Immune and GI systems Flashcards
(210 cards)
What is the primary central gland of the immune system?
thymus
produces lymphocytes (primary immune cells)
(true/false) The thymus is not fully developed until puberty.
FALSE - thymus is fully developed at birth and then reaches maximal size at puberty
Decreases in size and is slowly replaced by adipose tissue as a person ages.
What is the function of the spleen?
- Filters antigens from the blood
- produces leukocytes, monocytes, lymphocytes, and plasma cells in response to infection
- Produces RBC and WBC while in embryo
Only produces lymphocytes after birth unless severe anemia exists
definition
Classification of diagnoses characterized by immune system responses directed against the body’s normal tissues; self-destructive processes impair the body functioning
autoimmune diseases
What is HIV?
A virus that weakens the immune system and destroys cells that fight disease and infection
- CD4+ helper cells, resulting in CD4+ T lymphocytopenia (major immune system defect)
What are the stages of HIV?
Stage 1: flu-like illness within 2-4 wks after exposure/infection
stage 2 (clinical latency): asymptomatic HIV infection or chronic HIV infection that can last a decade or longer
Stage 3 (AIDS): most severe phase; mass destruction of cells resulting in the immune system not being able to fight off disease or illness
How is HIV spread?
Body fluids
Rare: during pregnancy, birth, or breastfeeding
(true/false) HIV can be transmitted through saliva, tears or sweat.
FALSE (unless blood is present)
(true/false) AIDS can be contracted through respiratory inhalation, skin contact, or human waste
FALSE
What is the regular range of CD4?
500-1200 cells/mm
What is used to diagnose AIDS?
- CD4 cell count < 200 cells/mm or if they develop opportunistic illnesses - have a high viral load and are very infectious
- presence of acute symptoms secondary to immune system deficiency (AIDS-Related Complex (ARC))
What is AIDS-related complex (ARC)?
presence of acute symptoms secondary to immune system deficiency
What are the s/s of HIV?
- flu-like symptoms that resolve within a few weeks
(true/false) Getting tested is the only way to diagnose HIV.
true
What are the s/s of AIDS?
- presence of opportunistic infections
- malignancies
- neural conditions
- deconditioning
- anxiety and depression
What opportunistic infections that are considered as AIDS-defining conditions?
- PNA
- candidiasis
- cytomegalovirus
- toxoplasmosis
What is the most common malignancy caused by AIDS?
Kaposki’s sarcoma and non-hodgkins lymphoma
What neuro conditions can be seen with AIDS?
- AIDS dementia complex
- focal encephalitis
- meningitis
- herpes zoster
(true/false) Some patients with AIDS may exhibit a brief, early, nonspecific viral HIV infection and then remain asymptomatic for years.
True
(true/false) antibiotics cure HIV infections
FALSE (no cure for HIV)
Those with HIV will progress to having ____ if not treated.
AIDS
What medication does not cure HIV but does keep those with HIV healthy for many years if taken consistently and correctly?
Antiretroviral therapies (ARTs)
Antiviral drugs reduce the amount of virus (viral load) in the system
What does a retrovirus do?
Replicates in reverse fashion (RNA code is transcribed into DNA)
What are common side affects of ARTs?
- N/V
- diarrhea
- HA
- dizziness
- fatigue
- pain
- rash