47 ! need correct ! which occurs during an asthma attack? a. the lining of the airways becomes swollen. b. mucous dries up. c. the airways in the lungs are wide open. d. all of the above.

A. The lining of airways become swollen

^^^That's why people start coughing a lot. Air is trying to get through the airways and past all the EXTRA mucous that gets produced (the mucous does NOT dry up)

Hope this helped!

~Just a girl in love with Shawn Mendes

the answer is tropical areas. the tropical areas obtain more

radiant energy from the sun than they lose to space through terrestrial

radiation, and vice versa for polar areas. earth has an energy remaining in the

tropics and an energy scarcity for the polar areas.

explanation:

"menstrual cycle is a complex cycle that consists of several processes. order of occurrence of steps in menstrual cycle are as follows:

1. high progesterone levels maintain the endometrium lining of the uterus.

2. endometrium lining breaks down and low levels of estrogen stimulate the pituitary to release fsh and lh.

3. fsh and lh stimulates the follicles to develop and the oocyte to produce estrogen.

4. rising estrogen levels suppress fsh production and development of other follicles.

5. a spike in lh causes follicle to rupture.

6. a breakdown of corpus luteum causes progesterone level to drop."