NLN PAX SCIENCE EXAM QUESTIONS AND ANSWERS ALL CORRECT

NLN PAX SCIENCE EXAM QUESTIONS AND ANSWERS ALL CORRECT 1 Kilogram (kg) of solid X at 10 degree Celsius and 1 kg of solid Y at 10 degree Celsius each absorb 5 joules of heat energy. The final temperature of X and Y are 15 degree Celsius and 20 degree Celsius, respectively. Compared to X, Y must have a lower - CORRECT ANSWER specific heat A person blows his breath into a straw that is placed in limewater. The limewater becomes cloudy because the person's breath contains - CORRECT ANSWER carbon dioxide A person who was in an auto accident has formed a blood clot at the sight of the injury. One event that can lead to the formation of a blood clot is that - CORRECT ANSWER Ruptured platelets release thromboplastin. A physician measures the pulse and blood pressure (BP) of all patients on a routine basis. Which of these measurements show the normal BP values for a resting adult patient? - CORRECT ANSWER 120/80 mmHg A woman suddenly chokes on a piece of food and clutch is frantically at her throat. An immediate remedy is to - CORRECT ANSWER Apply quick, hard pressures successively to her abdomen, just beneath her diaphragm. An unknown gas is more dense than air, does not support combustion, and turns a lime water solution cloudy. This gas is most probably - CORRECT ANSWER Carbon dioxide. In diagnostic testing, the electroencephalogram permits the physician to - CORRECT ANSWER Examine the impulses of the nerve cells within the brain Night blindness in humans is caused by a lack of - CORRECT ANSWER Vitamin A To sterilize a metal probe in the office, a dentist could use a steam sterilizer. If unavailable, the next most effective method to sterilize the instrument would be - CORRECT ANSWER Boiling it in water for 15 minutes In varieties of matter, the term heterogeneous may be applied to - CORRECT ANSWER Mixtures, but not elements or compounds. Iodize salt is used to prevent a human condition known as - CORRECT ANSWER Goiter The bending of a wave around an obstacle is known as - CORRECT ANSWER Diffraction The inherited factors that are transmitted in an organism from generation to generation are called its - CORRECT ANSWER Genotype The organ that filters and metabolic waste from the blood is the - CORRECT ANSWER Kidney The process of nuclear cell division in the cell reproduction of plants differ from mammals. A major difference is that - CORRECT ANSWER Cell plates are synthesized Unicellular organisms that have a nucleus and can swim with the aid of cilia are examples of - CORRECT ANSWER Protozoans Which of these conditions is associated with smoking? - CORRECT ANSWER Emphysema Which of these hydrocarbons is a member of the benzene family? - CORRECT ANSWER Toluene Which of these particles can only be found in the nucleus of an atom? - CORRECT ANSWER Protons and neutrons Which of the sequences of anatomic organizations, from the simplest level to the most complex, is the correct sequence? - CORRECT ANSWER From tissue, organ, organ system to organism Which of these single instruments may be used to measure the current flowing through a circuit? - CORRECT ANSWER An ammeter Which part of the cell structure controls the passage of materials into and out of the cell? - CORRECT ANSWER Plasma membrane Which part of the human central nervous system controls voluntary movement? - CORRECT ANSWER Cerebrum Within which of these structures of the female reproductive tract is a human eggs fertilized? - CORRECT ANSWER Fallopian tube You cut your finger rather deeply while slicing an apple. Which of these action should you take first? - CORRECT ANSWER Wash the wound continuously with cold running water A tincture is solution which - CORRECT ANSWER Alcohol is the solvent A Gram stain is an important technique used in the laboratory that - CORRECT ANSWER Distinguishes between different kind of bacterial cell walls A magician rapidly pulls a tablecloth from the table, leaving the dishes undisturbed. Which of these principles of physics explains this "trick"? - CORRECT ANSWER Objects at rest tends to remain at rest. All the glucose filtered from the blood in the glomerulus into the Bowman's capsule of the kidney nephron is returned to the tissue fluid while passing along the proximal tubule. This rapid return is effected by the process of - CORRECT ANSWER Active transport Energy that is in an object because of its position is called - CORRECT ANSWER Potential energy Enzymes that are involved in biochemical reactions are organic - CORRECT ANSWER Catalysts How much current is drawn by a lightbulb that has a resistance of 100 R with the voltage of 110 V? (V = IR) - CORRECT ANSWER 1.1 amperes In the reaction of Iron with water shown below, what coefficient must be placed before the iron (Fe) to balance the reaction? Fe + 4H2O * Fe3O4 + 4H2 - CORRECT ANSWER 3 Most internal gas exchanges in the human respiratory tract occurs across the capillaries of which of these structures? - CORRECT ANSWER Alveoli