Changing a river into a lake is basically what a large dam does. one reason we do this to create reservoirs of fresh water. however, dams change the local ecosystem in a big way. what is one negative impact of building a dam

One negative impact of building a dam could be that it affects natural habitats of animals who live in and around the river. When you build a dam, the river's height becomes smaller because a huge amount of water becomes technically removed or blocked. This can affect animals such as fish or beavers or anyone who needs that water.

Ventromedial hypothalamus.

Explanation:

Ventromedial hypothalamus is a part of the hypothalamus in the brain that is responsible for controlling blood glucose levels. It stimulate the pancreas to release hormones like insulin which stabilize the blood glucose levels.

The hypothalamus also stimulate the adrenal gland to make and release cortisol in the blood which increase blood glucose levels when it is low.