HESI A2 PRACTICE TEST 2023 QUESTIONS AND COMPLETE SOLUTIONS GRADED A+

Which structure in the brain is responsible for arousal and maintenance of consciousness? A. The Midbrain B.The Reticular Activating System C. The Diencephalon D. The Limbic System - CORRECT ANSWER B. The Reticular Activating system The triceps reflex - CORRECT ANSWER forces contraction of the triceps and extension of the arm Which cranial nerve is responsible for hearing and balance? A. CN III B. CN V C. CN VII D. CN XII - CORRECT ANSWER C. CN VIII Which gland is responsible for the regulation of calcium levels? A. Parathyroid B. Pituitary C. Adrenal D. Pancreas - CORRECT ANSWER A. Parathyroid Which hormone is predominantly produced during the luteal phase of the menstrual cycle? - CORRECT ANSWER Progesterone The pancreas secretes what hormone in response to low blood glucose levels? A. Insulin B. Glucagon C. Somatostatin D. Amylase - CORRECT ANSWER B. Glucagon Which layer of the heart contains striated muscle fibers for contraction of the heart? A. Pericardium B. Epicardium C. Endocardium D. Myocardium - CORRECT ANSWER D. Myocardium Which part of the cardiac conduction system is the most distal from the initial impulse generation and actually conducts the charge throughout the heart tissue? A. SA B. AV C. Purkinje Fibers D/ Bundle of His - CORRECT ANSWER C. Purkinje Fibers Which blood vessel carries oxygenated blood back to the heart? - CORRECT ANSWER Pulmonary vein Which granulocyte is most likely to be elevated during an allergic response? A. Neutrophil B. Monocyte C. Eosinophil D. Basophil - CORRECT ANSWER Eosinophil Which vitamin is essential for proper formation of clotting factors? - CORRECT ANSWER Vitamin K Afferent lymph vessels carry lymph: A. Toward the spleen B. Away from the spleen C. Toward the lymph node D. Away from the lymph node - CORRECT ANSWER C. Toward the lymph node Cricoid cartilage is found on the : A. Alveoli B. Bronchioles C. Bronchi D. Trachea - CORRECT ANSWER D. Trachea Which of the following is NOT found in mediastinum? A. Xiphoid process B. Thymus C. Trachea D. Vagus nerve - CORRECT ANSWER A. Xiphoid process What is the proper order of the divisions of the small intestine as food passes through the gastrointestinal tract? A. Ileum, duodenum, jejunum B. Duodenum, ileum, jejunum C. Duodenum, jejunum, ileum D. Ilem, jejunum, duodenum - CORRECT ANSWER C. Duodenum, jejunum, ileum Which chemicals are responsible for conveying an impulse along a nerve cell? - CORRECT ANSWER Sodium and potassium Which type of genetic mutation occurs when a piece of DNA breaks off the chromosome and attaches to a different chromosome? - CORRECT ANSWER Translocation What is the first line of defense against invading bacteria? - CORRECT ANSWER The skin What is the purpose of capping the 5' end of mRNA? - CORRECT ANSWER To protect the end of the strand from degradation During what process does hydrolysis occur to provide electrons to chlorophyll, which subsequently absorb energy? A. Light-dependent reactions of photosynthesis B. Light-independent reactions of photosynthesis C. Calvin cycle D. Krebs cycle - CORRECT ANSWER A. Light-dependent reactions of photosynthesis