The circle of willis, the superficial palmar arch, and the mesenteric arches are all what.
A- branches of the thoracic aorta
B- component of the hepatic portal system
C- anastomoses
D- venules
Answer: C- anastomoses
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The epithelial linings of the respiratory and digestive systems develop from the
A. ectoderm. B. endoderm. C. mesoderm. D. lumenoderm.
The most important factor in decreasing the intracellular concentration of calcium ion after contraction is
A) Active transport of calcium across the sarcolemma. B) Active transport of calcium into the sarcoplasmic reticulum. C) Active transport of calcium into the synaptic cleft. D) Diffusion of calcium out of the cell. E) Diffusion of calcium into the sarcoplasmic reticulum.
Which gland does NOT synthesize the hormone(s) listed?
A. pineal gland: melatonin B. anterior pituitary: growth hormone, thyroid-stimulating hormone, follicle-stimulating hormone, prolactin, adrenocorticotropic hormone, luteinizing hormone C. thyroid gland: thyroxine, triiodothyronine, calcitonin D. posterior pituitary: oxytocin and anti-diuretic hormone E. adrenal cortex: mineralocorticoids, glucocorticoids, androgens
If two cranial bones are joined by overlapping beveled edges they are adjoined by which type of suture?
A. Lap B. Serrate C. Butt D. Plane