The Cell Flashcards
What cells are the true, defined nucleus?
Eukaryotic
What parts do cells have in similarities in, in general?
plasma membrane nucleus endoplasmic reticulum golgi apparatus mitochondrion
what are sheet-like structures composed primarily of lipids and proteins
plasma membrane
what are plasma membranes held together by?
noncovalent interactions
lacking an affinity for water is
hydrophobic
having an affinity for water is
hydrophillic
protein on the membranes serve as
pumps, gates, receptors, energy transducers, and enzymes
True or False: membranes are asymmetrical
True
Plasma membrane has greater _____ content owing to the presence of glycolipids and glycoproteins
CHO
What is high in content and enhances the mechanical stability of the membrane and regulates its fluidity in plasma membrane
cholesterol
What are the metabolic pathways that occur in the cytoplasmic matrix?
glycolysis hexose monophosphate shunt glycogenesis glycogenolysis fatty acid synthesis, (also nonessential unsaturated fatty acids)
What is the primary site of oxygen use int eh cell?
the mitochondria
What part of the cell is responsible for the most metabolic energy produced (ATP)?
mitochondria
What cells don’t contain mitochondria?
erythrocyte
what do erythrocyte cells depend on for energy?
anaerobic mechanisms, primarily glycolysis
Krebs cycle and fatty acid oxidation are catalyzing reactions of the metabolic enzyme systems found in the
mitochondrial matrix
Because of its DNA content, what initiates and regulates most cellular activities?
Nucleus
What is located in the cytoplasm and is highly organized system of membranes,
the endoplasmic reticulum
a dotted membranous surface w/ribosomes and looks speckled is the
Rouch endoplasmic reticulum
a surface w/o ribosomes is called the
Smooth Endoplasmic reticulum
What are intracellular membranes that are organized into tubules that collect cellular materials, merge with the cell membrane, and discharge their contents to the outside of the cell?
Golgi Apparatus
What are lysosomes and peroxisomes filled with?
enzymes
what is normally intracellular enzymes that are retained w/in the cell by the plasma membrane
leakage
