ATI TEAS Practice Test questions with
correct answers update 2026
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 - ...correct answer...-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. - ...correct answer...-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 - ...correct answer...-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 - ...correct answer...-B. Lysosome
Lysosomes are specialized vacuoles containing digestive enzymes.
correct answers update 2026
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 - ...correct answer...-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. - ...correct answer...-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 - ...correct answer...-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 - ...correct answer...-B. Lysosome
Lysosomes are specialized vacuoles containing digestive enzymes.
