Question

1. True or False? In the Cori Cycle, actively contracting muscle cells convert pyruvate to lactate. Lactate is transported in blood to liver, where it is "recycled" by gluconeogenesis to glucose, which is transported back to muscle for additional ATP production. Muscle contracting aerobically must reduce pyruvate to lactate by reoxidizing NADH to NAD+. NAD+ is required for glycolysis and production of ATP during low oxygen conditions. 2. True or False? Symport & antiport are types of cotransport systems where only one solute moves through the membrane. In symport, both move in same direction. In antiport, one solute goes in one direction and the other in the opposite direction. The Na+K+ ATPase of plasma membrane is an antiport system moving K+ in and Na+ out in ratio of 2 K+ per 3 Na+

          1. True or False? In the Cori Cycle, actively contracting muscle
cells convert pyruvate to lactate. Lactate is transported in blood
to liver, where it is "recycled" by gluconeogenesis to glucose,
which is transported back to muscle for additional ATP production.
Muscle contracting aerobically must reduce pyruvate to lactate by
reoxidizing NADH to NAD+. NAD+ is required for glycolysis and
production of ATP during low oxygen conditions.
2. True or False? Symport & antiport are types of
cotransport systems where only one solute moves through the
membrane. In symport, both move in same direction. In antiport, one
solute goes in one direction and the other in the opposite
direction. The Na+K+ ATPase of plasma membrane is an antiport
system moving K+ in and Na+ out in ratio of 2 K+ per 3 Na+

Added by Juan Francisco R.

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