ATI TEAS TEST Science Questions and Answers The upper respiratory system includes: nose, mouth, nasal cavity, pharynx, larynx The lower respiratory system includes: trachea, lungs, bronchial tree How many major organ systems are there? 11 How long does the cell cycle take? 24 hours What are the lungs surrounded by? pleural membrane Which gland is responsible for regulation of calcium levels? a. The parathyroid glands b. The pituitary gland c. The adrenal glands d. The pancreas a. the parathyroid glands 5 functions of the respiratory system 1. supply the body w/ oxygen and get rid of carbon dioxide 2. filters air 3. responsible for speech 4. sense of smell 5. maintain acid-base homeostasisWhat contracts during the breathing process? a. lungs and diaphragm b. intercostal muscles and lungs c. diaphragm and intercostal muscles d. lungs and alveoli c. diaphragm and intercostal muscles What expands during inspiration/inhalation? the ribs What increases in size during inspiration/inhalation? chest cavity What part of the brain stem controls the breathing process? a. pons b. hypothalamus c. medulla oblongata d. midbrain c. medulla oblongata 3 components of the circulatory system 1. blood 2. heart 3. blood vessels Three layers of the walls of all blood vessels (except