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ATI TEAS Practice Test A Questions and Answers (Science and English)
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ATI TEAS Practice Test A Questions and Answers (Science and English)
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ATI TEAS Practice Test A Questionsand Answers (Science and English)
Which of the following cell types provides a waterproofing function for the
outer layers of skin?
A. Melanocytes
B. Keratinocytes
C. Merkel cells
D. Langerhans cells - -B. Keratinocytes
Keratinocytes contain the protein keratin. They are produced in the
epidermis and migrate upwards. The tight junctions between cells prevent
water entry. They eventually form a layer of dead cells on the skin surface,
which produces a waterproofing effect.
-A person is suddenly frightened. Which of the following reactions occurs
next?
A. Liver cells absorb glucose from the blood stream.
B. Blood vessels supplying skeletal muscles constrict.
C. Blood vessels supplying the intestines dilate.
D. Liver cells release glucose into the blood stream. - -D. Liver cells release
glucose into the blood stream.
Epinephrine causes liver cells to break down glycogen, which causes an
increase in sugar in the blood stream.
-Kidneys remove which of the following from the blood?
A. Platelets
B. Salts
C. Oxygen
D. Fat - -B. Salts
Salts are removed by the kidneys.
-Which of the following structures within a human cell is responsible for
recycling the materials no longer functional or needed within the cell?
A. Ribosome
B. Lysosome
C. Mitochondrion
D. Nucleolus - -B. Lysosome
, Lysosomes are specialized vacuoles containing digestive enzymes.
-Which of the following are sesamoid bones?
A. Phalanges
B. Patellae
C. Scapulae
D. Metatarsals - -B. Patellae
Patellae are sesamoid bones, which develop in response to strain. Patellae
are also considered short bones.
-Which of the following chemical compounds prevents the lungs from
collapsing?
A. Mucus
B. Surfactant
C. Enzymes
D. Buffers - -B. Surfactant
Surfactants are lipopolysaccharides that have a hydrophobic and hydrophilic
layer. They keep the lungs inflated.
-The use of an electron would most benefit the study of
A. the structure of atoms.
B. the structure of cellular organelles.
C. the structure of skeletal joints.
D. chemical bones in molecules. - -B. the structure of cellular organelles
Electron microscopy has significantly improved the ability to see and
understand the workings of these organelles because electron wavelengths
are short enough to resolve the structure of organelles, which are around
100x larger than the wavelengths of an electron.
-Which of the following arteries directly supplies oxygenated blood to the
reproductive system?
A. Common carotid artery
B. Gonadal artery
C. Femoral artery
D. Subclavian artery - -B. Gonadal artery
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