Which of the following is involved in the myelination of axons of the central nervous system?
A) microglia
B) astrocytes
C) oligodendrocytes
D) Schwann cells
Answer: C) oligodendrocytes
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The ability of antibodies and complements to enhance phagocytosis is called ________.
A. complement activation B. opsonization C. cell-mediated immunity D. inflammation
. Which hormones are collectively called the gonadotropins?
A. Prolactin and oxytocin B. Antidiuretic hormone and oxytocin C. Follicle-stimulating hormone and luteinizing hormone D. Follicle-stimulating hormone and growth hormone E. Thyroid-stimulating hormone and adrenocorticotropic hormone
Respiratory Distress Syndrome (RDS) is a condition associated with premature babies who lack ________.
A. histamine B. type I alveolar cells C. a-antitrypsin D. surfactant
Which type of muscle tissue causes peristalsis?
A. Skeletal muscle B. Cardiac muscle C. Smooth muscle