HESI A2 Biology practice Questions & Answers: Guaranteed A+ Guide: Latest Updated

Which of the following is NOT a part of the body's chemical defense system against infection? a. Urine b. Hydrochloric acid c. Agranulocyte d. Lysozyme (Ans – - Agranulocytes Agranulocytes are a type of white blood cell and therefore are not a part of the body's chemical defense system. Which of the following is considered an example of naturally acquired passive immunity? a. Attenuated (live) vaccine injection b. Breastfeeding c. Inactivated (killed) vaccine injection d. Exposure to a disease and subsequent immunity (Ans – - breastfeeding Natural passive immunity occurs when live antibodies are transferred from one individual to another, such as when anti-bodies are transferred from a mother to her baby via breast milk. Worms lack which of the following? a. Eyes and brain b. Brain c. Eyes d. Nerve centers(Ans - - eyes and brain Worms lack both eyes and a brain, but they do have nerve centers. Which organelle is responsible for generating ATP that is used for chemical energy? a. Mitochondria b. Vesicle c. Ribosome d. Golgi apparatus (Ans - - mitochondria The mitochondrion is often referred to as the "power plant" of the cell, because it generates ATP, the cell's source of chemical energy. Which of the following is true with regard to eukaryotic and prokaryotic cells? a. Prokaryotic cells can contain lysosomes. b. Eukaryotic cells have mitochondria. c. Prokaryotic cells can contain lysosomes and eukaryotic cells have mitochondria. d. Prokaryotic cells have a nucleus. (Ans - - Eukaryotic cells have mitochondria. One of the major differences between eukaryotic cells and prokaryotic cells is that eukaryotic cells contain organelles, such as mitochondria, whereas prokaryotic cells do not. Positive feedback is a mechanism used by the body that results in amplification or enhancement of a signal that has already been activated. An example of this would be: a. Slowing metabolism in response to starvation b. Shivering to increase temperature c. Blood vessels regulating blood