Week 6 Flashcards
(6 cards)
What is the guideline adult energy, lipid, protein and water intake?
Energy - For men = 2,500 Kcal (10MJ) For women = 2,000 Kcal (8MJ) Protein -
What is apoptosis? How does apoptosis occur, and when does it occur?
Apoptosis is programmed cell death 1. Cell shrinkage, therefore cytoplasm comes more together as well as organelles 2. Chromatin condenses 3. Formation of apoptosis bodies and blebs Intracellular contents still intact 4. Phagocytosis by macrophages free the apoptosis bodies Occurs … During development, humans lose their tail and they also form fingers by apoptosis Immunity Hormone mediated atrophy - losing some part that has grown e.g. Tadpoles losing their tail on the way to becoming cute lil frogs
What is necrosis, how and when does it occur
Necrosis is uncontrolled cell death Occurs in the following steps … Cell swelling (water enters cell) or compromised membrane Release of Intracellular contents When does necrosis occur Viral infection Compliment- mediated necrosis Sheer stress of physical trauma
How are vitamins absorbed?
1) fat soluble vitamins are absorbed in the same way as fats 2) water soluble vitamins are absorbed by diffusion or carrier mediated transport 3) vitamin C and B1 are absorbed by Na+_dependent carriers 4) vitamin B12 by intrinsic factor
How are vitamins absorbed?
1) fat soluble vitamins are absorbed in the same way as fats 2) water soluble vitamins are absorbed by diffusion or carrier mediated transport 3) vitamin C and B1 are absorbed by Na+_dependent carriers 4) vitamin B12 by intrinsic factor
How is vitamin B12 absorped?
- vitamin 12 is bound to transcobalamin 1 or heptocorrin to protect against the low pH of the stomach (it is secreted by salviary glands)
- Intrisic factor is secreted by parietal cells whcih binds to cobalamin
- the complex is absorbed into the ileum (this is Ca2+ dependent)
- Cobalamin is bound to transcobalamin || which is absorbed into the blood
