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Question: fill in the blank write the word that correctly completes...

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Fill in the blank: Write the word that correctly completes the statement. Write your answer in the space provided. 4. A cotransporter is a protein that moves more than one molecule at a time. If the molecules are moved in the same direction, the transporters are called molecules are transported in opposite directions, the transporters are called carriers. A transport protein that moves only one substrate is called a(n) carrier. carriers. If the 5. In a signal transduction pathway, the signal ligand, also called the first messenger, binds to a(n) which activates and changes intracellular The three main amplifier enzymes are (a) which forms CAMP, (b) which converts a 6. which forms cGMP; and (c) phospholipid from the cells membrane into two different second messenger molecules. An enzyme known as protein kina se adds a functional group-一一 substrate, by transferring it from a(n) 7. to its molecule. 8. Receptors for signal pathways may be found in the or 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 letter of the correct response in the space provided for each communication method. Communication Property (a) Electric (b) Chemical (c) Both electrical and chemical 10. 11. Cytokine 12. Gap junction 13._ 14. Neurohormone Autocrine signa Hormone Neurotransmitter 16. Paracrine signal
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