Cytoplasm Flashcards
The cytoplasm is in between what?
Plasma membrane and nucleus
2 compartments of the cytoplasm
- Cytosol
- Organelles
Other term for cytosol
Intracellular fluid
What 55 of the total cell volume is the the cytosol?
55%
Site of chemical reaction in a cell’s existence
Cytosol
Building blocks for maintenance of cell structures and cell growth
Cytosol
Network of protein filaments
Cytoskeleton
Contributes to structure of organelles
Cytoskeleton
The cytoskeleton aids movement of (1) within the cell, of (2) during cell division, and of (3) such as phagocytes
- organelles
- chromosomes
- whole cells
Types of the cytoskeleton
Intermediate Filaments
Microfilaments
Microtubules
Thinnest element of the cytoskeleton
Microfilaments
Composition of the microfilaments
Actin and Myosin
This helps generate movements and provides mechanical support (responsible for strangth and shapes)
Microfilaments
Non-motile, microscopic fingerlike projections
Microvilli
Thicker than filaments
Intermediate filaments
These are exceptionally strong, and are found on cells subject to stress
Intermediate filaments
These stabilize organelles and helps attach cells to one another
Intermediate filaments
Largest type of the cytoskeleton
Microtubules
Describe microtubules
Long, unbranched hollow tubes
Composition of the microtubules
Protein, specifically insulin
These help determine the cell shape, and function in movement of organelles, cell division, and cell projections
Microtubules
Differentiate flagella from cilia
Flagella is the longer part of tha tail; Cilia is shorter and is part of the flagella
Specialized structures within the cell that have characteristic shapes, and performing specific functions
Organelles
Organelles have their own set of —
enzymes
Serves as functional compartment for biochemical processes
Organelles
Organelles halps maintain —
homeostasis
Where is the centrosome located?
Near the nucleus
Parts of the centrosome, its shape, and composition
Pair of centrioles
- cylindrical
- composition: 9 clusters of 3 microtubules arranged in circular pattern
Pericontriolar material
- ring-shaped
- composition: tubulin
For growth of mitotic spindle
Pericentriolar Material
Anchored in th ebasal body of the plasma membrane and function to move fluid along the cell’s surface
Cilia
Moves in a forward motion and moves the entire cell
Flagella
Ribosomes function as —
site of protein synthesis
High content of ribonucleic acid, each one with 50 proteins
Ribosomes
2 subunits of ribosomes
Large and small
Where is the ribosome made?
Nucleolus
3 areas where ribosomes are located/ can be released
- Outer membrane of the nuclear membrane and to the ER
- Free/ unatteached
- Mitochondria
Network of membrane in a form of flattened sacs/ tubules
Endoplasmic reticulum
2 classifications of ER and differentiate
- Rough ER- has ribosomes; for processing and sorting
- Smooth ER: doesn’t have ribosomes; produce secretory proteins, membrane proteins, many organelle proteins
What does the rough and smooth ER synthesize
Rough ER: Glycolipids and phospholipids
Smooth ER: Fatty acids and steroids (estrogen & progesterone)
Transport pathway
Golgi complex
3-20 cisternae/ cavities
Golgi complex
Describe the Golgi complex
Small, flattened membranous sacs with bulging edges
Modifies, sorts, packages and transport proteins received from the ROUGH ER
Golgi Complex
Describe the lysosomes
Membrane-enclosed vesicles that form the Golgi complex
Contains 60 kinds of powerful digestive and hydrolytic enzymes
Lysosomes
Lysosomes digest subs that enter the cell via (1) and transport end products of digestion to the (2)
- Endocytosis
- Cytosol
Differentiate autophagy from autolysis
Autophagy is the digestion of worn-out organelle
Autolysis is the digestion of the entire cell
In autophagy, the organelle that will be digested will be enclosed in a membrane to create a vesicle
Autophagosome
Other term for perixosomes
Microbodies
Contains several oxidases that can oxidize various organic subs
Perixosomes
Oxidizes alcohol
Perixosomes
Without perixosomes, byproducts of metabolism could accumulate in the cell and result to —
cell death
Tiny. barrel-shaped structure with 4 staced proteins around a central core
Proteasomes
Funtion of the proteasome
Continuous destruction of unneeded, damed, or faulty proteins
How does the proteasomes play a negative feedback?
By halting rhe pathway once the appropriate responses has been achieved
Generates most ATP through aerobic respiration
Mitochondria
ocation of the mitochondria
Within the cell where oxygen enters and where ATP is used
Parts of the mitochondri
Inner mitochondrial membrane
Outer mitochondrial membrane
The mitochondria plays an important role in APOPTOSIS whinch means —
Programmed cell death
The mitochondria can (1), have (2) genes, and have their own (3) of DNA
- self replicate
- 37
- circlar copies
Where are mitochondrial genes inherited?
Mothers
All mitochondira are descendants of those present in the — during ferilization
oocyte (egg)
What organelles does the head of the sperm usually lack?
ER
Golgi complex
Mitochondria
Ribosomes