631. HIV infection
A. Is caused by rhinovirus
B. Results in increased CD4 and T cell memory
C. Results in inversion at the CD4-CDg ratio
D. Increases immature precursors of CD4 and T cells
E. Causes a CD4-CDg ratio close to 2

632. A typical feature of AIDS
A. Decreased delayed type hypersensitivity reaction
B. Lymphocytosis
C. Hypogammaglobulinaemia
D. Increase CD4 and T cells
E. Increase chemotaxis and phagocytosis

633. In reversible cell injury, all are true except
A. ATP depletion is responsible for acute cellular swelling
B. Can cause myocardial cells to cease contraction within 60 seconds
C. ATP is generated anaerobically from creatine phosphate
D. Mitochondrial swelling and degranulation ofER are the hallmarks of irreversible cellular damage
E. Is associated with myelin figures

634. Metaplasia
A. Is irreversible
B. Is commonly a change from squamous to columnar epithelium
C. An example is the transformation of epithelial cells into chondroblasts to produce cartilage
D. Retinoids may playa role
E. Even if the stimuli is persistent, it is a benign lesion

635. In apoptosis
A. It involves physiologic and pathologic stimuli
B. Histologically, it involves coagulation necrosis
C. Its DNA breakdown is random and diffuse
D. Its mechanism involves ATP depletion
E. It involves an inflammatory tissue reaction

636. Hyperplasia
A. Occurs after partial hepatectomy
B. Refers to an increase in the size of cells
C. Is always a pathologic process
D. Often occurs in cardiac and skeletal muscle
E. Usually progresses to cancerous proliferation

637. Metastatic calcification
A. Causes widespread tissue damage
B. Occurs with normal calcium levels
C. Can be caused by systemic sarcoidosis
D. Occurs in hypothyroidism
E. Is caused by drinking large quantities of milk

638. Mumps virus is a
A. Adenovirus
B. Herpes virus
C. Paramyxovirus
D. Pox virus
E. Picornavirus

639. Prothrombotic characteristics of endothelium include
A. Plasminogen activator
B. Prostacyclin
C. von Willebrand factor
D. Thrombomodulin
E. Heparin like molecules

640. Regarding giant cell arteritis, which statement is not correct
A. Affects medium arteries
B. Affects small arteries including vertebral
C. Affects small arteries including ophthalmic
D. Has an increased prevalence ofHLA-D
E. Has no gastrointestinal manifestations