The Circulatory, Respiratory, Digestive, and Excretory Systems Chapter 21, 22 &
ID: 257867 • Letter: T
Question
The Circulatory, Respiratory, Digestive, and Excretory Systems Chapter 21, 22 & 23 Date Multiple Choice Circle the letter of the correct choice. 1. Blood from the body enters the heart's right atrium. right ventricle. left atrium. c. d. left ventricle. 2. Electrical impulses that stimulate heart contractions come from a. the cerebrum. b. the brain stem. c. nerves in the spinal cord. d. specialized cardiac cells. 3. Pulmonary circulation carries blood between the a. heart and body. b. body and lungs. lungs and heart. c. d. heart and head. 4. The process of moving air into and out of the lungs is called a. gas exchange. b. gas transport. c. ventilation. d. respiration. What happens when the diaphragm contracts? a. The volume of the chest decreases. b. The ribcage expands. c. The contents of the abdomen move upward. d. Air rushes out of the lungs. 5. Organs of the gastrointestinal tract include a. the pancreas. 6. b. the gall bladder. c. the stomach. d. all of the aboveExplanation / Answer
Answer 1 a] blood from body enters in Right atrium of heart via vena cava [ largest vein]
Answer 2 d] specialized cardiac cell [those are SA node also known as pacemaker]
Answer 3 C] lungs and heart [ pulmonary vein carries blood from lungs to heart while pulmonary artery carry blood from heart to lung]
Answer 4 D] respiration as respiration is the process of taking air into lung and out of lung.
Answer 5 B] ribcage expand on diaphragm contraction also air is intake, chest expand.
Answer 6 C] gastrointestinal includes only intestines [ small and large inestine] and stomach