Gen Zoo Chap 2 Flashcards
Basic unit of life
Cell
single-celled organism
Unicellular
have more than one cell
Multicellular
do not have nucleus
Prokaryotes
do not have nucleus
Prokaryotes
have nucleus
Eukaryotes
A selectively permeable enclosing the cell. Made by phospholipid bilayer
Plasma Membrane
towards inside
Hydrophobic
towards outside
Hydrophilic
All contents inside the cell other than nucleus
Cytoplasm
Most prominent organelle which contains of
linear chromosomes suspended
Nucleus
solution where nucleus
suspended
Nucleoplasm
specialized parts of certain
chromosomes that carry multiple copies of DNA
used to synthesize RNA
Nucleolus
double-layer membrane
enclosing the nucleus and contains pores to allow molecules to move between nucleus and cytoplasm
Nuclear envelope
Network of membranes throughout the
cytoplasm
Endoplasmic Reticulum
(ribosomes attached) protein
synthesis occurs
Rough ER
(no ribosomes attached)
Lipid/phospholipid synthesis; detoxify cell of
harmful substances
Smooth ER
Necessary for protein synthesis . Made of 2 small subunit and is numerous
Ribosomes
Composed of stack of membranous vesicles
Golgi complex
Function in storage, modification and packaging of polypeptide and protein products produce by the rough ER
Golgi complex
Used to be an extension of the nuclear envelope and used to be part of the endoplasmic
reticulum before detaching
Golgi complex
Detached/formed by Golgi complex
Lysosomes
Contains enzyme involved in breaking down
foreign material
Lysosomes
engulfing of cell
Phagocytosis
breakdown injured/diseased cell
Autophagy
programmed cell death (kill itself)
Apoptosis
Powerhouse of the cell. Produce ATP (for energy-transfer)
Mitochondria
Motile extensions of the cell surface
* Used for locomotion
* Flagellum is longer
Cilia/Flagella
Made of layers of tightly packed cells that line the surface of the body, organs, blood vessels, respiratory system and all the body cavities
Epithelial tissue
Made up of cells containing contractile
filaments (muscle fibers)
* Can lengthen or shorten
Muscular tissue
internal organs
like stomach and intestine
Smooth (involuntary)
Attached to the
bones; most common
Skeletal (voluntary)
walls of the
heart; for pumping blood
Cardiac (involuntary)
Responsible for holding tissues together
* Provide framework
Connective Tissue
Made up of nerve cells called neurons that
together form nervous system
Nervous tissue