To discuss:
The size range of most human cells, some exceptions outside this range and some factors that limit the cell from growing to unlimited size.
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). Micrometer (µm), also referred as micron, is highly useful in the measurement of cell sizes. It is a derived unit of the International System of Units (SI), which is equal to 1×10-6 meter (m) or 1×10-3 millimeter (mm).
Want to see the full answer?
Check out a sample textbook solutionChapter 3 Solutions
A&P UNITY AND FUNCTION ACCESS
- Overall functions of the cytoskeleton and the differences between microfilaments, intermediate filaments, and microtubulesarrow_forwardWhy cytoplasmic membranes are barriers but also permeablearrow_forwardAn organelle that contains centrioles which are composed of microtubules and pericentriolar materials with protein complexes that play a critical role during cell divisionarrow_forward
- Significance of compartmentalization of organelles and an example of compartmentalization in an organellesarrow_forwardRegulation of cytoskeleton function by cell signaling.arrow_forwardTrue or False? The selective permeability of the plasma membrane allows all substances to pass through the membrane, ensuring that the inside of the cell is in constant interaction with its external environment.arrow_forward
- A network of membranes where proteins are first synthesized and modified if they are bound for compartments of the endomembrane system, or will be secreted from the cell. Group of answer choices Golgi apparatus Lysosome Endoplasmic reticulum Mitochondrionarrow_forwardThe journey of a c f t r protein , folding and membrane insertion in the endoplasmic reticulumarrow_forwardtwo substances from the table above that would need to move into or out of a cell to maintain homeostasis and explain whyarrow_forward
- A cellular organelle characterized for being a partially permeable membrane which controls the exchange of materials between cell and its environment Cell Membrane Cell Wall Endoplasmic reticulum Cytoplasmarrow_forwardAll cells have these three things in common: a. cytoplasm, DNA, and organelles with membranes b. a plasma membrane, DNA, and a nuclear envelope c. cytoplasm, DNA, and a plasma membrane d. a cell wall, cytoplasm, and DNAarrow_forwardA cellular structure that renders a major contribution to mitochondrial and peroxisomal membranes by producing most of their lipids. Question 24 options: Golgi body membrane Nuclear membrane Endosome membrane Endoplasmic reticulum membranearrow_forward
- Biology Today and Tomorrow without Physiology (Mi...BiologyISBN:9781305117396Author:Cecie Starr, Christine Evers, Lisa StarrPublisher:Cengage LearningBiology: The Unity and Diversity of Life (MindTap...BiologyISBN:9781305073951Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa StarrPublisher:Cengage LearningHuman Physiology: From Cells to Systems (MindTap ...BiologyISBN:9781285866932Author:Lauralee SherwoodPublisher:Cengage Learning