Specialized proteins in the cell membrane regulate the concentration of specific molecules inside the cell. ... Transporters carry a molecule (such as glucose) from one side of the plasma membrane to the other. Receptors can bind an extracellular molecule (triangle), and this activates an intracellular process.
Answer:
They are all part of the nervous system.
Explanation:
The brain and the spinal cord are part of the central nervous system and the peripheral nerves are part of the peripheral nervous system. The nervous system works as the communication/ control system of the body. It transmits signals throughout the body.
Answer:
External factors include physical and chemical signals. Growth factors are proteins that stimulate cell division. – Most mammal cells form a single layer in a culture dish and stop dividing once they touch other cells. Two of the most important internal factors are kinases and cyclins.
Answer:
B. Plankton are a food source for humans
Plankton is food for many small fish. With the abundance
of Plankton, these fish can thrive. When these smaller fish thrive they are food to bigger fish that we eat. Since the smaller fish thrive then the bigger fish that we eat also thrive. This makes bigger fish an abundant food source due to plankton supporting the smaller fish and other organisms.
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