The Cell Part II Flashcards
PROPERTIES OF PROTOPLASM:
- IRRITABILITY
- CONDUCTIVITY
- CONTRACTILITY
- RESPIRATION
- ABSORPTION
- SECRETION
- EXCRETION
- GROWTH
capability to respond to a stimulus
IRRITABILITY
can transmit a wave of excitation (an electrical impulse) throughout the cell from the point of stimulus
CONDUCTIVITY
highly developed in nerve cells lesser extent, in muscle cells
CONDUCTIVITY
property of changing shape in the sense of shortening
Ex. Muscle cells
CONTRACTILITY
essential for life process whereby food substances and oxygen within the cell interact chemically to produce energy, carbon dioxide and water
RESPIRATION
imbibition of materials that later may be assimilated by the cell in metabolism or otherwise utilized
ABSORPTION
process by which cell extrudes material (useful)
SECRETION
such as digestive enzyme or a hormone
SECRETION
extrusion of waste material from the cell
EXCRETION
increase in size
GROWTH
Fluid component of cytoplasm
CYTOSOL
exhibits functional interactions among organelles
CYTOSOL
Results in:
Uptake and release of material
CYTOSOL
Results in:
Protein synthesis (intracellular digestion)
CYTOSOL
metabolically active units of living matter
3 STRUCTURAL COMPONENTS OF CYTOPLASM ORGANELLES
limited by a membrane
3 STRUCTURAL COMPONENTS OF CYTOPLASM ORGANELLES
composed of a lipid bilayer and associated proteins
PLASMA MEMBRANE
envelopes the cell
PLASMA MEMBRANE
aids in maintaining its structural and functional integrity
PLASMA MEMBRANE
functions as a semipermeable membrane between the cytoplasm and the external environment
PLASMA MEMBRANE
sensory device
PLASMA MEMBRANE
recognize other cells and macromolecules
PLASMA MEMBRANE
composed of an inner leaflet (facing the cytoplasm) and an outer leaflet (facing the extracellular environment)
PLASMA MEMBRANE
exhibits a trilaminar structure (called the unit membrane)
PLASMA MEMBRANE
performs special processes like:
phagocytosis, pinocytosis, exocytosis
PLASMA MEMBRANE
composed of phospholipids, glycolipids, and cholesterol.
LIPID BILAYER
12 nm wide and 25 nm long
RIBOSOMES [PALADE GRANULES]
consist of a small and large subunit composed of several types of RNA
RIBOSOMES [PALADE GRANULES]
free in the cytosol
RIBOSOMES [PALADE GRANULES]
bound to membranes of the:
➢ rough endoplasmic reticulum
➢ outer nuclear membrane
RIBOSOMES [PALADE GRANULES]
actual sites of protein synthesis
RIBOSOMES [PALADE GRANULES]
responsible for the basophilic staining of the cytoplasm
RIBOSOMES [PALADE GRANULES]
site where non-cytosolic proteins are synthesized:
Secretory
Plasma membrane
Lysosomal
ROUGH ENDOPLASMIC RETICULUM [RER]
provide an area of storage and transport of proteins
ROUGH ENDOPLASMIC RETICULUM [RER]
irregular network of membrane bounded channels that lack ribosomes on its surface appearing smooth
SMOOTH ENDOPLASMIC RETICULUM [SER]
appears as branching anastomosing tubules or vesicles membranes
SMOOTH ENDOPLASMIC RETICULUM [SER]
less common than RER
SMOOTH ENDOPLASMIC RETICULUM [SER]
predominates in cells synthesizing steroids, triglycerides and cholesterol
SMOOTH ENDOPLASMIC RETICULUM [SER]
Smooth endoplasmic reticulum serves different functions in different cell types:
● steroid hormones and lipid synthesis
● drug detoxification (liver)
● muscle contraction and relaxation
parallel stacks of membranes (6-10) located near the nucleus
ANNULATE LAMELLAE
resemble the nuclear envelope, including its pore complexes
ANNULATE LAMELLAE
are continuous with the RER
ANNULATE LAMELLAE
are found in rapidly growing cells (germ cells, embryonic cells, tumor cells)
ANNULATE LAMELLAE
function is not fully known
ANNULATE LAMELLAE
rod-shaped organelles [0.2 µm (W) – 7 µm (L)] double layered sac
MITOCHONDRIA
possess an outer smooth membrane and an inner membrane, which invaginates to form cristae
MITOCHONDRIA
important in energy metabolism
MITOCHONDRIA
as major source of adenosine triphosphate (ATP)
MITOCHONDRIA
site of many metabolic reaction
MITOCHONDRIA