Chapter 3 Review Flashcards
these are duplicates during the S phase
chromosomes
a special type of cell division performed by reproductive cells to reduce chromosome number
meiosis
this organelle synthesizes lipids and carbohydrates
SER
these cell projections increase surface area for increased membrane transport
microvilli
another name for the cell membrane
plasmalemma
this organelle digests foreign material
lysosomes
the genetically programmed death of cells
apoptosis
this term is used to describe the shrinking of red blood cells in a hypertonic solution
crenation
in this solution, cells absorb water and swell (ex: after you stay in the pool too long)
hypotonic
smallest living unit within the human body
cell
process of protein formation directed by mRNA
translation
part of the cytoskeleton used to move chromosomes during cell division
microtubules
makes up microtubules
tubulin
mRNA is needed to synthesize these in the cytoplasm
proteins
makes most of the ATO required to power cellular operations
mitochondria
these are the functional units of DNA that contain instructions for making one or more proteins
genes
proteins in the cytosine that accelerate metabolic reactions
enzymes
an alternative term for a tumor
neoplasm
in order to maintain cellular homeostasis, an exchange pump ejects ______ ions from the cell and imports ______ ions
sodium; potassium
the intake of small membrane vesicles from the extracellular fluid
endocytosis
process by which molecules move along concentration gradients with the help of membrane-bound carrier proteins
facilitated diffusion
this bilayer composes the plasma membrane
phospholipids
a network of intracellular membranes with attached ribosomes
RER
a process that requires cellular energy to move substances against the concentration gradient
active transport
the specialization process in which cells become limited in the range of proteins that can be made as genes are functionally eliminated
differentiation
these organelles form mitotic spindles to move chromosomes during mitosis
centrioles