NURS 314 Flashcards
Transription
First step of gene expression where DNA is copied
Translation
ribosomes create protiens
Protein production
The result of translation and transcription
Genes
Sequence of DNA that contains the instructions make protein
DNA Replication takes place where?
Nucleus
Where does DNA remain during replication?
Nucleus
The point where DNA is split and replicated
Replication Fork
RNA polynerase
Assists in transcription
Three types of RNA
1) mRNA - messenger RNA
2) tRNA - transfer RNA
3) rRNA - ribosome RNA
Which RNA carries the gene copy outside of the nucleus?
mRNA
rRNA is created where?
In the ribosomes
Known as mitochondrial DNA
Exons and Introns play what role in transcriptions?
Knows the type of the cell to create
The RNA type that is the glue that holds everything together.
rRNA
Telomeres
DNA sequence at the ends of the chromosomes
Result of telomeres continued replication.
Mutations or development of cancer cells
Daughter cell
germ line
Gametes
Mitosis results in the formation of gametes
False
Meiosis is the cell division that forms gametes
Crossing-over
chromosome pairs align and ends exchange
Two genes that are close together on the chromosome are called
Linkage
Ex. red hair and freckles
Punnet Square
Summarizes the genetic inheritance process.
Helps figure out the likelihood of dominant traits
Alleles
Copy of genes
Homozygous
If all your copies of a gene are alike
Heterozygous
If copied genes differ.
Carrier
If you are heterozygous for a recessive trait and do not show it
Hemizygous
If you only have one copy of a gene
Induction
Turns on a gene
Repression
Turns a gene off
Can socioeconomic status lead to induction or repression?
Yes
Polygenic
Many genes could affect one trait
Multifactorial
Both multiple genes and the environment could affect one trait
Epistasis
One gene could mask the effect of another
Complementary
One gene might depend on another
Two genes together might create a new phenotype
Collaborative
Gene mutation - Inherited
Present in all body cells; passed from parent to child through egg and sperm
Gene mutation - Spontaneous
Can occur in individual egg or sperm at time of conception. Can be passed to future generations
Gene Mutation - Acquired (somatic)
Occur in body cells other that egg of sperm. Changes in DNA that take place after conception.
Can somatic gene mutation be passed to offspring?
Yes
Autosomal dominant
Trait expressed with one copy of gene. Fifty percent chance of passing it on
brown eyes or Huntington’s disease
Autosomal recessive
Require two copies of the gene, one from each parent.
blue eyes or cystic fibrosis, sickle cell anemia, PKU
X-linked
Carried on the X chromosome
Passed from Mother to off-spring. Cannot be passed by father.
hemophilia, Duchenne muscular dystrophy
Mitochondrial DNA
Disorders can affect both male and female but only passed by females (in ova but not sperm)
In Mitochondria only
Multifactorial
Traits may cluster in families, but do not have characteristic pattern of inheritance
neural tube defects,
Teratogens
Environmental agents that produce birth defects during embryonic and/or fetal development
Three types of tetratogenics
1) Radiation
2) Drugs and chemical substances
3) Infectious agents
Fetal alcohol syndrome
refers to a host of cognitive, physical, and behavioral abnormalities that result from maternal alcohol consumption.
Cocaine’s affects on the fetal growth
preterm births, growth retardation, microcephaly, neurologic deficits, limb size reduction, hydronephrosis, and ambiguous genitalia. The higher the dose, the worse the manifestations
Folic acid is…
important for DNA synthesis and cell division
TORCH screening detects what?
Antibodies against teratogen microorganisms in infant serum
TORCH acronym:
- Toxoplasmosis-protozoa
- Other (varicella, TB, Epstein-Barr)
- Rubella
- Cytomegalovirus
- Herpes virus
Why is Genomics Important?
Plays a role in 9 of 10 leading causes of death
Health
- State of physical, mental, spiritual, and social functioning within developmental context
- Individual and societal responsibility
Disease
- Failure of adaptive mechanisms
- Results in functional or structural disturbances
Illness
-Subjective experience of individual and physical manifestation of disease
Function
- Levels reflected in terms or performance/social expectations; loss indicator of need for nursing intervention
Disability
Impairment that substantiates limits one or more major life activities
Wellness
An active process through which people become aware of, and make choices toward, a more successful existence
Healthy People 2020 - Overarching Goal #1
1) Attain high quality, longer lives free of preventable disease, disability, injury, and premature death
Healthy People 2020 - Overarching Goal #2
2) Achieve health equity, eliminate disparities, and improve good health of all groups
Healthy People 2020 - Overarching Goal #3
3) Create social and physical environments that promote good health for all
Healthy People 2020 - Overarching Goal #4
4) Promote quality of life, healthy development, and healthy behaviors across all stages of life
Six Dimensions of Wellness
- Occupational
- Physical
- Social
- spiritual
- Intellectual
- Emotional
Health promotion
The process of enabling people to increase control over, and to improve, their health.
Social determinants of health
Shaped by the distribution of money, power, and resources throughout local communities, nations, and the world
Vulnerable populations
- More likely to develop health problems as a result of exposure to risk or,
- to have worse health outcomes from these health problems than the rest of the population