Fill in the blank: Write the word that correctly completes the statement. Write your answer in the space provided Acotransporter is a protein that moves more than one molecule at a time. if the molecules ane moved in the same drection, the transporters are called molecules are transported in opposite directions, the transporters are called camiers. A transport protein that moves only one subistrate is called a(n) carriers the 5 In a signal transduction pathway, the signal ligand, aso called the first messenger, binds to aln) Which activates and changes intracelldar 6. The three main amplifier enzymes are (a) which forms CAMP.(b) which converts a which forms cGMP,and (c) phospholipid from the cell’s membrane into two diffierent second messenger molecules 7. An enryme known as protein kinase adds a functional group to its substrate, by transfering it from aln) & Receptors for signal pathways may be found in theo of the cell. 9. In a negative feedback loop, the response moves the system in the same/opposite) direction as the stimulus moves it Matching: Match the communication method with its property. Write the leter of the correct response n the space provided for each communication method Communication Property (a) Electric b) Chemical )Both electrical and chemical 10 Autocrine signa Cytokine Gap junction Hormone 12. 13. 14 15. 16. Paracrine signal