Cytology Flashcards
Centrioles
Form spindle during mitosis
Parts of the cell
Plasma membrane, nucleus, cytoplasm
Centromere
Keeps the 2 identical strands of each chromosome attached
Centrosome
Two centrioles; organizes microtubules; participates in spindle formation during cell division
Chromatids
Duplicated chromosomes- sister chromatids
Chromatin
Loosely coiled DNA: DNA can direct the production if cellular proteins (transcription)
Chromosome
Most compact, organized level of genetic material; visible in the cell only when dividing
Cilia
Move substances over cell surface
Cytoplasm
Place of many metabolic processes in the cell
Cytosol
Contains ions used in cellular functions; support for organelles; viscous fluid medium through which diffusion occurs
Cytoskeleton
Maintains intercellular structural support and organization of cells; participates in cell division; facilitates movement
DNA
Genetic material that directs protein synthesis
Flagella
Propels sperm
Golgi apparatus/body
Modifies, packages, and sorts materials arriving from ER in transport vesicles; forms secretory vesicles and lysosomes
Inclusion bodies
Serve as temporary storage for molecules such as melanin, proteins, glycogen, lipids
Lysosomes
Digest microbes or materials (ex: ingested by cell, worn-out cell components, or entire cell)
Mitochondria
Make ATP in presence of oxygen
Nuclear membrane
Separates nucleus from cytoplasm
Nuclear pores
Allow passage of materials between cytoplasm and nucleoplasm (RNA, protein, ions, and small water-soluble molecules)
Nucleolus
Assembles ribosomes
Nucleus
Contains genetic material
Organelle
“Little organs” organized structures with unique characteristic shapes and functions; membrane bound or non-membrane bound
Peroxisomes
Detoxify specific harmful substances produced by or taken into the cell; engage in beta oxidation of fatty acids to acetyl CoA
Phospholipid bilayer
Physical barrier; regulates material movement in and out (semi-permeable); cell communication??