Table of Contents
What are small hairlike structures used for movement?
Scientists have found a previously unrecognized role for tiny hair-like cell structures known as cilia: They help form our sense of touch. Cilia, tail-like projections found on the surface of cells, are perhaps best known as molecular flippers that help cells move around.
What cellular structure is used for movement?
The cytoskeleton provides a structural framework for the cell, serving as a scaffold that determines cell shape and the general organization of the cytoplasm. In addition to playing this structural role, the cytoskeleton is responsible for cell movements.
What is a long hairlike structure that helps a cell move?
Flagella (singular = flagellum) are long, hair-like structures that extend from the plasma membrane and are used to move an entire cell, (for example, sperm, Euglena).
What structure is used for movement?
Flagellum, plural flagella, hairlike structure that acts primarily as an organelle of locomotion in the cells of many living organisms.
Which type of cell is bigger?
Like a prokaryotic cell, a eukaryotic cell has a plasma membrane, cytoplasm, and ribosomes, but a eukaryotic cell is typically larger than a prokaryotic cell, has a true nucleus (meaning its DNA is surrounded by a membrane), and has other membrane-bound organelles that allow for compartmentalization of functions.
Which structure is unique to plant cells?
Plant cells have certain distinguishing features, including chloroplasts, cell walls, and intracellular vacuoles. Photosynthesis takes place in chloroplasts; cell walls allow plants to have strong, upright structures; and vacuoles help regulate how cells handle water and storage of other molecules.
What structures in the cell shown in Figure 7 2 What are their functions?
Which structure in the cell shown in Figure 7-2 above stores materials, such as water, salts, proteins, and carbohydrates? The cell membrane contains channels and pumps that help move materials from one side to the other.
What are the major cellular structures?
A cell consists of three parts: the cell membrane, the nucleus, and, between the two, the cytoplasm. Within the cytoplasm lie intricate arrangements of fine fibers and hundreds or even thousands of miniscule but distinct structures called organelles.
Which cells do not have a nucleus?
Prokaryotes are organisms whose cells lack a nucleus and other organelles. Prokaryotes are divided into two distinct groups: the bacteria and the archaea, which scientists believe have unique evolutionary lineages. Most prokaryotes are small, single-celled organisms that have a relatively simple structure.
What is the basic structure of flagellum?
A bacterial flagellum has three basic parts: a filament, a hook, and a basal body. The filament is the rigid, helical structure that extends from the cell surface. It is composed of the protein flagellin arranged in helical chains so as to form a hollow core.
What is the largest cell?
Name the biggest cell? The largest cell is the egg of an ostrich. Its size is around 170mm x 130mm.