How will a punctured lung affect your ability to inspire?

a. air pressure is unable to increase, and lung volume cannot decrease
b. air pressure is unable to decrease, and lung volume cannot increase
c. air pressure is unable to increase, and lung volume cannot increase
d. air pressure is unable to decrease, and lung volume cannot decrease

which substance is responsible for increasing ventilation & dilation of your respiratory tract?

a. epinephrine
b. acetylcholine
c. alveolar sacs
d. surfactant

which digestive chemical triggers the liver to release bile into the digestive system?

a. gastrin
b. secretin
c. acetylcholine
d. adrenaline

20 point pls brianliest 1. what does a red shift mean? blue shift? 2. describe the big bang theory. according to this theory, how old is the universe? 3. scientists believe the universe is expanding. what is the evidence that supports this? 4. describe a nebula. 5. describe the 3 types of galaxies. what is a barred spiral galaxy? 6. what is a light year? how far is alpha centauri from earth? 7. describe the universal law of gravitation. be sure to include gravitational force between two objects. 8. describe the planets’ orbits around the sun. 9. what is the asteroid belt? where is it located? 10. describe rotation and revolution of earth. what determines an earth day and year? 11. how do galaxies exist? 12. compare and contrast the inner and outer planets. 13. what causes the seasons?