Virtual Laboratory Activity - BIOL 1121 - Unit 5 Data Collection and Result While you are working on this virtual lab activity, please record your data in the tables below. 1. Data Collection Tables Cell Type Light Nitric Oxide Cytokine/Growth Factor Hormone Muscle Photoreceptor Cancer Leaf Parenchyma Fibroblast 2. Questions Based on your observations and from your readings of the chapter answer the following questions: 1. What type of biomolecules are receptors? 2. Once triggered, how is the signal processed inside the cell? 3. What are the most common receptors for growth factors? 4. What types of signaling proteins are common in animals but absent from plant cells, and vice versa? 5. How does signaling by hydrophobic molecules like steroid hormones differ from signaling by peptide hormones? 6. NO (nitric oxide) does not have a specific cellular receptor. How, then, does it act as a signaling molecule? 7. Discuss the validity of the following proposition. A signaling molecule (hormone, growth factor, or neurotransmitter) elicits identical responses in different types of target cells if they contain identical receptors. Cite an example. 8. What is the relationship between signal transduction pathways and second messengers? 9. Why are some hormone receptors intracellular proteins