1. Which of the following is NOT a type of cell signaling?
- Autocrine signaling
- Paracrine signaling
- Neuronal signaling
- Muscular signaling
Answer: d. Muscular signaling
2. Which of the following is NOT a type of cell surface receptor?
- Ion channel receptor
- Enzyme-linked receptor
- G protein-coupled receptor
- Nuclear receptor
Answer: d. Nuclear receptor
3. Which of the following is NOT a type of intracellular signaling pathway?
- G protein-mediated signaling
- Phosphatidylinositol signaling
- Calcium signaling
- Neurotransmitter signaling
Answer: d. Neurotransmitter signaling
4. Which of the following is NOT a type of signaling molecule?
- Hormones
- Neurotransmitters
- Growth factors
- Enzymes
Answer: d. Enzymes
5. Which of the following is NOT a function of cell signaling?
- Regulation of gene expression
- Maintenance of homeostasis
- Development and differentiation
- Transportation of materials
Answer: d. Transportation of materials
6. Which of the following is NOT a characteristic of ligand-gated ion channels?
- They are activated by ligands binding to them
- They are found on the plasma membrane
- They are activated by mechanical stress
- They are found in the nucleus
Answer: d. They are found in the nucleus
7. Which of the following is NOT a characteristic of G protein-coupled receptors?
- They are activated by ligands binding to them
- They are found on the plasma membrane
- They are activated by mechanical stress
- They are found in the nucleus
Answer: c. They are activated by mechanical stress
8. Which of the following is NOT a characteristic of enzyme-linked receptors?
- They are activated by ligands binding to them
- They are found on the plasma membrane
- They are activated by mechanical stress
- They are found in the nucleus
Answer: c. They are activated by mechanical stress
9. Which of the following is NOT a characteristic of receptor tyrosine kinases?
- They are activated by ligands binding to them
- They are found on the plasma membrane
- They are activated by mechanical stress
- They are found in the nucleus
Answer: c. They are activated by mechanical stress
10. Which of the following is NOT a characteristic of second messenger systems?
- They are activated by ligand binding to a receptor
- They involve the amplification of signaling
- They involve the activation of enzymes
- They are found in the nucleus
Answer: d. They are found in the nucleus
11. Which of the following is NOT a characteristic of intracellular receptors?
- They are activated by ligands binding to them
- They are found in the cytoplasm
- They are activated by mechanical stress
- They are found on the plasma membrane
Answer: d. They are found on the plasma membrane
12. Which of the following is NOT a characteristic of nuclear receptors?
- They are activated by ligands binding to them
- They are found in the nucleus
- They are activated by mechanical stress
- They are found on the plasma membrane
