NLN PAX PREP Science - Spring 2021

Which of these structures of the male reproductive system carries sperm cells from the testes to the lower part of the abdomen? correct answers Vas deferens A method for determining the blood alcohol content of a subject is to correct answers Use a Breathalyzer A person blows his breath into a straw that is placed in limewater. The limewater becomes cloudy because the person's breath contains correct answers carbon dioxide 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 answers 120/80 mm Hg A student focuses sunlight to a point with a thin converging (convex) lens. Which of these direct measurements can the student make as a result of this experiment? correct answers The approximate focal length of the lens. A woman suddenly chokes on a piece of food and clutches frantically at her throat. An immediate remedy is to correct answers Apply quick, hard pressures successively to her abdomen, just beneath her diaphragm. An unknown gas is denser than air, does not support combustion, and turns a limewater solution cloudy. This gas is most probably correct answers Carbon dioxide Guard cells which can be found in the leaves of plants are most closely associated with which of these processes? correct answers Evaporation of water from the plant. Human testes produce correct answers Spermatozoa If a red light is passed through a dilute solution of chlorophyll solution, the spectrophotometer will detect what amount of transmittance of this light? correct answers 50% - 75% If the medulla of the brain in a human was damaged, which of these conditions would most likely result? correct answers Difficulty in breathing In ecological succession, the first living thing to colonize a hitherto barren area is called A. producer B. primary consumer