DISCUSSION ESSAY

This discussion question is worth 50 points. As you study for your quiz this week, reflect back on what you have learned during this course. Discuss 1-2 concepts you learned in the material from this week.

1.The sense of smell, called olfaction, is made possible by paired olfactory organs. These olfactory organs, which are located in the nasal cavity on either side of the nasal septum, contain olfactory sensory neurons.2. The human olfactory system can discriminate between, or make subtle distinctions among, 2000–4000 chemical stimuli. Yet, our olfactory sensitivities cannot compare with those of other vertebrates such as dogs, cats, or fishes.

Then think back over the wealth of material covered in weeks 1-6 and discuss 3-4 major concepts you learned about.

1. Anchoring Proteins. Anchoring proteins attach the plasma membrane to other structures and stabilize its position. Inside the cell, membrane proteins are bound to the cytoskeleton, a network of supporting filaments in the cytoplasm. Outer membrane proteins may attach the cell to extracellular protein fibers or to another cell. 2. Anchoring Proteins. Anchoring proteins attach the plasma membrane to other structures and stabilize its position. Inside the cell, membrane proteins are bound to the cytoskeleton, a network of supporting filaments in the cytoplasm. Outer membrane proteins may attach the cell to extracellular protein fibers or to another cell. 3. Skeletal muscle fibers are quite different from the “typical” cells we described in Chapter 3. One obvious difference is size: Compared to other cells, skeletal muscle fibers are enormous. A muscle fiber from a thigh muscle could have a diameter of 100 μ m and a length up to 30 cm (12 in.). 4. Skeletal muscle fibers are quite different from the “typical” cells we described in Chapter 3. One obvious difference is size: Compared to other cells, skeletal muscle fibers are enormous. A muscle fiber from a thigh muscle could have a diameter of 100 μ m and a length up to 30 cm (12 in.).

These items should be well-thought-out. Your reflection should be a minimum of 275 words.