NLN PAX PREP Science - Spring 2021 (correct answers)
Which of these structures of the male reproductive system carries sperm cells from the
testes to the lower part of the abdomen?correct answersVas deferens
A method for determining the blood alcohol content of a subject is tocorrect answersUse
a Breathalyzer
A person blows his breath into a straw that is placed in limewater. The limewater
becomes cloudy because the person's breath containscorrect answerscarbon 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 answers120/80 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
answersThe 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 tocorrect answersApply 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 probablycorrect answersCarbon dioxide
Guard cells which can be found in the leaves of plants are most closely associated with
which of these processes?correct answersEvaporation of water from the plant.
Human testes producecorrect answersSpermatozoa
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
answers50% - 75%
If the medulla of the brain in a human was damaged, which of these conditions would
most likely result?correct answersDifficulty in breathing
In ecological succession, the first living thing to colonize a hitherto barren area is called
A. producer
B. primary consumer
C. pioneer organism
D. carnivorecorrect answersPioneer organism
In varieties of matter, the term heterogeneous may be applied tocorrect
answersMixtures, but not elements or compounds
The inherited factors that are transmitted in an organism from generation to generation
are called its Homozygote.correct answersGenotype
The organ that filters metabolic waste from the blood is the
Small intestine.correct answerskidney
Unicellular organisms that have a nucleus and can swim with the aid of cilia are
examples of Monerans.
A. monerans
B. plants
, C. fungi
D. protozoanscorrect answersprotozoans
Which of these conditions is associated with smoking?correct answersEmphysema
Which of these organisms use nitrogen directly from the air?correct answersBlue-green
algae.
Which of these particles can only be found in the nucleus of an atom?correct
answersprotons and neutron
Which of these processes is responsible for the recorded production of CO2 by yeast
cells from sugar solution?correct answersAnaerobic respiration
Which of these quantities is a vector quantity?correct answersEnergy
Which of these temperatures is known as Absolute Zero?correct answersO ° K
While working in the chemistry laboratory, a student spills dilute hydrochloric acid on her
hand.
What is the first action this student should take?correct answersFlush her hand with
large quantities of water.
Within which of these structures of the female reproductive tract is the human egg
fertilized?correct answersFallopian tube
A cell which manufactures a large amount of protein for export would have an
abundance of organelles calledcorrect answersRibosomes
A substance that increases the speed of a reaction by lowering its activation energy is
calledcorrect answersA catalyst
All of these groups of land plants produce seeds EXCEPT
A. perennial flowering plants, such as peonies and asters.
B. deciduous trees, such as maple and oaks.
C. moist forest plants, such as mosses and ferns.
D. evergreen trees, such as pines and spruces.correct answersmoist forest plants, such
as mosses and ferns
(NOTE: "Evergreen trees, such as pines and spruces" is NOT the right answer even
though NLN practice test says so!)
As part of the human immune response, which of these cells are responsible for
producing antibodies?correct answersLymphocytes
Ductless glands in the human body secretecorrect answersHormones
Ganglia are made up of a cluster ofcorrect answersneurons
If a person is fasting for 24hrs and ingest no carbohydrates the liver will provide for the
body's need bycorrect answersConverting glycogen into glucose
If all of the second-order consumers within an ecosystem of a region were removed, the
most likely short-term effect would becorrect answersAn increase in the number of first-
order consumers
In a study on the effect of cocaine on the brains of rats, two groups of animals were
selected.
Which of these structures of the male reproductive system carries sperm cells from the
testes to the lower part of the abdomen?correct answersVas deferens
A method for determining the blood alcohol content of a subject is tocorrect answersUse
a Breathalyzer
A person blows his breath into a straw that is placed in limewater. The limewater
becomes cloudy because the person's breath containscorrect answerscarbon 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 answers120/80 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
answersThe 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 tocorrect answersApply 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 probablycorrect answersCarbon dioxide
Guard cells which can be found in the leaves of plants are most closely associated with
which of these processes?correct answersEvaporation of water from the plant.
Human testes producecorrect answersSpermatozoa
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
answers50% - 75%
If the medulla of the brain in a human was damaged, which of these conditions would
most likely result?correct answersDifficulty in breathing
In ecological succession, the first living thing to colonize a hitherto barren area is called
A. producer
B. primary consumer
C. pioneer organism
D. carnivorecorrect answersPioneer organism
In varieties of matter, the term heterogeneous may be applied tocorrect
answersMixtures, but not elements or compounds
The inherited factors that are transmitted in an organism from generation to generation
are called its Homozygote.correct answersGenotype
The organ that filters metabolic waste from the blood is the
Small intestine.correct answerskidney
Unicellular organisms that have a nucleus and can swim with the aid of cilia are
examples of Monerans.
A. monerans
B. plants
, C. fungi
D. protozoanscorrect answersprotozoans
Which of these conditions is associated with smoking?correct answersEmphysema
Which of these organisms use nitrogen directly from the air?correct answersBlue-green
algae.
Which of these particles can only be found in the nucleus of an atom?correct
answersprotons and neutron
Which of these processes is responsible for the recorded production of CO2 by yeast
cells from sugar solution?correct answersAnaerobic respiration
Which of these quantities is a vector quantity?correct answersEnergy
Which of these temperatures is known as Absolute Zero?correct answersO ° K
While working in the chemistry laboratory, a student spills dilute hydrochloric acid on her
hand.
What is the first action this student should take?correct answersFlush her hand with
large quantities of water.
Within which of these structures of the female reproductive tract is the human egg
fertilized?correct answersFallopian tube
A cell which manufactures a large amount of protein for export would have an
abundance of organelles calledcorrect answersRibosomes
A substance that increases the speed of a reaction by lowering its activation energy is
calledcorrect answersA catalyst
All of these groups of land plants produce seeds EXCEPT
A. perennial flowering plants, such as peonies and asters.
B. deciduous trees, such as maple and oaks.
C. moist forest plants, such as mosses and ferns.
D. evergreen trees, such as pines and spruces.correct answersmoist forest plants, such
as mosses and ferns
(NOTE: "Evergreen trees, such as pines and spruces" is NOT the right answer even
though NLN practice test says so!)
As part of the human immune response, which of these cells are responsible for
producing antibodies?correct answersLymphocytes
Ductless glands in the human body secretecorrect answersHormones
Ganglia are made up of a cluster ofcorrect answersneurons
If a person is fasting for 24hrs and ingest no carbohydrates the liver will provide for the
body's need bycorrect answersConverting glycogen into glucose
If all of the second-order consumers within an ecosystem of a region were removed, the
most likely short-term effect would becorrect answersAn increase in the number of first-
order consumers
In a study on the effect of cocaine on the brains of rats, two groups of animals were
selected.
