Question

create spindles that are helpful in moving and organizing chromosomes. 10. ________ are long, whip - like tails that help move a sperm cell. 11. ______ are shorter than #10, but are very numerous. these filaments are used to move fluids along a tissues surface. 12. the ________ is built from microtubules and provides structure and support for the cell. discuss the free radical theory. discuss cystic fibrosis what is autophagy? what three structures make up the cytoskeleton? describe the structural difference between chromatin and a chromosome. what is the nucleolus?

Explanation:

1. Flagella are long, whip - like tails that aid in sperm cell movement.
2. Cilia are shorter than flagella and numerous, used for moving fluids along tissue surfaces.
3. The cytoskeleton is made of microtubules and provides cell structure and support.

Free radical theory: It posits that unstable molecules (free radicals) with unpaired electrons can cause cellular damage and contribute to aging and diseases by reacting with important cellular components.
Cystic fibrosis: An inherited disorder caused by a defective gene that affects the production of mucus, sweat, and digestive juices, leading to problems in the lungs, pancreas, and other organs.
Autophagy: A cellular process in which cells break down and recycle their own components to maintain homeostasis and survive under stress conditions.
The three structures of the cytoskeleton are microfilaments, intermediate filaments, and microtubules.
Chromatin is a loosely coiled combination of DNA and proteins, while a chromosome is highly condensed chromatin during cell division.
The nucleolus is a sub - structure within the nucleus where ribosomal RNA (rRNA) is synthesized and ribosome assembly begins.

Answer:

1. Flagella
2. Cilia
3. Cytoskeleton

Free radical theory: Unstable molecules cause cellular damage and contribute to aging/disease.
Cystic fibrosis: Inherited disorder affecting mucus - related secretions and organ function.
Autophagy: Cellular recycling process for homeostasis.
Cytoskeleton structures: Microfilaments, intermediate filaments, microtubules.
Chromatin - chromosome difference: Chromatin is loosely coiled, chromosome is highly condensed.
Nucleolus: Site of rRNA synthesis and ribosome assembly in nucleus.