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ATI TEAS Practice Test A Science and English Questions with 100% correct answers verified latest
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ATI TEAS Practice Test A Science andEnglish
Which of the following cell types provides a waterproofing function for the outer
layers of skin?
A. Melanocytes
B. Keratinocytes
✅✅-B. Keratinocytes
C. Merkel cells
D. Langerhans cells -
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.
✅✅-D. Liver cells release
C. Blood vessels supplying the intestines dilate.
D. Liver cells release glucose into the blood stream. -
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
✅✅-B. Salts
C. Oxygen
D. Fat -
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
✅✅-B. Patellae
C. Scapulae
D. Metatarsals -
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
✅✅-B. Surfactant
C. Enzymes
D. Buffers -
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.
✅✅-B. the structure of cellular organelles
C. the structure of skeletal joints.
D. chemical bones in molecules. -
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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