Which of the following is true about mucous lining the organs in the respiratory tract? A:Mucous is present only when a person has a severe respiratory infection. B:Mucous allows pathogens to enter the lungs quickly in order to enter the bloodstream. C:Mucous is not found in the respiratory tract. D:Mucous protects the organisms from pathogens that might be inhaled.

As you sit in the library with your friend studying for your weekly quiz on the integumentary system, you come upon an article about the hazards of prolonged exposure to the sun's rays. your curious nature leads you to research the subject further. you're fascinated to learn that minimal exposure to the sun allows you skin to manufacture vitamin d, which is important to maintain homeostasis. you also read that although sunscreen can protect you from the ultraviolet (uv) rays of the sun, some medications can actually increase a person's sensitivity to the sunlight.

An _ exposure is a repeated or prolonged exposure(over months or years) that may bring about slowly developing symptoms.

The physician ordered velosef (cephradine) im 50 mg/kg/day in equally divided doses four times a day for a child who weighs 40 pounds. convert pounds to kilograms and then calculate the prescribed dosage. mg every hours