Question

11. In healthy individual, which two events are likely to occur at the same time?

a. Glycogenesis and gluconeogenesis

b. Lipolysis and increased plasma glucagon levels

c. Release of fatty acids from the adipose tissue and increased plasma insulin levels  

13. Why is the liver less likely to produce ATP from fatty acid oxidation?

a. The liver prefers to oxidize glycogen stored in the tissue

b. Oxaloacetate levels in the liver is too low to produce ATP from fatty acids

c. Access to fatty acids in the liver is limited due to the absence of a fatty acid transporter

Answer 1

11.C

Insulin inhibits the breakdown of fat in the adipose tissue by inhibiting the intracellular lipase that hydrolyzes triglycerides to release fatty acids.Hence the insulin is involved in the storage of fat in the adipose tissue.Insulin act as an anti-lipolytic hormone by reducing the activity of hormone-sensitive lipase , which is needed to release the fatty acids from the adipose tissues as triglycerides.

The Glycogenesis gluconeogenesis can't occur at the same time in an individual, but in different tissues.These have important physiological roles in the human body.Both are controlled by the inter and intracellular signals.These are reciprocally regulated such that both of these will not occur in the same cell at the same time

13.A

Fatty acid oxidation occurs as a part of energy production in case of glucose is not available such as in starvation and fasting.Since glycogen is available for oxidation in normal cases, most of the energy is produced from the glycogenesis itself.