Brain Regions for Hunger and Fullness
The feelings of hunger and fullness are regulated by specific centers within the brain. The hypothalamus is a key structure involved in controlling appetite and satiety.
Hunger Signal Center
The lateral hypothalamus is recognized as a primary center that stimulates feelings of hunger. When this area is activated, it prompts the drive to eat.
Fullness Signal Center
The ventromedial hypothalamus plays a significant role in signaling satiety, the feeling of being full. Its activation typically leads to the cessation of eating.
Therefore, the lateral hypothalamus is associated with hunger, and the ventromedial hypothalamus is associated with the feeling of fullness.
Important Questions from Nervous system
Which one of the following synaptic vesicle proteins is involved in tethering of the vesicle to the cytoskeletal system in the nerve terminus?
In the nervous system, the action potential is generated at the axon hillock in physiological conditions and it is conducted to the terminal end of axon. The location specific origin of action potential and its direction-specific conduction are explained by a researcher in the following proposed statements:
A. The membrane of axon hillock has highest threshold for the generation of action potential
B. The membrane of axon hillock contains large numbers of voltage-gated Na+ channels and that makes it more excitable
C. The propagating action potential in the middle of the axon cannot generate another action potential in the direction of cell body since a large fraction of voltage-gated Na+ channels in the preceding portion is voltage inactivated
D. As the number of voltage-gated Na+ channels is less in the preceding portion of axonal membrane, the propagating action potential in the middle of the axon cannot generate another action potential in the direction of cell body.
Which one of the following combinations represents both correct explanations?
Which one of the following is NOT released by sympathetic preganglionic neurons?
The time taken by synaptic vesicles to travel from the soma of a motor neuron in the spinal cord to its neuromuscular junction in a person’s foot by fast axon transport is about‐
The release of which neurotransmitter from the rods of retina is reduced when light strikes its outer segment?
