HESI A2 Practice Questions with Correct Answers

1) Which of the following describes the primary function of the respiratory system? A) to create sound and speech B) to take oxygen into the body while removing carbon dioxide C) to transport nutrients to the cells and tissue of the body D) to act as a barrier between the body's organs and outside influences - Answer-to take oxygen into the body while removing carbon dioxide 2) Which of the following is the first step of the scientific method? A) construct a hypothesis B) make observations C) analyze data D) form a question - Answer-make observations 3) The process of organisms with an advantageous trait surviving more often and producing more offspring than organisms without the advantageous trait describes which of the following basic mechanisms? A) gene flow B) genetic drift C) mutation D) natural selection - Answer-natural selection 4) Which of the following is the group of basophils that produces follicle-stimulating hormone (FSH) and luteinizing hormone? A) gonadotrophs B) thyotroph C) chromophil D) pituicytes - Answer-gonadotrophs 5) Which of the following are considered the basic units of the female reproductive system, each containing a single immature egg cell that is released during ovulation? A) oocytes B) follicles C) ovaries D) fundus - Answer-follicles