Carbohydrates 1 Flashcards
What is stage 1 of catabolism?
food –> building blocks
What is stage 2 of catabolism?
building blocks–> simpler molecules
What is stage 3 of catabolism?
Krebs
What is stage 4 of catabolism?
electron transport chain and oxidative phosphorylation
What enzymes breakdown carbohydrates?
glycosidase enzymes
What transporter activley absorbs sugars from SI?
Na- dependent glucose transporter 1 (SGLT1)
What transporter passively absorbs glucose?
GLUT2
How does glucose reach target cells?
GLUT 1-5
What is primary lactase deficiency? Who does it effect?
absence of lactase persistence allele
ADULTS
What is secondary lactase deficiency?
occurs as a result of injury to SI generally reversible
What is the autosomal recessive form of lactose deficiency?
congential lactase deficiency
Why can cellulose not be digested by the body?
contains beta 1-4 glycosidic bond which the enzymes cannot digest
Why are some tissue glucose dependent? Give examples
no mitochondria to carry out pathways other than glycolysis
RBCs, neutrophils
What are the key features of glycolysis?
C6 glucose to 2 c3 pyruvate
net production 2 ATP, 2 NADH
What enzyme allows glycolysis to work anaerobically?
lactate dehydrogenase
