A 12-year-old boy was recently diagnosed with asthma, and his primary care provider hasprescribed a corticosteroid to be administered by metered-dose inhaler. This drug achieves a therapeutic effect by which of the following means?

A)By increasing the number of beta-adrenergic receptors
B)By increasing the muscle tone in the smooth muscle of the trachea
C)By increasing the permeability of the alveolar membrane

Tara sees a commercial for a brand of pills that promise to boost energy and people perform better in work and school. as people in the commercial talk about how much better they feel when taking the pill, tara notices a message on the bottom of the screen that reads, "this pill is not approved by doctors and has not been tested in controlled experiments." what is the best conclusion that tara should make about the commercial? it is making scientific claims based on subjective observations. it is making scientific claims based on opinions instead of pseudoscientific facts. it is making pseudoscientific claims based on objective observations. it is making pseudoscientific claims based on opinions instead of scientific facts.

Why do we perceive objects as retaining their brightness under different lighting levels?

Describe the relationship and movement between temperature and density in a convection cell. make sure you identify the direction of travel