A) single loop
Fish have a two-chambered heart in which a single-loop circulatory pattern takes blood from the heart to the gills and then to the body.
Hormones- Person's sex hormones as held to influence behavior or mood.<span />
Answer:
Apart from the mentioned functions of a cell membrane, one of the prime functions of a cell membrane is to take part in the communication between the cell and its environment. The cell membrane is one of the most essential components that take part in communication and ensures that the messages are received and decoded appropriately.
A cell membrane comprises various proteins that plays an essential role in ensuring communication between the cells. These proteins obtain chemical information from other cells known as signaling molecules. When these molecules combine with the cellular membrane’s proteins they stimulate a modification or change in protein conformation, which then transmits the information into the cell and instigates a particular cellular reaction.
The most common cause is the accuracy of the measure instruments. And the observation of operator is also an important factor. That's why one measurement should do three times and use the average.
