Histamine and leukotrienes are released from
A. basophils and mast cells.
B. eosinophils and basophils.
C. neutrophils and lymphocytes.
D. macrophages and microphages.
E. phagocytes.
A
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Which of the following has the highest concentration of hydroxide ions?
A) pH 1 B) pH 14 C) pH 7 D) pH 10 E) pH 2
Somatic and visceral reflex arcs are similar, but visceral reflex arcs lack afferent fibers (visceral sensory neurons)
Indicate whether the statement is true or false
Cerebrospinal fluid
a. is formed by the choroid plexuses b. is formed by the arachnoid villi c. separates the blood and brain to form the blood-brain barrier d. is formed only in the ventricles of the cerebrum e. enters the blood at the choroid plexuses
All of the following are veins of the lower limbs EXCEPT the ________
A) external iliac vein B) fibular vein C) popliteal vein D) hepatic veins