Mitochondria
They are called Enzymes
The cell membrane acts like the skin on your body because it coats the outside of the cell and protects the organelles.
When a receptor protein acts as an enzyme, the receptor protein activates a second messenger that acts as a signal molecule within the cell. Resources: HOLT Biology Textbook - 9th grade edition Chapter 4, Cells and Their Environment.
Integral protein. They wedge themselves into the phospholipids that make up part of the plasma membrane. The other type of protein is peripheral protein but it sits on the outside of the membrane.
Insulin
The ribcage acts as a cage and protects your vital organs.
Ricin is a biological toxin that acts by inhibiting protein synthesis by binding to the ribosomes and halting protein production.
The heart is the organ that acts like a pumping machine in the body. It circulates oxygen-rich blood throughout the body to deliver nutrients and oxygen to cells while removing waste products.
Protein helps build and maintain body tissues like muscles Enzymes and hormones and other compounds in the body are made of protein Protein is used to make hair, skin and nails
The Cajal body acts like the nucleolus in that it is involved in the processing and modification of ribosomal RNA. Like the nucleolus, the Cajal body is also found in the nucleus of the cell and plays a role in ribosome biogenesis.
The body does store protein. Muscles are made almost entirely of protein, and when the body has a serious protein shortage, it can obtain protein from its muscles (which shrink accordingly).
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