human diet today Flashcards
why do we have a needy diet
we need a balanced diet otherwise we need vitamin supplements
who has more dietary requirements than most other animals and why
humans; we can’t make lots of things that other animals do
what deficiency is associated with retinol (A)
vitamin A deficiency
what deficiency is associated with thiamine (B1)
Beriberi
what deficiency is associated with riboflavin (B2)
Ariboflavinosis
what deficiency is associated with niacin (B3)
pellagra
what deficiency is associated with ascorbic acid (C)
scurvy
what deficiency is associated with cholecalciferol (D)
rickets and osteoporosis
what foods have vitamin D
fish, meat, and mushrooms
what has vitamin D
sunlight
what does vitamin D increase
the absorption of calcium
what does vitamin D enhance
bone growth
where did rickets occur
in Palaeolithic humans
where do other mammals make vitamin D
in their fur
do other mammals have skin cancer
no
when did we lose the option to make vitamin D in our fur
when we became the naked ape
why did natural selection allow other mammals to not have skin cancer and to make Vit D in their fur
thermoregulation
lots of sunlight, diet rich in fish and meat
when did lighter skin evolve
when we moved north and developed agriculture
what foods have vit C
fruits and vegetables
what disease was the disease of sailors and what did they use to combat it
scruvy; used limes
what animals make vit C
dogs and almost all other animals
what is the only mammal that can’t make vit C
humans
why can’t humans make vit C
it’s a mutation
it inactivated the gene
why wasn’t the mutation of not being able to make vit c eliminated by NS
our ancestral primates were fruit eaters and there are lots of vit c in fruit
when we became farmers we ate less fruit
