ATI TEAS Science TEST BANK
ATI TEAS SCIENCE TEST BANK 90 QUESTIONS AND
ANSWERS WITH RATIONALES 2025 LATEST VERSION
GRADED A+ GUARANTEED PASS
Instructions to Candidates
• This revision exam consists of 90 multiple-choice questions, each accompanied by the
correct answer.
• The purpose of this material is to support your personal revision and self-assessment.
• Please read each question carefully and thoroughly to ensure full understanding.
• Take your time to reflect on the correct answers and, where necessary, review related
study materials for deeper comprehension.
• You are encouraged to complete the exam under timed conditions to simulate a real
examination environment.
• Best of luck in your revision and upcoming exams.
1|Page
, ATI TEAS Science TEST BANK
Which gland is responsible for the regulation of calcium levels?
A. the parathyroid glands
B. the pituitary gland
C. the adrenal glands
D. the pancreas
A. The parathyroid glands
The parathyroid glands are four small glands that isa on top of the thyroid gland and regulate
calcium levels by secreting parathyroid hormone.
The hormone regulates the amount of calcium and magnesium that is excreted by the kidneys
into the urine.
Which statement matches the function to the organ of the digestive system?
A. The large intestine reabsorbs water int he body to form solid waste.
B The duodenum is the middle section of the small intestine in which acids, fat, and sugar are
absorbed.
C. The jejunum is the first part of the small intestine that receives chyme form the stomach and
further digests it prior to entering the large intestine.
D. The gallbladder produces insulin to assist in the transport of sugars form the blood to the
organs.
A. The large intestine's main function is the reaborsptlon of water into the body to form solid
waste.
It also allows for the absorption of vitamin K produced by microbes living inside the large
intestine.
- The duodenum is the first second of the small intestine that receives partially digested food
from the stomach, also called chyme, further digestion tit with the help of enzymes released by
the gall bladder, before it enters into the small intestine.
- The pancreases (not the gall bladder) releases insulin to assist in the removal and transport of
sugar in the body.
- The jejunum is the second portion of the small intestine in which amino acids, fatty acids, and
sugars are absorbed.
In your garden, you noticed that the tomato plants did better on the north side of your house
than the west side and you decided to figure out why. They are both planted with the same soil
that provides adequate nutrients to the plant, and they are watered at the same time during
the week. Over the course of a week, you begin to measure the amount of sunlight that hits
each side of the house and determine that the north side gets more light because the sunlight is
2|Page
, ATI TEAS Science TEST BANK
blocked by the house's shadow on the west side. What is the name of the factor in your
observations that affected the tomato plants growth?
A. the control
B. the independent variable
C. the dependent variable
D. The conclusion
B. The conclusion was that the amount of sunlight received by the pants was affecting their
growth.
- The independent variable was the amount of light that was given to the plants and could have
been manipulated by the experiment by moving the plants or adding equal parts of light.
- No control was used in this experiment.
Which of the following describes one responsibility of the integumentary system?
A. Distributing vital substances (such as nutrients) throughout the body
B. Blocking pathogens that cause disease
C. Sending leaked fluids from cardiovascular system back to the blood vessels
D. sorting bodily hormones that influence gender traits.
B. The integumentary system includes skin, hair, and mucous membranes, all of which are
responsible-in part, at least-for blocking disease-causing pathogens from entering the
bloodstream.
- The circulatory system distributes vital substances through the body.
- The lymphatic system sends leaked fluids from the cardiovascular system back to the blood
vessels.
- The reproductive system stores bodily hormones that influence gender traits.
When are the parasympathetic nerves active within the nervous system?
A. when an individual experiences a strong emotion, such as fear or excitement.
B. when an individual feels pain or heat.
C. when an individual is either talking or walking.
D. when an individual is either resting or eating.
D. The parasympathetic nerves are active when an individual is ether resting or eating.
3|Page
, ATI TEAS Science TEST BANK
- The sympathetic nerves are active when an individual experience a strong emotion, such as
fear or excitement.
- Feeling pain and hat fall under the responsibility of the sensory neurons.
Talking and walking fall under the responsibility of the ganglia within the sensory-somatic
nervous system.
Which of the following best described the relationship between the circulatory system and the
integumentary system?
A. removal of excess heat from body.
B. hormonal influence on blood pressure
C. regulation of blood's pressure and volume.
D. development of blood cells within marrow.
A. The integumentary system coordinates with the circulatory system to remove excess heat
form the body. The superficial blood vessels (those nearest the surface of the skin) dilate to
allow the heat to exit the Boyd.
- The hormonal influence on blood pressure is the result of the relationship between the
circulatory system and the endocrine system.
- The urinary system is responsible for assisting the regulation of blood's pressure and volume.
- The skeletal system is responsible for assisting the development of blood vessels within the
marrow.
Which of the following statements describes the path of blood entering into the heart?
A. Blood enters the heart through the pulmonary vein, into the right atrium, through the
tricuspid have to the right ventricle.
B. Once the right ventricle is full, blood exits into the pulmonary artery and then empties into
the left ventricle.
C. After traveling through he lungs, oxygenated blood enters into the left atrium, then through
the mitral valve to the left ventricle.
D. Once the left ventricle is full, the left tricuspid valve shuts, the ventricle contracts, and blood
exists through the aorta.
C. Blood returns to the heart from both the inferior and superior vena cava, entering into the
right atrium, though the tricuspid valve, and into he right ventricle. Once the right ventricle is
full, the tricuspid valve closes, and upon heart contraction, the blood is pumped through the
pulmonary artery, becoming oxygenated in the lungs. The blood returns to the heart from the
lungs through the pulmonary vein, into the left atrium, through the mitral valve, and into the
4|Page
ATI TEAS SCIENCE TEST BANK 90 QUESTIONS AND
ANSWERS WITH RATIONALES 2025 LATEST VERSION
GRADED A+ GUARANTEED PASS
Instructions to Candidates
• This revision exam consists of 90 multiple-choice questions, each accompanied by the
correct answer.
• The purpose of this material is to support your personal revision and self-assessment.
• Please read each question carefully and thoroughly to ensure full understanding.
• Take your time to reflect on the correct answers and, where necessary, review related
study materials for deeper comprehension.
• You are encouraged to complete the exam under timed conditions to simulate a real
examination environment.
• Best of luck in your revision and upcoming exams.
1|Page
, ATI TEAS Science TEST BANK
Which gland is responsible for the regulation of calcium levels?
A. the parathyroid glands
B. the pituitary gland
C. the adrenal glands
D. the pancreas
A. The parathyroid glands
The parathyroid glands are four small glands that isa on top of the thyroid gland and regulate
calcium levels by secreting parathyroid hormone.
The hormone regulates the amount of calcium and magnesium that is excreted by the kidneys
into the urine.
Which statement matches the function to the organ of the digestive system?
A. The large intestine reabsorbs water int he body to form solid waste.
B The duodenum is the middle section of the small intestine in which acids, fat, and sugar are
absorbed.
C. The jejunum is the first part of the small intestine that receives chyme form the stomach and
further digests it prior to entering the large intestine.
D. The gallbladder produces insulin to assist in the transport of sugars form the blood to the
organs.
A. The large intestine's main function is the reaborsptlon of water into the body to form solid
waste.
It also allows for the absorption of vitamin K produced by microbes living inside the large
intestine.
- The duodenum is the first second of the small intestine that receives partially digested food
from the stomach, also called chyme, further digestion tit with the help of enzymes released by
the gall bladder, before it enters into the small intestine.
- The pancreases (not the gall bladder) releases insulin to assist in the removal and transport of
sugar in the body.
- The jejunum is the second portion of the small intestine in which amino acids, fatty acids, and
sugars are absorbed.
In your garden, you noticed that the tomato plants did better on the north side of your house
than the west side and you decided to figure out why. They are both planted with the same soil
that provides adequate nutrients to the plant, and they are watered at the same time during
the week. Over the course of a week, you begin to measure the amount of sunlight that hits
each side of the house and determine that the north side gets more light because the sunlight is
2|Page
, ATI TEAS Science TEST BANK
blocked by the house's shadow on the west side. What is the name of the factor in your
observations that affected the tomato plants growth?
A. the control
B. the independent variable
C. the dependent variable
D. The conclusion
B. The conclusion was that the amount of sunlight received by the pants was affecting their
growth.
- The independent variable was the amount of light that was given to the plants and could have
been manipulated by the experiment by moving the plants or adding equal parts of light.
- No control was used in this experiment.
Which of the following describes one responsibility of the integumentary system?
A. Distributing vital substances (such as nutrients) throughout the body
B. Blocking pathogens that cause disease
C. Sending leaked fluids from cardiovascular system back to the blood vessels
D. sorting bodily hormones that influence gender traits.
B. The integumentary system includes skin, hair, and mucous membranes, all of which are
responsible-in part, at least-for blocking disease-causing pathogens from entering the
bloodstream.
- The circulatory system distributes vital substances through the body.
- The lymphatic system sends leaked fluids from the cardiovascular system back to the blood
vessels.
- The reproductive system stores bodily hormones that influence gender traits.
When are the parasympathetic nerves active within the nervous system?
A. when an individual experiences a strong emotion, such as fear or excitement.
B. when an individual feels pain or heat.
C. when an individual is either talking or walking.
D. when an individual is either resting or eating.
D. The parasympathetic nerves are active when an individual is ether resting or eating.
3|Page
, ATI TEAS Science TEST BANK
- The sympathetic nerves are active when an individual experience a strong emotion, such as
fear or excitement.
- Feeling pain and hat fall under the responsibility of the sensory neurons.
Talking and walking fall under the responsibility of the ganglia within the sensory-somatic
nervous system.
Which of the following best described the relationship between the circulatory system and the
integumentary system?
A. removal of excess heat from body.
B. hormonal influence on blood pressure
C. regulation of blood's pressure and volume.
D. development of blood cells within marrow.
A. The integumentary system coordinates with the circulatory system to remove excess heat
form the body. The superficial blood vessels (those nearest the surface of the skin) dilate to
allow the heat to exit the Boyd.
- The hormonal influence on blood pressure is the result of the relationship between the
circulatory system and the endocrine system.
- The urinary system is responsible for assisting the regulation of blood's pressure and volume.
- The skeletal system is responsible for assisting the development of blood vessels within the
marrow.
Which of the following statements describes the path of blood entering into the heart?
A. Blood enters the heart through the pulmonary vein, into the right atrium, through the
tricuspid have to the right ventricle.
B. Once the right ventricle is full, blood exits into the pulmonary artery and then empties into
the left ventricle.
C. After traveling through he lungs, oxygenated blood enters into the left atrium, then through
the mitral valve to the left ventricle.
D. Once the left ventricle is full, the left tricuspid valve shuts, the ventricle contracts, and blood
exists through the aorta.
C. Blood returns to the heart from both the inferior and superior vena cava, entering into the
right atrium, though the tricuspid valve, and into he right ventricle. Once the right ventricle is
full, the tricuspid valve closes, and upon heart contraction, the blood is pumped through the
pulmonary artery, becoming oxygenated in the lungs. The blood returns to the heart from the
lungs through the pulmonary vein, into the left atrium, through the mitral valve, and into the
4|Page
