ATI TEAS PRACTICE TEST SCIENCE | 2026
UPDATED STUDY GUIDE WITH QUESTIONS,
ANSWERS, AND RATIONALES
| GRADED A+ | GUARANTEED SUCCESS
Updated 2026 Questions and Answers
100% Verified Exam Prep and Comprehensive
Rationales Included
,THE NEXT QUESTION REFERS TO THE FOLLOWING C.
GRAPHICS: The chart shows two specific changes: snowfall levels from November to April
The chart above shows the average snowfall in inches for and sunny days from November to April.
a two on Michigan's Upper Peninsula, during the months
November through April. Which of the following can be
concluded based on the information that is provided in
the chart?
A. April is not a good month to go skiing in the Upper
Peninsula.
B. Snowfall blocks the sunshine reduces the number of
sunny days.
C. The fewest sunny days occur in the months with the
heaviest snowfall.
D. There is no connection between the amount of
snowfall and the number of sunny days.
Which of the following statements correctly describes D. The epiglottis covers the trachea during swelling, thus preventing food from
the function of the corresponding physiologic structure? entering the airway.
A. The trachea connects the throat and the stomach, - The trachea (windpipe) is cylindrical portion of the reparatory tract that joins the
encouraging food to follow this path through larynx with the lungs.
contractions. - The esophagus connects the throat and the stomach. When a person swallows,
B. The esophagus is the cylindrical portion of the the esophagus contracts to force the food down into the stomach. The esophagus
respiratory tract that joins the larynx with the lungs. secretes mucus for lubrication.
C. the diaphragm is a muscle that controls the height of - The diaphragm is a muscle that controls the height of the thoracic cavity,
the thoracic cavity, decreasing the height on contraction, increasing the height on contraction (inspiration), and decreasing the height on
and increasing the height on relaxation causing relaxation (expiration).
expiration.
D. The epiglottis covers the trachea during swallowing,
preventing food from entering the airway.
Which of the following is an example of the location and B. The pads that support the vertebrae are made up of cartilage.
function of cartilage int he body? - Cartilage, a strong form of connective tissue, cushions ad supports the joints.
Cartilage also makes up the larynx and the outer ear.
A. The dense connective tissue that comprises the better - Bone is a form of connective tissue that comprises the better part of the
part of the structural skeleton. skeleton. It includes both organic and inorganic substances.
B. The supportive pads that provide cushion at joints, - Tendons connect the muscles to other structures of the body, typically bones.
such as between the vertebrae of the spinal cord. Tendons can increase and decrease in length as the bones move.
C. The connective structure made of fibrous collagen that - Fat is a combination of lipids; in humans, fat forms a layer beneath the skin and
connects muscles and bones, such as the connection of on the outside of the internal organs.
the patella to the quadricep.
D. The layer beneath the skin and on the outside of
internal organs that provides cushioning and protection.
,Two criteria for classifying epithelial tissue are: C. Cell layers and cell shape are the criteria for classifying epithelial tissue.
A. Cell type and cell function
B. Cell shape and cell type - Cell layers refers to the amount of cells that separate the basement membrane
C. Cell layers and cell shape from the surface, such as a simple single layer, a stratified layer (2 or more), or a
D. Cell function and cell layers pseudostratfied layer.
- Cell shapes refer to the shape of the outer cells and can be squamous, columnar
or cuboidal.
Where is the parathyroid gland located? A. The parathyroid gland is located on the lateral lobes of the thyroid gland in the
A. On the lateral lobes of the thyroid gland, on the neck, on the posterior aspect.
posterior aspect.
B. On the pyramidal lobe of the thyroid gland, on the - It is part of the endocrine system.
posterior aspect. - When the supply of calcium in blood diminishes to unhealthy levels, the
C. On the lateral thyroid gland, on the anterior aspect. parathyroid gland motivates the secretion of a hormone that encourages the
D. On the left lateral lobe of the thyroid gland, on the bones to release calcium into the bloodstream. The parathyroid Gand also
anterior aspect. regulates the amount of phosphate in the blood by stimulating the excretion of
phosphates in the urine.
How many organ system are in the human body? D. There are 11 organ systems n the human body.
A. 12 - Circulatory System
B. 15 - Digestive System
C. 9 - Endocrine System
D. 11 - Integumentary System
- Lymphatic System
- Muscular System
- Nervous System
- Reproductive System
- Respiratory System
- Skeletal System
- Urinary System
Which element or structure within the respiratory system B. Cilia.
is responsible for removing foreign matter from the - The cilia are the tiny hairs in the respiratory system that are responsible for
lungs? removing reign matter from the lungs.
A. Bronchial tubes - The cilia are located within the bronchial tubes, but it is the cilia that have the
B. Cilia responsibility for removing inappropriate materials before they enter the lungs.
C. Trachea
D. Alveoli
Organized from highest to lowest, what is the hierarchy C. The order of hierarchy of human body structures is as follows:
of the human body's structures is as follows: - Organism
- Organism, organ systems, organs, tissues. - Organ systems
Which of the following comes next? - Organs
A. Organs, cells, tissues, molecules, atoms - Tissues
B. Organ system, organism, organ, cells, tissues, atoms, - Cells
molecules - Molecules
C. Organism, organ system, organs, tissues, cells, - Atoms
molecules, atoms Muscles are types of tissues, so muscles do not have a separate place in the
D. Organism, organ, cells, tissues, molecules, atoms hierarchy but instead fall within the types of tissues.
, THE NEXT TWO QUESTIONS ARE BASED ON THE B. 44.90
PERIODIC TABLE
79.9-35 = 44.90
On average, how many neutrons does one atom of
bromine(Br) have?
Atomic # - 35
Atomic mass - 79.9
A. 35
B. 44.90
C. 45
D. 79.90
On average, how many protons does one atom of zinc A. 30
(Zn) have? The number of protons is the same for every atom of a given element and is the
Atomic # - 30 elements's atomic number; in this case 30 for Zinc (Zn).
Atomic mass - 65.39
A. 30
B. 35
C. 35.99
D. 65.39
Which statement below correctly describes the B. In the lungs, oxygen is transported from the air to the blood through the
movement of molecules in the body and/or in relation to process of diffusion.
the external environment? In which molecules passively move from an area of high concentration to low
A. Osmosis is the movement of a solution from and area concentration.
of low solute concentration to an area of high solute Specifically, the alveolar membranes withdraw the oxygen form the air in the
concentration. lungs into the bloodstream.
B. Diffusion is the process in the lungs by which oxygen is
transported from the air to the blood.
C. Dissipation is the transport of molecules across a - Osmosis is the passive movement of a water from an area of low solute
semipermeable membrane from an area of low concentration to an area of higher solute concentration through a permeable
concentration to high concentration, requiring energy. membrane.
D. Reverse osmosis is the movement of molecules in a - Reverse osmosis is the active transport of water opposite the concentration
solution from an area of high concentration to an area of gradient from an area of low solute concentration to high solute concentration.
lower concentration. - Dissipation is a more general reference of the spread or loss of energy.
Which gland is responsible for the regulation of calcium A. The parathyroid glands
levels? The parathyroid glands are four small glands that isa on top of the thyroid gland
A. the parathyroid glands and regulate calcium levels by secreting parathyroid hormone.
B. the pituitary gland The hormone regulates the amount of calcium and magnesium that is excreted by
C. the adrenal glands the kidneys into the urine.
D. the pancreas
UPDATED STUDY GUIDE WITH QUESTIONS,
ANSWERS, AND RATIONALES
| GRADED A+ | GUARANTEED SUCCESS
Updated 2026 Questions and Answers
100% Verified Exam Prep and Comprehensive
Rationales Included
,THE NEXT QUESTION REFERS TO THE FOLLOWING C.
GRAPHICS: The chart shows two specific changes: snowfall levels from November to April
The chart above shows the average snowfall in inches for and sunny days from November to April.
a two on Michigan's Upper Peninsula, during the months
November through April. Which of the following can be
concluded based on the information that is provided in
the chart?
A. April is not a good month to go skiing in the Upper
Peninsula.
B. Snowfall blocks the sunshine reduces the number of
sunny days.
C. The fewest sunny days occur in the months with the
heaviest snowfall.
D. There is no connection between the amount of
snowfall and the number of sunny days.
Which of the following statements correctly describes D. The epiglottis covers the trachea during swelling, thus preventing food from
the function of the corresponding physiologic structure? entering the airway.
A. The trachea connects the throat and the stomach, - The trachea (windpipe) is cylindrical portion of the reparatory tract that joins the
encouraging food to follow this path through larynx with the lungs.
contractions. - The esophagus connects the throat and the stomach. When a person swallows,
B. The esophagus is the cylindrical portion of the the esophagus contracts to force the food down into the stomach. The esophagus
respiratory tract that joins the larynx with the lungs. secretes mucus for lubrication.
C. the diaphragm is a muscle that controls the height of - The diaphragm is a muscle that controls the height of the thoracic cavity,
the thoracic cavity, decreasing the height on contraction, increasing the height on contraction (inspiration), and decreasing the height on
and increasing the height on relaxation causing relaxation (expiration).
expiration.
D. The epiglottis covers the trachea during swallowing,
preventing food from entering the airway.
Which of the following is an example of the location and B. The pads that support the vertebrae are made up of cartilage.
function of cartilage int he body? - Cartilage, a strong form of connective tissue, cushions ad supports the joints.
Cartilage also makes up the larynx and the outer ear.
A. The dense connective tissue that comprises the better - Bone is a form of connective tissue that comprises the better part of the
part of the structural skeleton. skeleton. It includes both organic and inorganic substances.
B. The supportive pads that provide cushion at joints, - Tendons connect the muscles to other structures of the body, typically bones.
such as between the vertebrae of the spinal cord. Tendons can increase and decrease in length as the bones move.
C. The connective structure made of fibrous collagen that - Fat is a combination of lipids; in humans, fat forms a layer beneath the skin and
connects muscles and bones, such as the connection of on the outside of the internal organs.
the patella to the quadricep.
D. The layer beneath the skin and on the outside of
internal organs that provides cushioning and protection.
,Two criteria for classifying epithelial tissue are: C. Cell layers and cell shape are the criteria for classifying epithelial tissue.
A. Cell type and cell function
B. Cell shape and cell type - Cell layers refers to the amount of cells that separate the basement membrane
C. Cell layers and cell shape from the surface, such as a simple single layer, a stratified layer (2 or more), or a
D. Cell function and cell layers pseudostratfied layer.
- Cell shapes refer to the shape of the outer cells and can be squamous, columnar
or cuboidal.
Where is the parathyroid gland located? A. The parathyroid gland is located on the lateral lobes of the thyroid gland in the
A. On the lateral lobes of the thyroid gland, on the neck, on the posterior aspect.
posterior aspect.
B. On the pyramidal lobe of the thyroid gland, on the - It is part of the endocrine system.
posterior aspect. - When the supply of calcium in blood diminishes to unhealthy levels, the
C. On the lateral thyroid gland, on the anterior aspect. parathyroid gland motivates the secretion of a hormone that encourages the
D. On the left lateral lobe of the thyroid gland, on the bones to release calcium into the bloodstream. The parathyroid Gand also
anterior aspect. regulates the amount of phosphate in the blood by stimulating the excretion of
phosphates in the urine.
How many organ system are in the human body? D. There are 11 organ systems n the human body.
A. 12 - Circulatory System
B. 15 - Digestive System
C. 9 - Endocrine System
D. 11 - Integumentary System
- Lymphatic System
- Muscular System
- Nervous System
- Reproductive System
- Respiratory System
- Skeletal System
- Urinary System
Which element or structure within the respiratory system B. Cilia.
is responsible for removing foreign matter from the - The cilia are the tiny hairs in the respiratory system that are responsible for
lungs? removing reign matter from the lungs.
A. Bronchial tubes - The cilia are located within the bronchial tubes, but it is the cilia that have the
B. Cilia responsibility for removing inappropriate materials before they enter the lungs.
C. Trachea
D. Alveoli
Organized from highest to lowest, what is the hierarchy C. The order of hierarchy of human body structures is as follows:
of the human body's structures is as follows: - Organism
- Organism, organ systems, organs, tissues. - Organ systems
Which of the following comes next? - Organs
A. Organs, cells, tissues, molecules, atoms - Tissues
B. Organ system, organism, organ, cells, tissues, atoms, - Cells
molecules - Molecules
C. Organism, organ system, organs, tissues, cells, - Atoms
molecules, atoms Muscles are types of tissues, so muscles do not have a separate place in the
D. Organism, organ, cells, tissues, molecules, atoms hierarchy but instead fall within the types of tissues.
, THE NEXT TWO QUESTIONS ARE BASED ON THE B. 44.90
PERIODIC TABLE
79.9-35 = 44.90
On average, how many neutrons does one atom of
bromine(Br) have?
Atomic # - 35
Atomic mass - 79.9
A. 35
B. 44.90
C. 45
D. 79.90
On average, how many protons does one atom of zinc A. 30
(Zn) have? The number of protons is the same for every atom of a given element and is the
Atomic # - 30 elements's atomic number; in this case 30 for Zinc (Zn).
Atomic mass - 65.39
A. 30
B. 35
C. 35.99
D. 65.39
Which statement below correctly describes the B. In the lungs, oxygen is transported from the air to the blood through the
movement of molecules in the body and/or in relation to process of diffusion.
the external environment? In which molecules passively move from an area of high concentration to low
A. Osmosis is the movement of a solution from and area concentration.
of low solute concentration to an area of high solute Specifically, the alveolar membranes withdraw the oxygen form the air in the
concentration. lungs into the bloodstream.
B. Diffusion is the process in the lungs by which oxygen is
transported from the air to the blood.
C. Dissipation is the transport of molecules across a - Osmosis is the passive movement of a water from an area of low solute
semipermeable membrane from an area of low concentration to an area of higher solute concentration through a permeable
concentration to high concentration, requiring energy. membrane.
D. Reverse osmosis is the movement of molecules in a - Reverse osmosis is the active transport of water opposite the concentration
solution from an area of high concentration to an area of gradient from an area of low solute concentration to high solute concentration.
lower concentration. - Dissipation is a more general reference of the spread or loss of energy.
Which gland is responsible for the regulation of calcium A. The parathyroid glands
levels? The parathyroid glands are four small glands that isa on top of the thyroid gland
A. the parathyroid glands and regulate calcium levels by secreting parathyroid hormone.
B. the pituitary gland The hormone regulates the amount of calcium and magnesium that is excreted by
C. the adrenal glands the kidneys into the urine.
D. the pancreas
