Question 1
ATI TEAS Version7 Science (2026). Which of the following occurs during inhalation?
- The diaphragm moves out and the intercostal muscles relax.
- The diaphragm moves out and the intercostal muscles contract.
- The diaphragm moves down and the intercostal muscles relax.
- The diaphragm moves down and the intercostal muscles contract.
Question 2
Which of the following parts of the pulmonary system is held open by C-shaped rings of cartilage?
- Trachea
- Bronchioles
- Pharynx
- Alveoli
Question 3
Which of the following is the process of moving through a cell membrane against a concentration gradient?
- Facilitated diffusion
- Active transport
- Osmosis
- Passive transport
Question 4
Which of the following is the destination of blood after it leaves the left ventricle?
- Pulmonary artery
- Aorta
- Right atrium
- Left atrium
Question 5
Which of the following is the function of the lymph nodes?
- Filter debris from intracellular spaces
- Carry oxygen to the tissues
- Produce bile
- Store sugar for the body ATI TEAS Version7 Science (2026)
Question 6
Which of the following occurs at the beginning of systole?
- The ventricles relax.
- The ventricles contract.
- The atria contract.
- The atrioventricular valves open.
Question 7
Which of the following is a function of the digestive system?
- Breaking down food into nutrients
- Delivering oxygen to cells
- Transporting blood throughout the body
- Providing structural support for the body
Question 8
Which of the following is the process by which food is moved through the gastrointestinal tract?
- Mastication
- Peristalsis
- Segmentation
- Emulsification
Question 9
Which of the following is the function of the nervous system?
- To send and receive signals to and from different parts of the body
- To pump blood to all parts of the body
- To protect the body from pathogens
- To regulate the body’s temperature
Question 10
Which of the following describes the function of the myelin sheath?
- To produce neurotransmitters
- To store calcium ions
- To increase the speed of nerve impulses
- To connect neurons to muscle fibers
Question 11
Which of the following is a function of the muscular system?
- To provide movement for the body
- To produce red blood cells
- To store minerals
- To regulate blood sugar levels
Question 12
Which of the following is the structural unit of a muscle? ATI TEAS Version7 Science (2026)
- Sarcomere
- Neuron
- Osteon
- Nephron
Question 13
Which of the following is a function of the reproductive system?
- To produce gametes
- To filter waste from the blood
- To regulate metabolism
- To protect the body from infection
Question 14
Which of the following is the site of fertilization in the female reproductive system?
- Uterus
- Ovary
- Fallopian tubes
- Cervix
Question 15
Which of the following is the function of the integumentary system?
- To protect the body from the environment
- To produce hormones
- To facilitate gas exchange
- To digest food
Question 16
Which of the following is a layer of the skin?
- Epidermis
- Myocardium
- Periosteum
- Endothelium
Question 17
Which of the following is the function of the endocrine system?
- To produce and secrete hormones
- To provide structural support
- To transport nutrients
- To defend against pathogens
Question 18
Which of the following is the “master gland” of the endocrine system?
- Thyroid gland
- Adrenal gland
- Pituitary gland
- Pancreas
Question 19
Which of the following best explains why the pressure exerted by carbon dioxide on the walls of a sealed container increases when dry ice (solid CO2) sublimates?
- Gas CO2 particles occupy more space.
- CO2 molecules combine to form larger molecules in the gas phase.
- CO2 particles exert less force on the container walls as a gas.
- Gas CO2 molecules move faster when CO2 is a solid.
Question 20
The insulating sheath that facilitates rapid movement of the action potential down the axon is known as which of the following?
- Myosin
- Sarcomere
- Actin
- Myelin ATI TEAS Version7 Science (2026)
Question 21
Which of the following substances is excreted by sweat glands in response to the breakdown of proteins and the formation of ammonia? ATI TEAS Version7 Science (2026)
- Sebum
- Urea
- Lysozymes
- Water
Question 22
Which of the following processes causes most of the carbon dioxide from the blood to move into the alveoli?
- Passive transport using carrier proteins
- Active transport using energy
- Diffusion down a concentration gradient
- Conversion to carbon monoxide
Question 23
Free ears in dogs are controlled by the dominant allele (F), and attached ears are controlled by the recessive allele (f). In addition, short hair in dogs is due to a dominant allele (S), and long hair is due to a recessive allele (s). Which of the following is the genotype of a dog with attached ears and short hair?
- ffss
- Ffss
- ffSs
- FfSs
Question 24
Which of the following is a function of the skeletal system?
- Protection of internal organs
- Production of hormones
- Exchange of gases
- Digestion of nutrients
Question 25
Which of the following describes the most important reason for repeating an experimental investigation?
- To verify the validity of the original findings
- To manipulate the independent variable
- To expand upon the original investigation
- To attempt to disprove the hypothesis
Question 26
Which of the following parts contain cells targeted by antidiuretic hormones (ADH)?
- A (Ureter)
- B (Kidney)
- C (Urethra)
- D (Bladder)
Question 27
Which of the following is correct regarding the pH scale?
- A substance with a pH of 3 is two times more alkaline than a substance with a pH of 4.
- A substance with a pH of 3 is 10 times more acidic than a substance with a pH of 4.
- A substance with a pH of 3 is 10 times more alkaline than a substance with a pH of 4.
- A substance with a pH of 3 is two times more acidic than a substance with a pH of 4.
Question 28
Which of the following types of chemical bonds are responsible for forming the primary structure of proteins? ATI TEAS Version7 Science (2026)
- Peptide bonds
- Disulfide bonds
- Phosphodiester bonds
- Hydrogen bonds
Question 30
Which of the following microscopes would be best suited for observing the surface structures of a virus particle?
- Scanning electron microscope
- Compound light microscope
- Stereoscopic microscope
- Fluorescence microscope
Question 31
Supplemental amino acids can be given intravenously to preterm infants to stimulate growth. By which of the following direct mechanisms might these supplemental amino acids help promote growth?
- The supplemental amino acids are used to make nucleic acids.
- The supplemental amino acids are used to make lipids.
- The supplemental amino acids are used to make carbohydrates.
- The supplemental amino acids are used to make proteins.
Question 34
List the number of protons, neutrons, and electrons for an anion with a negative 3 charge if the neutral atom has an atomic number of 15 and mass of 31.
- 15 protons, 16 neutrons, 12 electrons
- 15 protons, 16 neutrons, 15 electrons
- 15 protons, 16 neutrons, 18 electrons
- 12 protons, 31 neutrons, 15 electrons
Question 35
A scanning electron microscope found bacteria arranged as shown. According to the flow chart, which of the following types of bacteria was found?
- Gram-positive Staphylococcus
- Gram-negative Micrococcus
- Gram-positive Streptomyces
- Gram-negative Lactobacillus
Question 36
A student conducts an experiment where they dissolve 1 g each of several substances in 50 mL of water. They have 12 identical plastic cups of water and places 1 g of salt into three of the cups, 1 g of sugar into three of the cups, and 1 g of baking soda into three of the cups. The three remaining cups contain only water. All the cups are put in a freezer and the temperature of the solution in each cup is recorded every 15 minutes for 4 hours. Which of the following questions is the student most likely investigating?
- How is the cooling rate of water affected by different solutes?
- How does the volume of water affect the rate at which it cools?
- What effect does cooling have on the solubility of different solutes?
- What effect do different concentrations of solute have on the freezing point of water?
Question 37
If an atom has one valence electron, which of the following characteristics will it exhibit when reacting with other elements?
- It is likely to lose one electron to form a positive ion.
- It is unreactive.
- It has a high ionization energy and will not lose its electron easily.
- It will resist forming any bonds due to a full outer shell.
Question 38
Why do enzyme-catalyzed reactions slow significantly at excessively high temperatures? ATI TEAS Version7 Science (2026)
- The enzyme denatures, losing its functional shape.
- The enzyme’s active site becomes more rigid and prevents substrate release.
- High temperatures cause an increase in the amount of substrate.
- The enzyme lowers the activation energy to an unfavorable level.
Question 39
Which of the following statements describes how bile salts aid during digestion? ATI TEAS Version7 Science (2026)
- Decrease the size of starches to aid in digestion
- Increase the size of starches to aid in digestion
- Increase the size of fat droplets to aid in digestion
- Decrease the size of fat droplets to aid in digestion
Question 40
Which of the following levels of organization is considered the simplest living unit?
- Organs
- Tissues
- Cells
- Organisms
Question 41
Which of the following structures connects the bladder to the outside of a woman’s body?
- Urethra
- Ureter
- Vagina
- Fallopian tubes
Question 42
An individual cell is able to make copies of its genetic information but is unable to produce encoded proteins. This indicates a possible problem with the:
- Golgi apparatus.
- acrosome.
- ribosome.
- centrosome.
Question 43
An infection caused by a unicellular microorganism that possesses a nucleus and cilia indicates what type of pathogen?
- Viruses
- Helminths
- Protozoa
- Bacteria
Question 44
Which of the following planes divides the body into left and right halves?
- Transverse plane
- Sagittal plane
- Frontal plane
- Coronal plane
Question 45
A researcher is investigating solubility and uses a scale in grams per cubic meter (g/m3). During the analysis, they realize their data needs to be presented in kilograms per cubic meter (kg/m3). What step should the researcher take to accurately convert their solubility values? ATI TEAS Version7 Science (2026)
- Divide by 10
- Multiply by 1,000
- Divide by 1,000
- Multiply by 10
Question 46
Which of the following statements correctly describes a solution with a pH of 10?
- The solution has a hydroxide ion concentration of 10^-4.
- The solution has a hydrogen ion concentration of 10^-4.
- The solution is neutral.
- The solution is a weak acid.
Question 47
Mammalian catalase will break down hydrogen peroxide into water and oxygen. One milliliter (mL) of catalase is added to a beaker containing 200 mL of hydrogen peroxide. Which of the following scenarios would cause an increase in the rate of the reaction?
- Place the beaker of catalase and hydrogen peroxide in a warm water bath.
- Add a competitive inhibitor to the beaker with the catalase and hydrogen peroxide.
- Add ice cubes to the reaction beaker.
- Add a noncompetitive inhibitor to the beaker with the catalase and hydrogen peroxide.
Question 48
The following information must be communicated in a general newspaper article: “Most living animal species belong to the infrakingdom Bilateria…”. Which of the following types of graphs should the editor use to best present this information and show overlap between the different organisms?
- Scatter plot
- Venn diagram
- Pie chart
- Histogram
Question 49
The destruction of which of the following pancreatic cells results in type 1 diabetes mellitus, or insulin-dependent diabetes?
- Delta cells
- Beta cells
- F cells
- Alpha cells
Question 50
An experiment was performed to investigate the influence of water temperature on the respiratory rate of catfish, as measured by the number of gill openings per minute. According to the data table, which of the following describes the relationship between fish gill openings and temperature?
- As temperature increased, fish respiratory rate increased and then decreased.
- As water temperature decreased, fish respiratory rate increased.
- The number of gill openings increased with increasing temperature.
- The temperature did not affect the number of gill openings.
