ATI TEAS 7 Science Practice Test Study Guide Latest
Update 2026 | Pass Exam Prep
1. A cation is:
An atom that has lost proton(s)
An atom that has gained a small number of electrons
A charged atom stable in solutions
An atom that has lost electron(s)
2. Based on what we've learned about isotopes, which of the following is the
correct isotope for an atom that contains 14 protons, 14 electrons, and 16
neutrons?
32S.
31P.
28Si.
29Si.
30Si.
3. What pH level indicates acidosis in the blood?
Between 7.35 and 7.45
Exactly 7.45
Below 7.45
Above 7.45
4. Describe the role of the trachea in the respiratory system.
, The trachea serves as the main airway that conducts air from the
larynx to the bronchi and into the lungs.
The trachea filters and humidifies air before it reaches the lungs.
The trachea produces mucus to trap pathogens in the air.
The trachea is involved in gas exchange between the blood and air.
5. Why is O negative blood considered the universal donor type?
O negative blood is the most common blood type, hence it can be
donated to anyone.
O negative blood lacks A and B antigens, making it safe for
transfusions to any blood type.
O negative blood has the highest iron content, allowing it to be used
in all transfusions.
O negative blood contains antibodies that can fight all infections,
making it universally acceptable.
6. A standard for comparison that helps to ensure that the experimental result is
caused by the condition being tested is the _ _.
dependent variable
constant
independent variable
control
7. Chromosomes are comprised of:
DNA
zygotes
, gametes
cells
8. Discuss the role of luteinizing hormone in the aging process and how its
levels may change.
Luteinizing hormone decreases and affects metabolism negatively.
Luteinizing hormone can increase with age, influencing
reproductive functions.
Luteinizing hormone only affects males during puberty.
Luteinizing hormone has no effect on aging.
9. The more fertilizer a plant receives, the faster it grows; this is an example of
what type of correlation?
Positive
Descriptive
Negative
Inferential
10. A cation is an atom that has
gained one or more protons.
lost one or more electrons.
gained one or more electrons.
gained one or more neutrons.
lost one or more proton.
, 11. What type of sensory information is detected when a person smells
something sweet?
Tactile information
Visual information
Chemical information
Auditory information
12. If a male has a condition that affects the function of the testes, what
physiological processes might be impacted?
Blood circulation and oxygen transport
Immune response and inflammation
Sperm production and hormone regulation
Digestion and nutrient absorption
13. Describe what a pH of 7 indicates about a solution's acidity or alkalinity.
A pH of 7 indicates that the solution is only slightly acidic.
A pH of 7 indicates that the solution is highly alkaline.
A pH of 7 indicates that the solution is neutral, neither acidic nor
alkaline.
A pH of 7 indicates that the solution is highly acidic.
14. What is the final structure through which urine must travel to empty out of
the body?
Epididymis
Urethra
Update 2026 | Pass Exam Prep
1. A cation is:
An atom that has lost proton(s)
An atom that has gained a small number of electrons
A charged atom stable in solutions
An atom that has lost electron(s)
2. Based on what we've learned about isotopes, which of the following is the
correct isotope for an atom that contains 14 protons, 14 electrons, and 16
neutrons?
32S.
31P.
28Si.
29Si.
30Si.
3. What pH level indicates acidosis in the blood?
Between 7.35 and 7.45
Exactly 7.45
Below 7.45
Above 7.45
4. Describe the role of the trachea in the respiratory system.
, The trachea serves as the main airway that conducts air from the
larynx to the bronchi and into the lungs.
The trachea filters and humidifies air before it reaches the lungs.
The trachea produces mucus to trap pathogens in the air.
The trachea is involved in gas exchange between the blood and air.
5. Why is O negative blood considered the universal donor type?
O negative blood is the most common blood type, hence it can be
donated to anyone.
O negative blood lacks A and B antigens, making it safe for
transfusions to any blood type.
O negative blood has the highest iron content, allowing it to be used
in all transfusions.
O negative blood contains antibodies that can fight all infections,
making it universally acceptable.
6. A standard for comparison that helps to ensure that the experimental result is
caused by the condition being tested is the _ _.
dependent variable
constant
independent variable
control
7. Chromosomes are comprised of:
DNA
zygotes
, gametes
cells
8. Discuss the role of luteinizing hormone in the aging process and how its
levels may change.
Luteinizing hormone decreases and affects metabolism negatively.
Luteinizing hormone can increase with age, influencing
reproductive functions.
Luteinizing hormone only affects males during puberty.
Luteinizing hormone has no effect on aging.
9. The more fertilizer a plant receives, the faster it grows; this is an example of
what type of correlation?
Positive
Descriptive
Negative
Inferential
10. A cation is an atom that has
gained one or more protons.
lost one or more electrons.
gained one or more electrons.
gained one or more neutrons.
lost one or more proton.
, 11. What type of sensory information is detected when a person smells
something sweet?
Tactile information
Visual information
Chemical information
Auditory information
12. If a male has a condition that affects the function of the testes, what
physiological processes might be impacted?
Blood circulation and oxygen transport
Immune response and inflammation
Sperm production and hormone regulation
Digestion and nutrient absorption
13. Describe what a pH of 7 indicates about a solution's acidity or alkalinity.
A pH of 7 indicates that the solution is only slightly acidic.
A pH of 7 indicates that the solution is highly alkaline.
A pH of 7 indicates that the solution is neutral, neither acidic nor
alkaline.
A pH of 7 indicates that the solution is highly acidic.
14. What is the final structure through which urine must travel to empty out of
the body?
Epididymis
Urethra
