ATI TEAS PRACTICE TEST A QUESTIONS AND ANSWERS

ATI TEAS PRACTICE TEST A QUESTIONS AND
ANSWERS



Which of the following cell types provides a waterproofing function for the outer layers of ski
xc xc xc xc xc xc xc xc xc xc xc xc xc xc xc




n?

A. Melanocytes
xc




B. Keratinocytes
xc




C. Merkel cells
xc xc




D. Langerhans cells - ans-B. Keratinocytes
xc xc xc xc xc




Keratinocytes contain the protein keratin. They are produced in the epidermis and migrate
xc xc xc xc xc xc xc xc xc xc xc xc xc




upwards. The tight junctions between cells prevent water entry. They eventually form a laye
xc xc xc xc xc xc xc xc xc xc xc xc xc




r of dead cells on the skin surface, which produces a waterproofing effect.
xc xc xc xc xc xc xc xc xc xc xc xc




A person is suddenly frightened. Which of the following reactions occurs next?
xc xc xc xc xc xc xc xc xc xc xc xc




A. Liver cells absorb glucose from the blood stream.
xc xc xc xc xc xc xc xc




B. Blood vessels supplying skeletal muscles constrict.
xc xc xc xc xc xc




C. Blood vessels supplying the intestines dilate.
xc xc xc xc xc xc




D. Liver cells release glucose into the blood stream. - ans-
xc xc xc xc xc xc xc xc xc xc




D. Liver cells release glucose into the blood stream.
xc xc xc xc xc xc xc xc xc




Epinephrine causes liver cells to break down glycogen, which causes an increase in sugar i
xc xc xc xc xc xc xc xc xc xc xc xc xc xc




n the blood stream.
xc xc xc




Kidneys remove which of the following from the blood?
xc xc xc xc xc xc xc xc xc




A. Plateletsxc




B. Salts xc




C. Oxygen xc




D. Fat - ans-B. Salts
xc xc xc xc




Salts are removed by the kidneys.
xc xc xc xc xc




Which of the following structures within a human cell is responsible for recycling the materia
xc xc xc xc xc xc xc xc xc xc xc xc xc xc




ls no longer functional or needed within the cell?
xc xc xc xc xc xc xc xc xc




A. Ribosome xc




B. Lysosome xc

, C. Mitochondrion
xc xc




D. Nucleolus - ans-B. Lysosome
xc xc xc xc




Lysosomes are specialized vacuoles containing digestive enzymes.xc xc xc xc xc xc




Which of the following are sesamoid bones?
xc xc xc xc xc xc xc




A. Phalanges
xc




B. Patellae
xc




C. Scapulae
xc




D. Metatarsals - ans-B. Patellae
xc xc xc xc




Patellae are sesamoid bones, which develop in response to strain. Patellae are also consid
xc xc xc xc xc xc xc xc xc xc xc xc xc




ered short bones. xc xc




Which of the following chemical compounds prevents the lungs from collapsing?
xc xc xc xc xc xc xc xc xc xc xc




A. Mucus
xc




B. Surfactant
xc




C. Enzymes
xc




D. Buffers - ans-B. Surfactant
xc xc xc xc




Surfactants are lipopolysaccharides that have a hydrophobic and hydrophilic layer. They k
xc xc xc xc xc xc xc xc xc xc xc




eep the lungs inflated.
xc xc xc




The use of an electron would most benefit the study of
xc xc xc xc xc xc xc xc xc xc




A. the structure of atoms.
xc xc xc xc




B. the structure of cellular organelles.
xc xc xc xc xc




C. the structure of skeletal joints.
xc xc xc xc xc




D. chemical bones in molecules. - ans-B. the structure of cellular organelles
xc xc xc xc xc xc xc xc xc xc xc




Electron microscopy has significantly improved the ability to see and understand the workin
xc xc xc xc xc xc xc xc xc xc xc xc




gs of these organelles because electron wavelengths are short enough to resolve the struct
xc xc xc xc xc xc xc xc xc xc xc xc xc




ure of organelles, which are around 100x larger than the wavelengths of an electron.
xc xc xc xc xc xc xc xc xc xc xc xc xc




Which of the following arteries directly supplies oxygenated blood to the reproductive syste
xc xc xc xc xc xc xc xc xc xc xc xc




m? xc




A. Common carotid artery
xc xc xc




B. Gonadal artery
xc xc




C. Femoral artery
xc xc




D. Subclavian artery - ans-B. Gonadal artery
xc xc xc xc xc xc