PAX Science NLN Exam: Questions &
Answers
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. (- answer: 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?
A.) 125\/95 mm Hg
B.) 120\/80 mm Hg
C.) 100\/80 mm Hg
D.) 72\/120 mm Hg (- answer: 120\/80 mm Hg
A woman suddenly chokes on a piece of food and clutches frantically at
her throat. An immediate remedy is to
A.) have her bend forward and tell her to cough.
B.) insert a finger or a blunt object toward the back of the mouth.
C.) apply quick, hard pressures successively to her abdomen, just
beneath her diaphragm.
D.) phone “emergency” for help.
(- answer: apply quick, hard pressures successively to her abdomen,
just beneath her diaphragm.<\/p>\n\n\n\n
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.
C.) hydrogen.
(- answer: carbon dioxide.
Human testes produce
A.) eggs.
B.) follicle stimulating hormone.
C.) growth hormone.
D.) spermatozoa.
(- answer: 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?
A.) 100%
B.) 50 – 75%
C.) Less than 25%
D.) None
(- answer: 50 – 75%
In diagnostic testing, the electroencephalogram permits the physician
to
A.) examine the impulses of the specialized muscle cells of the heart.
B.) examine the impulses of the nerve cells within the brain.
C.) measure the pressure within the eye.<\/p>\n\n\n\n
D.) measure the amount of air upon exhalation.
(- answer: examine the impulses of the nerve cells within the brain.
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
A.) boiling it in water for 15 minutes.
B.) dipping it into a concentrated acid solution.
C.) heating it in a hot air oven at 160\u00b0C for 20 minutes.
D.) washing it in soap and water.
(- answer: boiling it in water for 15 minutes.
In varieties of matter, the term heterogeneous may be applied to
A.) elements, but not compounds.
B.) compounds, but not elements.
C.) compounds and elements, but not mixtures.
D.) mixtures, but not elements or compounds.
(- answer: mixtures, but not elements or compounds.
Heat energy is absorbed in which of these phase changes?
A.) Br2 (l) -> Br2(s)
B.) Br2 (g) –> Br2(l)
C.) Br2 (l) -> Br2(g)
D.) Br2 (g) -> Br2(s)
(- answer: Br2 (l) -> Br2(g)
Periodontitis is an inflammatory condition of the
A.) gum tissue that surrounds the neck of each tooth.
B.) pulp that contains nerve cells and blood vessels of the tooth.<\/p>\n\n\n\n
C.) dentin that surrounds the soft part of a tooth.
D.) enamel that provides a hard surface for chewing.
(- answer: gum tissue that surrounds the neck of each tooth.
The atoms of an element with seven valence electrons are most
probably classified as
A.) metals.
B.) nonmetals.
C.) metalloids.
D.) noble gases.
(- answer: nonmetals.
The inherited factors that are transmitted in an organism from
generation to generation are called its
A.) homozygote.
B.) heterozygote.
C.) genotype.
D.) phenotype.
(- answer: genotype.
The process of nuclear cell division in the cell reproduction of plants
differs from mammals. A major difference is that
A.) homologous chromosomes are paired.
B.) centrioles are replicated.
C.) spindle fibers are missing.
D.) cell plates are synthesized.
(- answer: cell plates are synthesized.
<\/p>\n\n\n\n
NLN Pax Science Practice Tests: Questions
& Answers
A person blows his breath into a straw that is placed in limewater. The
limewater becomes cloudy because the person’s breath contains:
(Ans- 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:
(Ans- ruptured platelets release thromboplastin
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?
(Ans- the approximate focal length of the lens
In ecological succession, the first living thing to colonize a hitherto barren
area is called a:
(Ans- pioneer organism
Unicellular organisms that have a nucleus and can swim with the aid of cilia
are examples of:
(Ans- protozoans
Which of these conditions is associated with smoking?
(Ans- emphysema<\/p>\n\n\n\n
Which of these quantities is most closely associated with an object’s
inertia?
(Ans- Mass
Which of these sequences of anatomic organization, from the simplest level
to the most complex, is the correct sequence?
(Ans- From tissue, organ, organ system to organism
Which part of the cell structure controls the passage of materials into and
out of the cell?
(Ans- Plasma membrane
While working in the chemistry laboratory, a student spills dilute
hydrochloric acid on her hand. What is the first action this student should
take?
(Ans- Flush her hand with large quantities of water
Within a living cell, the oxygen (O2) from a mixture of O2 and carbon
dioxide (CO2) is used up. This creates a concentration gradient across the
cell membrane, drawing O2 across the membrane from the outside in, a
process known as
(Ans- Diffusion
You cut your finger rather deeply while slicing an apple. Which of these
actions should you take first?
(Ans- Wash the wound continuously with cold running water<\/p>\n\n\n\n
30 students in a class carefully measure the length and width of 20 peanut PAX Science NLN Exam: Questions &AnswersA person blows his breath into a straw that is placed in limewater. Thelimewater becomes cloudy because the person’s breath containsA.) carbon dioxide.B.) hydrogen.C.) oxygen.D.) nitrogen. (- answer: carbon dioxide.A physician measures the pulse and blood pressure (BP) of all patientson a routine basis. Which of these measurements show the […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-117520","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/117520","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=117520"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/117520\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=117520"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=117520"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=117520"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
shells. They also count the number and note the size of the peanuts inside.
This information is recorded on various graphs showing the numbers of
nuts and the different sizes. The collected evidence of the peanuts gives
the students an idea of the extent of:
(Ans- variation within a species
A tincture<\/em> is a solution in which:
(Ans- alcohol is the solvent
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 affected by the process of:
(Ans- active transport
If the night temperature drops 50 degrees, the roadrunner’s internal
energy-conservation permits a lowering of body temperature to:
(Ans- 94\u00b0F
1 kilogram (kg) of solid X at 10C and 1 kg of solid Y 10C each absorb 5
joules of heat energy. The final temperatures on X and Y is 15C and 20C,
respectively. Compared to X, Y must have a lower:F
(Ans- specific heat<\/p>\n","protected":false},"excerpt":{"rendered":"