NUR 280 EXAM 1
- Plasma Membrane
Answer
- protects internal organelles
- barrier from external environment
- selectively semipermeable
- glycoproteins (antigen) tells blood type
- Sodium-Potassium Pump
Answer
- Na+ ions higher concentration outside cell
- K+ ions higher concentration inside cell
- Uses energy to actively transport across cell membrane
- 3Na+ for 2K+
- medications can alter it
- Mitochondria
Answer
- Cell's energy producer
- Aerobic Metabolism
requires O2 1 / 3
- Cellular hypoxia = anaerobic metabolism (glycolysis)
- Unique DNA, only in mitochondria
- Subject to mutation by free radicals; passed mother to child
- Ribosomes
Answer
- Protein factories
- hypoxia causes decreased protein synthesis
- Nucleus
Answer
- cell mastermind
- DNA inside
- transcription happens here
6. DNA
Answer
- made up of nucleotides, purine bases, pyrimidine bases
- in replication one strand stays and on goes
7. RNA
Answer
mRNA - instructions of what to do next rRNA - linking of amino acids 2 / 3
tRNA - follows instructions
- Nucleotide Base Pairs
Answer
A with T and C with G
- Transcription
Answer
- occurs in the nucleus
- DNA helix untwists and separates
- single strand RNA
- Translation
Answer
- occurs in ribosomes
- Protein Synthesis
Answer
Forming proteins based on information in DNA and carried out by RNA
- Atrophy
Answer
less or no use; cells getting smaller
- / 3