yes
Yes, they have a seperate nucleus and specialized organelles, so animals cells are indeed eukaryotic.
Brain Cells, and of course you know how they work!
in the epithelium of an animals stomach
The highly specialized fluid portion of the cell is the plasma.
One example would be the red blood cell, though in some animals such as birds they do have a nucleus per cell.
A muscle cell.
Yes, they have a seperate nucleus and specialized organelles, so animals cells are indeed eukaryotic.
Primarily for the construction of the Cell Membrane; secondarily for the construction of specialized Cell membranes, and thirdly for Metabolism.
Brain Cells, and of course you know how they work!
in the epithelium of an animals stomach
Each type of organelle is specialized to perform a specific function. Eg. mitochondria are specialized for cellular respiration. In this way functions of the cell are accomplished by these specialized structures. It is an example of division of labour within a cell.
Cell differentiation is when a less specialized cell changes into a more specialized cell. In multicellular organisms there are many specialized cells who get their jobs through cell specialization. Cell specialization changes a specialized cell into whatever type of cell the organism needs at the moment.
The pancreatic islet is a gland. A gland is a group of cells specialized in secretion. That's why it is a multicellular organism. The cells are eukaryotic because they have a nucleus. Bacterias for example are prokaryotic.
For one, that it is the process by which a less specialized cell becomes a more specialized cell type.
Because a single cell isn't very complex. The more cells an organism has, the more it can specialize it's cells, such as all the specialized cells that make up your brain, stomach, skeleton, muscles, etc. An organism that is made up of only one cell, that one cell has to do everything that each of our specialized cells do.
The highly specialized fluid portion of the cell is the plasma.
Every cell type have specialized proteins embedded in the plasma membrane making that cell specialized for a specific function. Muscle cells in our body are specialized for contraction. Nerve cells are specialized in conduction of messages.