NLN NEX SCIENCE EXAM NEWEST 2026 ACTUAL
EXAM| NLN (NURSING ENTRANCE EXAM) SCIENCE
EXAM REVIEW WITH 300 REAL EXAM QUESTIONS AND
CORRECT VERIFIED ANSWERS/ ALREADY GRADED A+
(BRAND NEW!!)
1. A patient presents with an elevated PaCO₂ level. This
condition directly indicates:
A) Metabolic alkalosis
B) Hypoventilation
C) Hyperventilation
D) Respiratory alkalosis
Answer: B
Rationale: PaCO₂ (partial pressure of carbon dioxide) is
regulated by the lungs. Hypoventilation (slow/shallow breathing)
leads to the retention of CO₂, increasing PaCO₂.
Hyperventilation causes a decrease .
2. The medical term "renal" refers to which part of the body?
A) The heart
B) The lungs
1
,C) The kidneys
D) The liver
Answer: C
Rationale: "Renal" is the adjective derived from the Latin renes,
meaning kidney. It is used to describe structures, functions, and
diseases related to the kidneys (e.g., renal artery) .
3. Which structure separates the left and right sides of the heart,
preventing oxygenated and deoxygenated blood from mixing?
A) The septum
B) The valve
C) The aorta
D) The pericardium
Answer: A
Rationale: The interventricular septum and interatrial septum are
muscular walls that divide the heart into right and left chambers,
ensuring separate pulmonary and systemic circuits .
4. The larynx is covered by a specific flap of tissue that prevents
food from entering the trachea during swallowing. This structure
is the:
A) Pharynx
B) Epiglottis
2
,C) Uvula
D) Esophagus
Answer: B
Rationale: The epiglottis is a leaf-shaped flap of cartilage.
During swallowing, it folds backward to cover the glottis
(opening to the larynx), directing food toward the esophagus .
5. The retina transmits visual information to the occipital lobe of
the brain via which nerve?
A) Olfactory nerve
B) Trigeminal nerve
C) Optic nerve
D) Vagus nerve
Answer: C
Rationale: The optic nerve (Cranial Nerve II) is a purely sensory
nerve that carries visual impulses from the photoreceptors
(rods/cones) in the retina to the visual cortex for processing .
6. Which type of tissue is the heart muscle primarily composed
of?
A) Skeletal muscle
B) Smooth muscle
3
, C) Cardiac muscle
D) Adipose tissue
Answer: C
Rationale: The myocardium is composed of cardiac muscle tissue.
It is striated like skeletal muscle but contracts involuntarily and
features intercalated discs for rapid signal transmission .
7. Ligaments function to connect:
A) Muscle to bone
B) Bone to bone
C) Nerve to muscle
D) Tendon to bone
Answer: B
Rationale: Ligaments are dense fibrous connective tissue that
attach bone to bone, stabilizing joints. A common injury (sprain)
occurs when ligaments are stretched or torn .
8. Blood pressure is recorded as two values. The pressure
exerted on arterial walls during ventricular contraction is known
as:
A) Diastolic pressure
B) Pulse pressure
4
EXAM| NLN (NURSING ENTRANCE EXAM) SCIENCE
EXAM REVIEW WITH 300 REAL EXAM QUESTIONS AND
CORRECT VERIFIED ANSWERS/ ALREADY GRADED A+
(BRAND NEW!!)
1. A patient presents with an elevated PaCO₂ level. This
condition directly indicates:
A) Metabolic alkalosis
B) Hypoventilation
C) Hyperventilation
D) Respiratory alkalosis
Answer: B
Rationale: PaCO₂ (partial pressure of carbon dioxide) is
regulated by the lungs. Hypoventilation (slow/shallow breathing)
leads to the retention of CO₂, increasing PaCO₂.
Hyperventilation causes a decrease .
2. The medical term "renal" refers to which part of the body?
A) The heart
B) The lungs
1
,C) The kidneys
D) The liver
Answer: C
Rationale: "Renal" is the adjective derived from the Latin renes,
meaning kidney. It is used to describe structures, functions, and
diseases related to the kidneys (e.g., renal artery) .
3. Which structure separates the left and right sides of the heart,
preventing oxygenated and deoxygenated blood from mixing?
A) The septum
B) The valve
C) The aorta
D) The pericardium
Answer: A
Rationale: The interventricular septum and interatrial septum are
muscular walls that divide the heart into right and left chambers,
ensuring separate pulmonary and systemic circuits .
4. The larynx is covered by a specific flap of tissue that prevents
food from entering the trachea during swallowing. This structure
is the:
A) Pharynx
B) Epiglottis
2
,C) Uvula
D) Esophagus
Answer: B
Rationale: The epiglottis is a leaf-shaped flap of cartilage.
During swallowing, it folds backward to cover the glottis
(opening to the larynx), directing food toward the esophagus .
5. The retina transmits visual information to the occipital lobe of
the brain via which nerve?
A) Olfactory nerve
B) Trigeminal nerve
C) Optic nerve
D) Vagus nerve
Answer: C
Rationale: The optic nerve (Cranial Nerve II) is a purely sensory
nerve that carries visual impulses from the photoreceptors
(rods/cones) in the retina to the visual cortex for processing .
6. Which type of tissue is the heart muscle primarily composed
of?
A) Skeletal muscle
B) Smooth muscle
3
, C) Cardiac muscle
D) Adipose tissue
Answer: C
Rationale: The myocardium is composed of cardiac muscle tissue.
It is striated like skeletal muscle but contracts involuntarily and
features intercalated discs for rapid signal transmission .
7. Ligaments function to connect:
A) Muscle to bone
B) Bone to bone
C) Nerve to muscle
D) Tendon to bone
Answer: B
Rationale: Ligaments are dense fibrous connective tissue that
attach bone to bone, stabilizing joints. A common injury (sprain)
occurs when ligaments are stretched or torn .
8. Blood pressure is recorded as two values. The pressure
exerted on arterial walls during ventricular contraction is known
as:
A) Diastolic pressure
B) Pulse pressure
4
