Midterm Flashcards
What information is contained within the nucleolus?
RNA, DNA, binding proteins (Histones)
The function of proteins?
Act as receptors, transport channels, drive active pumps, cell surface markers, cell adhesion markers (CAMs), catalysts of chemical reactions, role in ATP
Why are water-soluble molecules unable to center cells?
Phospholipid bilayer
Refractory period?
No stimulus can evoke another response at that time?
when normal columnar ciliated epithelial cells of the bronchial lining are replaced by stratified squamous epithelial cells due to chronic irritation
Metaplasia
During pregnancy, mammary glands enlarge. What type of hormonal process causes this?
Hyperplasia - increase in cell amount, does not affect shape/size of cells
A consequence of multiple blood transfusions for the patient.
Hemosiderosis - excess iron stored as hemosiderin in tissues/organs
What is the physiological effect of hypernatremia?
High Na in blood vessels pulls H2O out of cells (ex brain) and into the blood vessels causing cells to shrink.
What condition consists of an absent homologous X chromosome with a single X chromosome and physical features of the following: Short stature, widely spaced nipples, webbed neck?
Turners syndrome
which blood type is that of a heterozygous having A & B alleles as a codominant?
Blood type AB
Of the genetic processes, which can cause asthma in only one pair of identical twins
epigenetic modifications
Which cell is the primary defense against parasites
Eosinophils
Why do complement and chemotaxis deficiencies occur in neonates?
Transient depressed inflammatory response - born in sterile environment, neutrophils/monocytes not yet capable of effective chemotaxis making them prone to infection
Why are some vaccines administered orally vs injected?
Each route stimulates a different lymphocyte containing tissues resulting in a different type of cellular and humoral immunity
If a patient is having an IgE-mediated hypersensitivity reaction, what is the best intervention?
Antihistamines
Mechanisms of type II hypersensitivity reaction
- Tissue-specific
- Antibodies (IgG/IgM) coat mast cells by binding to receptors that signal its degranulation, followed by a discharge of preformed mediators
Rh- Mom delivers a Rh+ baby, what would you tell mom about RHO(D) immunoglobulin
prevents alloimmunity and hemolytic anemia of the newborns
Neutrophils attack, engulf, and destroy which microorganism using phagocytosis?
Bacteria
What are exotoxins
Released by bacteria during bacterial growth and affect surround tissues
Immunity decreases during stress. The helper T cell response to stress is suppressed by which hormone makes them prone to infection?
Cortisol
Which neurotransmitter causes a patient that is severely stressed to develop cold clammy skin.
Norepinephrine - causes vasoconstriction
What percentage of intravascular volume needs to be decreased before hypovolemic shock occurs?
15%
what is the hallmark of neurogenic shock due to overstimulation of the parasympathetic nervous system?
Vasodilation d/t low SVR
Which of the following shock states has the highest priority to treat?
a. septic
b. hypovolemia
c. anaphylactic
d. neurogenic
Anaphylactic - concern for airway
During septic shock which clinical finding confirms the elevation of the immune response?
Leukocytosis - Increased WBCs
periorbital edema and hepatomegaly occur in pediatric cardiogenic shock due to?
Increased systemic venous congestion from high SVR
true or false: Capillary refill greater than 4 seconds is normal in a child
False - sign of shock
The primary goal of shock in a child?
Maximize O2 delivery, decrease demand.
Limited glycogen storage of a child that has been seriously burned results in what outcome?
Increased morbidity - limited glycogen makes it hard to meet the increased energy demands of the burn leading to metabolic dysfunction and loss of lean body mass
Which of these behaviors would be observed in a newborn suffering shock? SATA:
a. Decreased heart variability
b. hyperalertness
c. hypoglycemia
d. temperature instability
e. increased muscle tone
A. decreased heart variability
C. hypoglycemia
D. temperature instability
How does a child physiologically compensate for cardiogenic shock?
- splanchnic arteries are constricted to divert blood from the skin, kidneys, and gut to the heart and brain
- Peripheral blood vessels are constricted to raise blood pressure
- Adrenergic responses produce tachycardia to increase CO
- The RAAS system is stimulated when renal function decreases
what tissue does carcinoma originate?
Epithelial
When a cell loses cellular differentiation, it is referred to as?
Anaplasia - hallmark of CA
A pts in your office with a known diagnosis of CA and their labs show hgb of 7.9. what factors will you assess for? SATA:
a. chronic bleeding
b. malabsorption of iron
c. malnutrition
d. recent blood transfusion
e. current infection
a. chronic bleeding
b. malabsorption of iron
c. malnutiriton
You are tasked with developing a series of community discussions related to CA prevention strategies. Which of these topics do you choose? SATA:
a. healthy eating
b. tobacco avoidance
c. importance of early diagnosis
d. impact of obesity on one’s health
e. age-appropriate exercise
a. healthy eating
b. tobacco avoidance
d. impact of obesity on health
e. age appropriate exercise
Which form of CA is linked to congenital malformation syndrome?
Wilms tumor (nephroblastoma)
a child that is diagnosed with aids, has an increased risk of developing …?
Non-Hodgkin’s lymphoma
which cells can destroy some types of tumor cells and some viruses infected cells without having been exposed to them before?
Natural killer cells