Step 1: Understanding Lipogenesis
Lipogenesis is the process of converting glucose into fatty acids for storage. Insulin promotes lipogenesis by enhancing the uptake of glucose and stimulating fatty acid synthesis.
Step 2: Evaluating the Options
- Insulin: Correct, insulin promotes lipogenesis by activating key enzymes involved in fatty acid synthesis.
- Epinephrine: Stimulates lipolysis, the breakdown of fats.
- Glucagon: Also promotes lipolysis, counteracting lipogenesis.
- Thyroxine: Stimulates metabolism but does not directly enhance lipogenesis.
Step 3: Conclusion
Insulin enhances lipogenesis by promoting glucose storage as fat.
A closed-loop system has the characteristic equation given by: $ s^3 + k s^2 + (k+2) s + 3 = 0 $.
For the system to be stable, the value of $ k $ is:
A digital filter with impulse response $ h[n] = 2^n u[n] $ will have a transfer function with a region of convergence.