When you hear your stomach grumble, it is most likely influenced by the hormone epinephrine insulin ghrelin cytokines user: as you read this lesson and type on your computer, you are using the second largest part of your brain called the cerebrum cerebellum hypothalamus brain stem

The first blank can be filled with ghrelin and the second blank can be filled with cerebellum.

Explanation:

Ghrelin refers to a hormone, which is discharged and generated mainly by the stomach, however, the small concentrations are also discharged by the pancreas, small intestine, and the brain. It performs various activities, and is also known as the growth hormone, as it enhances the intake of food, instigates appetite, and encourages storage of fat.  

The second-largest part of the brain is cerebellum. It is a part of the hindbrain situated under the occipital lobe of the cerebrum. The cerebellum is differentiated into two lobes, that is, anterior and posterior. The cerebellum is accountable for monitoring the movement and coordination of muscles. Therefore, it possesses the tendency to monitor how one performs physical activities like speaking, walking, and typing on computer.