ATI TEAS PRACTICE TEST A
QUESTIONS & ACCURATE PASSED
SOLUTIONS ALREADY GRADED A+
SUCCESS
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.
Which of the following are sesamoid bones?
A. Phalanges
B. Patellae
C. Scapulae
D. Metatarsals - Correct Answer ✔✔ 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 - Correct Answer ✔✔ 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. - Correct Answer ✔✔ 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 - Correct Answer ✔✔ B. Gonadal artery
QUESTIONS & ACCURATE PASSED
SOLUTIONS ALREADY GRADED A+
SUCCESS
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.
Which of the following are sesamoid bones?
A. Phalanges
B. Patellae
C. Scapulae
D. Metatarsals - Correct Answer ✔✔ 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 - Correct Answer ✔✔ 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. - Correct Answer ✔✔ 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 - Correct Answer ✔✔ B. Gonadal artery
