名词dilation/dilatation的动词形式是______.

The membranous area of urethra is . A: first narrow B: secondary narrow C: third narrow D: dilation area

Which of the following is promoted by parasympathetic activity? A: Airway constriction B: Ejaculation 射精 C: Pupillary dilation D: Vasoconstrictor response to hemorrhage E: Secretion of sweat

Series 2 prostaglandins have important roles in the immediate response to stress or injury, including _____________________. A: inflammation B: pain C: swelling D: dilation of blood vessels