What kinds of animal cells might have a lot mitochondria present?
According to
http://hyperphysics.phy-astr.gsu.edu/HBASE/Biology/mitochondria.html
it would be fat, muscle and liver cells. They are cells that manufacture ATP.
Animal cells that require a lot of energy for their function and activity tend to have a high abundance of mitochondria. Mitochondria are the organelles responsible for producing ATP (adenosine triphosphate), which is the main energy currency of cells. Therefore, cells that are very active and have high energy demands are likely to have a large number of mitochondria.
One example is muscle cells, specifically skeletal muscle cells. These cells are responsible for generating force and facilitating movement, and they require a significant amount of energy to contract and relax. As a result, skeletal muscle cells contain a large number of mitochondria to support the high-energy demands.
Similarly, cells in the heart, known as cardiac muscle cells, also contain numerous mitochondria. The heart is a continuously active organ that pumps blood throughout the body, requiring a substantial amount of energy. Therefore, cardiac muscle cells have a high mitochondrial density to generate the ATP necessary for the heart's constant contraction.
Other cells that require a lot of energy and, consequently, possess a significant number of mitochondria include neurons (nerve cells) as they require energy for transmitting electrical signals, and cells involved in active transport processes, such as kidney cells that participate in filtering blood and maintaining proper electrolyte balance.
In summary, animal cells with high energy demands, such as muscle cells, heart cells, neurons, and certain specialized cells, tend to have abundant mitochondria.