NLN PAX RN Science Questions and Answers Rated A

NLN PAX RN Science Questions and Answers Rated A 1 kilogram (kg) of solid X at 10°C and 1 kg of solid Y at 10°C each absorb 5 joules of heat energy. The final temperatures of X and Y are 15°C and 20°C, respectively. Compared to X, Y must have a lower A) specific heat B) conductive heat C) heat of fusion D) heat of vaporization A) specific heat A drop of dilute ammonium hydroxide (NH4OH) is placed on one side of a slide containing a large number of swimming paramecium. Under this condition, which of these behaviors of the paramecium will be observed? A) They will eventually all swim toward the ammonium hydroxide B) They will show no net change in behavior to the ammonium hydroxide C) They will all be instantly killed by the ammonium hydroxide D) They will eventually all swim away from the ammonium hydroxide D) They will eventually all swim away from the ammonium hydroxide A person blows his breath into a straw that is placed in limewater. The limewater becomes cloudy because the person's breath contains A) carbon dioxide B) hydrogen C) oxygen D) nitrogen A) carbon dioxide A person who was in an auto accident has formed a blood clot at the site of the injury. One event that can lead to formation of a blood clot is that A) red blood cells release hemoglobin B) bone marrow cell decrease platelet production C) white blood cells release antibodies D) ruptured platelets release thromboplastin D) ruptured platelets release thromboplastin An unknown gas is more dense than air, does not support combustion, and turns a limewater solution cloudy. This gas is most probably A) ammonia B) methane C) carbon dioxide D) hydrogen C) carbon dioxide Human testes produce A) eggs B) follicle stimulating hormone C) growth hormone D) spermatozoa D) spermatozoa If the medulla of the brain in a human was damaged, which of these conditions would most likely result? A) inability to remember B) difficulty in breathing C) inability to speak D) blurred vision B) difficulty in breathing In ecological succession, the first living thing to colonize a hitherto barren area is called a A) producer B) primary consumer C) pioneer organism D) carnivore C) pioneer organism Night blindness in humans is caused by a lack of A) Vitamin A B) Niacin C) Calcium D) Vitamin D A) Vitamin A Iodized salt is used to prevent a human condition known as A) rickets B) goiter C) scurvy D) beri-beri B) goiter The inherited factors that are transmitted in an organism from generation to generation are called its A) homozygote B) heterozygote C) genotype D) phenotype C) genotype The organ that filters metabolic waste from the blood is the A) small intestine B) liver C) kidney D) stomach C) kidney Which of these conditions is associated with smoking? A) esophageal varices B) tonsillitis C) emphysema D) blindness C) emphysema Which of these equations best illustrates a synthesis reaction? A) 2Na + Cl2 —> 2NaCl B) NaOH + HCl —> NaCl + H2O C) 2H2O2 —> 2H2O + O2 D) CH4 + 2O2 —> CO2 + 2H2O A) 2Na + Cl2 —> 2NaCl Which of these hydrocarbons is a member of the benzene family? A) toluene B) ethyne C) propanone D) methanol A) toluene Which of these organisms use nitrogen directly from the air? A) blue-green algae B) protozoa C) plants D) worms A) blue-green algae Which of these pairs of units measures the sam