Cell Structure and Function Flashcards
Basic function of nucleus:
Contains DNA molecules and Nucleolus
Basic function of plasma membrane:
Controls movement of substances into and out of the cell
Basic function of centrioles:
A.k.a. Cenrosomes. Form mitotic spindle, needed to form cilia and flagella
Basic function of chromatin:
Long thin strands within nucleus. Each strand composed of one DNA molecule and associated proteins.
Basic function of cytoplasm:
Area of the cell that includes the cytosol and organelles
Basic function of cytosol:
Fluid portion of the cytoplasm that surrounds organelles
Basic function of organelles:
Varies. Organelles are everything in the cytoplasm except the nucleus and the cytosol.
Basic function of mitochondria:
Makes ATP via aerobic cellular respiration
Basic function of nucleolus:
Assembly site for ribosomes
Basic function of ribosomes:
Site of protein synthesis
Basic function of lysosomes
Enzymes digest and recycle worn out organelles and substances entering the cell ( can digest the cell)
Basic function of cytoskeleton:
Three kinds of protein filaments, maintain cell shape and involved in cell movement and movement of organelles
Basic function of cilia:
Abundant, hair-like cell projections that move fluids and particles along the cell surface
Basic functions of flagella:
Long cell projections; whip-like motion moves sperm
Define Term: interphase
When the cell is not dividing, but carrying out its normal activities
Define term: mitotic phase
When the cell is engaged in cell division
Define term: Mitosis
The process of cell division, specially, the nucleus dividing into two
Define Term: cytokinesis
The process by which the cytoplasm is split into two new cells to complete cell division
Define Term: prophase
Nucleolus and nuclear membrane disappear, chromatin condenses into chromosomes, centrioles move to opposite poles, spindle fibers form. STAGE 1.
Define Term: Metaphase
Chromosomes line us at metaphasal plate, spindle fibers attach to centromeres of chromatids. STAGE 2.
Define Term: Anaphase
Chromatids of chromosomes separate, move to opposite poles. STAGE 3.
Define Term: Telophase
Cell reverse prophase activities. FINAL STAGE.
Find: Mitochondrion
1
Find: Peroxisome
2
Find: Smooth Endoplasmic Reticulum
3
Find: Lysosome
4
Find: Plasma Membrane
5
Find: Centrioles
6
Find: Microvillus
7
Find: Flagellum
8
Find: Cilium
9
Find: Secretory Vesicle
10
Find: Chromatin
11
Find: Nuclear Membrane
12
Find: Nucleolus
13
Find: Nucleus
14
Find: Cytoplasm
15
Find: Rough Endoplasmic Reticulum
16
Find: Ribosome
17
Find: Golgi Complex
18
Define the phase of cell division
Telophase (also cytokinesis). Nuclear envelopes and nucleoli reappear; chromosomes resume chromatin form; mitotic spindle disappears.
Define the phase of cell division
Metaphase. Centromeres of chromatid pairs line up at metaphase plate.
Define the phase of cell division
Anaphase. Centromeres split; identical sets of chromosomes move to opposite poles of cell.
Define the phase of cell division
Prophase. Chromatin fibers condense into paired chromatids; nucleolus and nuclear envelope disappear; each centrosome moves to an opposite pole of the cell.
Define the phase of cell division
Interphase. Period between cell divisions; chromosomes not visible under light microscope.
What is the order of phases in Mitosis?
- Interphase – pre-mitotis.
- Prophase
- Metaphase
- Anaphase
- Telophase