Question

most respiratory infections are caused by bacteria.

1. true
2. false

question 17 (2.5 points)
a group of symptoms sometimes exhibited prior to the menstrual cycle is called
pre - menstrual syndrome
endometriosis
amenorrhea
dysmenorrhea

Explanation:

1. Most respiratory infections are caused by viruses, not bacteria.
2. Premenstrual syndrome refers to a group of symptoms prior to the menstrual cycle. Endometriosis is the growth of uterine - lining tissue outside the uterus. Amenorrhea is the absence of menstruation. Dysmenorrhea is painful menstruation.

Answer:

1. False
2. premenstrual syndrome