PSL Exam with 100% correct solutions 2024

Organelles are not listed as one of the levels of organization of life. Can you put forth a logical argument for why they are not part of the hierarchy of life? correct answers Organelles are structures within cells. They develop within cells after cells are made from molecules and therefore do not exist prior to the existence of cells as stand-alone structures. One reductionist is studying the skeletal system and another the cardiovascular system. What emergent properties (i.e., functions that are only present when both systems work together in an integrated fashion) might both of these individuals be unable to identify in their respective systems? correct answers One emergent property between the skeletal and cardiovascular systems is the blood calcium homeostasis. In addition, the skeletal system is also the site for hematopoiesis (i.e., the production of blood cells found in your cardiovascular system). Therefore, if these two systems are studied separately, these integrated physiological functions will likely not be identified. Many individuals erroneously say that the heart is located inside the pericardial cavity. How would you correctly describe the heart in relation to the pericardial cavity? How does the pericardial sac fit into this picture? correct answers The pericardial cavity surrounds the heart and contains the serous fluid. The pericardial sac surrounds the pericardial cavity and protects the heart. What is a mesentery? What are its functions? correct answers a. Mesentery - double layer of visceral peritoneum. b. Functions - organ support, communication link between the external and internal environment, decrease friction, organ movement. They contain blood vessels that supply nutrients to the digestive tract and also bring nutrients from the digestive tract to the body proper. They also contain nerves that are required for proper functioning of the digestive tract. Total body water in a female is approximately 35 liters. Where is the vast majority of this water located in the female body? correct answers The intracellular compartment (i.e., inside all of your cells - intracellular fluid). During high intensity exercise, you can easily lose 1 liter of water per hour of exercise. Let's say a man lost 5 liters of water during one workout. How many cups of water would he have to drink to replace this volume of water lost? correct answers 20 cups. An alien was discovered to vasoconstrict in response to an increase in its body temperature. Is this response human-like? In other words, is this a negative or positive feedback response? How do you know? correct answers An increase in body