Which of the following is not true of areolar tissue?
A. It underlies most epithelial tissues.
B. Leukocytes move freely through the tissue.
C. It is found surrounding blood vessels and nerves.
D. It is avascular.
E. It is highly variable in appearance.
Answer: D
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A patient appears in a clinic complaining of irritability and chronic sweatiness. He also has a lump in his neck near his larynx. Blood tests show he has low levels of thyroid-stimulating hormone (TSH) in his plasma. Which of the following is the most likely diagnosis?
A. Secondary hypothyroidism B. Graves' disease C. Hyposecretion of TRH D. An iodine-insufficient diet E. Primary hypothyroidism
Which of the following statements regarding Ca2+ homeostasis is TRUE?
A. In the absence of parathyroid hormone, plasma Ca2+ levels would be abnormally low, resulting in the hyperpolarization of nerve and muscle membranes. B. Parathyroid hormone directly stimulates Ca2+ absorption from the GI tract. C. When plasma Ca2+ increases above normal, the secretion of parathyroid hormone increases. D. Vitamin D decreases the renal tubular reabsorption of Ca2+. E. Parathyroid hormone directly stimulates Ca2+ reabsorption by the kidneys.
The posterior pituitary secretes _________.
A. prolactin (PRL) B. adrenocorticotropic hormone (ACTH) C. oxytocin (OT) D. thyroid hormone (TH) E. growth hormone (GH)
Cytokines are agents that affect neighboring cells without triggering systemic effects.
Answer the following statement true (T) or false (F)