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18 Cards in this Set
- Front
- Back
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WHAT ARE THE 4 CHARACTERISTICS OF LIFE
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1) engage in metabolism
2) sense stimuli and respond to it 3) capacity to reproduce 4) growth and evolve |
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DEFINITION OF TISSUE
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lots of IDENTICAL cells
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4 TYPES OF POST PARTUM TISSUES
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1) epithelial
2) connective tissue 3) muscular 4) nervous |
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NEGATIVE FEEDBACK
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High <> of something initiates events that decrease the <> toward normal. (Which is negative to the initiating stimulus)
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POSITIVE FEEDBACK
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initiating stimulus causes more of the same-- leads to instability (ex- blood clotting, complement system)
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VISCERAL
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in close contact with the organ
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PARIETAL
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the one in close contact with the wall of the cavity
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LYSOSOMES
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only WBC with phagocytic activity contain lysosomes
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CELL PROJECTIONS
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CILIA - locomotion -move things around
VILLA - used to increase absorption surface area (found in digestive, small intestine, and urinary system) FLAGELLUM - tail as in sperm |
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PROTEINS
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- long chains of a.a.
2 together is a dipeptide > 2 polypeptide >50 protein |
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mRNA
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carries the genetic code to the cytoplasm for controlling the type of protein formed
****contains CODONS that are exactly complementary code triplets from the DNA |
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tRNA
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transports activated a.a. to the ribosomes to be used in assembling the protein molecule.
20 different types of tRNA, each one specific for a specific protein -transports it's specific type to the ribosomes to make proteins ANTICODON - specific code in tRNA that allows it to recognize a specific codon on mRNA |
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PATHWAY FOR THE RIBOSOMES
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Ribosomes formed in the nucleolus --> binds with ribosomal proteins --> immature subunits --> cytpolasm --> assembled to become functional ribosomes
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NUCLEUS
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site of transcription, mRNA made on DNA template
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TRANSLATION
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mRNA leaves through nuclear pore and attaches to ribosome in CYTOPLASM --> translation begins
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CELL CYCLE TWO MAIN COMPONENTS
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1) interphase
2) mitosis |
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INTERPHASE
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G1 - growth and gather
S - synthesis DNA is duplicated (or cell can't go into mitosis) G2 - further growth and final preparation |
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MITOSIS
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portion of cell cycle when cell divides into two identical cells
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