Why are the cells in the animal pole and vegetal pole of a medialecithal blastula different in terms of size? What has gravity got to do with it?
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Why are the cells in the animal pole and vegetal pole of a medialecithal blastula different in terms of size? What has gravity got to do with it?
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- Answer the following questions: 1. Is the cell flexible? 2. How can you determine the anterior and posterior end of ciliate mophologically? 3. How is the oral groove strategically advantageous for the Paramecium sp.?Which of these locomotor organs would likely be the shortest? a flagellum a cilium an extended pseudopod a pellicleWhat is the advantage of having a highly invaginatedinner membrane?
- What are extrusomes?a. hairs on flagellab. membrane sacs beneath the cell surfacec. tough-walled asexual cellsd. spearlike defensive structures shot from cells under attacke. special types of survival cystsWhich cell in human body contain Lamellipodia（be specific），does skeleton muscle cell contain Lamellipodia？Why is the plant cell rigid, but a human cheek cell is misshapen and folded over on itself?
- 1. In Figure 10, can you observe the unevenly thin stretch along the walls? If yes, identify these structures. 2. In Figure 10, can you distinguish the protoplast clearly? Yes or no?How is the cell cortex regulatedlocally and globally to coordinate itsactivities at different places on thecell surface? What determines, forexample, where filopodia form?Which are larger, animal pole cells or vegetal pole cells? Why?
- Globular cells are said to be spherical. When slightly flattened, they are disc-shaped. Squamous cells are thin, flattened and irregularly shaped. Spherical cells with slightly elongated ends are referred to as oval. When these ends are tapered, the cells assume a fusiform shape, which when further elongated become thread-like. Cuboidal cells are square; columnar cells are tall and rectangular, while cylindrical cells are tube-like. Some animal cells have cytoplasmic extensions which give them star-like appearance, these are said to be stellate. What is the shape of the cartilage cell(1), bone cell(2), and cardiac muscle(3) specimens? Choose whether spherical, disc-shaped, squamous, oval, fusiform, thread-like, cuboidal, columnar, cylindrical, or stellate.Briefly describe the function of the following: - sustentacular cell (supporting cell)What are the differences between a free living celled organism such as paramecium and a single human cell such as a cilliates cell of the respiratory tract?