PAX SCIENCE NLN EXAM 2025 WITH 100%
ACCURATE SOLUTIONS
1. If a different aquatic organism, such as a fish, is exposed to the same
dilute nitric acid, what type of behavior might you expect to observe, and
why?
The fish will ignore the acid and continue its normal behavior.
The fish may exhibit a defensive behavior, such as swimming
away or hiding, in response to the stimulus of the acid.
The fish will become more active and swim towards the acid.
The fish will change color to blend in with its surroundings.
2. Describe why boiling a metal probe in water for 15 minutes is considered
an effective method of sterilization.
Boiling water kills most bacteria and pathogens, making it
effective for sterilization.
Boiling water changes the chemical structure of the metal,
ensuring sterility.
Boiling water creates a vacuum that removes all contaminants
from the probe.
Boiling water is the fastest method and requires less time than
other methods.
3. Region of the brain involved in conscious thought, memory, and higher
thinking skills.
,medulla oblongata
thalamus
cerebellum
cerebrum
,4. The ________ is a small indentation of the retina that contains cones.
Fovea
Optic nerve
Optic chiasm
Iris
5. Which of the following statements describes structural isomers?
two or more compounds with the same shape
two or more compounds with the same number and type of
atoms but have different types or arrangement of bonds
between the atoms
two compounds with the same number of protons
two or more compounds with different atoms but with the same
electronic properties
6. Describe the role of thromboplastin in the blood clotting process.
Thromboplastin is responsible for the immune response against
pathogens.
Thromboplastin helps in the production of red blood cells in the
bone marrow.
Thromboplastin aids in the transport of oxygen in the
bloodstream.
Thromboplastin initiates the clotting cascade by converting
prothrombin into thrombin, leading to the formation of a clot.
7. Describe why a sheet of paper can stop alpha particles but not beta
particles or gamma rays.
, Alpha particles are relatively large and positively charged,
making them easily absorbed by materials like paper, while beta
particles and gamma rays have greater penetration power.
Alpha particles are smaller than beta particles, allowing them to
be stopped by paper.
Alpha particles are negatively charged and can pass through
paper, while beta particles cannot.
Alpha particles are neutral and can pass through paper, while
gamma rays cannot.
8. If a chemical cell initially had a voltage of 1.5v and then reached
equilibrium, what would be the expected voltage at that point?
0v
between 0 and 1v
greater than 1v
1.5v
9. Which of the following best quantifies an object's inertia?
acceleration
volume
velocity
mass
10. A client is scheduled for an electroencephalogram. What will the nurse
explain to the client regarding the purpose of this test?
evaluates electrical currents of skeletal muscles
determines size and location of brain activity
measures ultrasonic waves in the brain
ACCURATE SOLUTIONS
1. If a different aquatic organism, such as a fish, is exposed to the same
dilute nitric acid, what type of behavior might you expect to observe, and
why?
The fish will ignore the acid and continue its normal behavior.
The fish may exhibit a defensive behavior, such as swimming
away or hiding, in response to the stimulus of the acid.
The fish will become more active and swim towards the acid.
The fish will change color to blend in with its surroundings.
2. Describe why boiling a metal probe in water for 15 minutes is considered
an effective method of sterilization.
Boiling water kills most bacteria and pathogens, making it
effective for sterilization.
Boiling water changes the chemical structure of the metal,
ensuring sterility.
Boiling water creates a vacuum that removes all contaminants
from the probe.
Boiling water is the fastest method and requires less time than
other methods.
3. Region of the brain involved in conscious thought, memory, and higher
thinking skills.
,medulla oblongata
thalamus
cerebellum
cerebrum
,4. The ________ is a small indentation of the retina that contains cones.
Fovea
Optic nerve
Optic chiasm
Iris
5. Which of the following statements describes structural isomers?
two or more compounds with the same shape
two or more compounds with the same number and type of
atoms but have different types or arrangement of bonds
between the atoms
two compounds with the same number of protons
two or more compounds with different atoms but with the same
electronic properties
6. Describe the role of thromboplastin in the blood clotting process.
Thromboplastin is responsible for the immune response against
pathogens.
Thromboplastin helps in the production of red blood cells in the
bone marrow.
Thromboplastin aids in the transport of oxygen in the
bloodstream.
Thromboplastin initiates the clotting cascade by converting
prothrombin into thrombin, leading to the formation of a clot.
7. Describe why a sheet of paper can stop alpha particles but not beta
particles or gamma rays.
, Alpha particles are relatively large and positively charged,
making them easily absorbed by materials like paper, while beta
particles and gamma rays have greater penetration power.
Alpha particles are smaller than beta particles, allowing them to
be stopped by paper.
Alpha particles are negatively charged and can pass through
paper, while beta particles cannot.
Alpha particles are neutral and can pass through paper, while
gamma rays cannot.
8. If a chemical cell initially had a voltage of 1.5v and then reached
equilibrium, what would be the expected voltage at that point?
0v
between 0 and 1v
greater than 1v
1.5v
9. Which of the following best quantifies an object's inertia?
acceleration
volume
velocity
mass
10. A client is scheduled for an electroencephalogram. What will the nurse
explain to the client regarding the purpose of this test?
evaluates electrical currents of skeletal muscles
determines size and location of brain activity
measures ultrasonic waves in the brain
