin A activity of retinol o 24 mcg α-carotene = 1 mcg retinol o β-cryptoxanthin o 1/24 of the Vitamin A activity of retinol o 24 mcg β-cryptoxanthin= 1 mcg retinol C. Carotenoids with no Vitamin A Activity o Lutein and zeaxanthin (abundant in dark leafy greens) are the only carotenoids found in the retina and lens of the eye; may help slow age-related macular degeneration and cataracts o Lycopene (abundant in tomatoes and tomato products) may help prevent prostate cancer, much more bioavailable when processed D. Food Sources o Retinoids o Liver, fish oils, eggs o Milk and fortified cereals o Carotenoids o Vegetables Dark green, orange/deep yellow o Some fruits o Stable in cooking E. Absorption of retinol 1. Retinol esters – retinol attached to a fatty acid 2. Lipases separ
