Concept explainers
To discuss:
Which organelles are considered membranous and why and which of these are enclosed in single or double membranes.
Introduction:
Cells are regarded as the simplest unit (structural and functional) of life. Cellular membrane, nucleus, and cytoplasm are the three major components of a cell. Cellular membrane, which surrounds the entire cell, is composed of phospholipids and proteins. The nucleus is bound by a nuclear membrane, and it possesses the genetic material of the cell. Cytoplasm consists of organelles, cytoskeleton (filaments and tubules), and inclusion bodies. Protoplasm denotes all living material that are present in the cell enclosed by the cellular membrane (inside and outside the nucleus).
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Anatomy & Physiology: The Unity of Form and Function
- Because the plasma membrane is selectively permeable, nothing can diffuse through the bilayer. True or Falsearrow_forwardOrganelles that are not found in all viable cells, such as flagella, microvilli, secretory vesicles, etc. are termed asarrow_forwardA serous membrane is at this level of organization.arrow_forward
- Briefly explain why each of the following statements is false, or reword it to make it true 7. Tight junctions function primarily to prevent cells from pulling apart.arrow_forwardOverall functions of the cytoskeleton and the differences between microfilaments, intermediate filaments, and microtubulesarrow_forwardCells are considered to be alive but none of the individual organelles inside the cell are. Explain what is meant by this.arrow_forward
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