Nerve networks that include both sympathetic and parasympathetic fibers that reach the same structure are called
A) somatic plexuses.
B) somatic ganglia.
C) autonomic plexuses.
D) autonomic ganglia.
E) central plexuses.
C
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Free phagocytes found in the air sacs of the lungs are called
A) alveolar macrophages. B) histiocytes. C) Kupffer cells. D) pleurocytes. E) microglia.
The plicae of the intestinal mucosa, which bears the intestinal villi, are structural features that __________.
a. initiate enterogastric reflexes that accelerate the digestive process b. provide for gastric contractions that churn and swirl the gastric contents c. increase the total surface area for absorption d. stabilize the mesenteries attached to the dorsal body wall
Which enzyme system allows for regulation at a single site and also diminishes the chance that a needed substrate will diffuse away from a catalyst?
A. Multienzyme complex B. Metabolic pathway
Reabsorption in capillaries occurs
a. when blood osmotic pressure plus blood hydrostatic pressure exceed outward-driving forces. b. when blood osmotic pressure plus interstitial fluid osmotic pressure exceed outward-driving forces. c. when blood hydrostatic pressure plus blood osmotic pressure is less than inward-driving forces. d. under conditions a and c e. None of these