What is the role of endorphins during continuous exercise? a. they increase the body’s basal metabolic rate. b. they lower blood cholesterol levels. c. they allow the heart to pump more blood with less effort. d. they block pain messages from reaching brain cells.

 They block pain messages from reaching brain cells.

Explanation: Endorphins are known as natural pain revilers produced by one of our organ called pituitary gland. They are often released during exercise, moments of excitement and distress. Referring to the question, the role of endorphins is to block pain messages from reaching brain cells and soothes any pain or distress caused during exercise

Air goes past the epiglottis and into the trachea when you breathe in. from there, it goes to your vocal cords in the larynx until it reaches the bronchi. from the bronchi, air passes into each lung.