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NLN PAX
NLN PAX SCIENCE VERSION 3 (NEW
2025/ 2026 UPDATE) QUESTIONS &
ANSWERS| GRADE A| 100% CORRECT
(VERIFIED SOLUTIONS)
Where does most digestion and absorption of nutrients occur in the body? - ANS
✓small intestine
What enzymes help carbohydrates turn into glucose? - ANS ✓amylase, sucrase,
and maltase
What are the 4 chambers of the heart? - ANS ✓left and right atrium and left and right
ventricles
What is the first step in blood flow through the heart? - ANS ✓blood enters the right
atrium from the veins called superior vena cava and inferior vena cava
What is the purpose of valves in the heart? - ANS ✓to prevent back flow when the
ventricles contract
What is the last step in blood flow through the heart? - ANS ✓the aorta
When the heart contracts, the pressure ________ - ANS ✓increases (systole)
NLN PAX
, 2
NLN PAX
When the heart relaxes, the pressure _______ - ANS ✓lowers (diastole)
Is blood considered a connective tissue? - ANS ✓yes
What is an oxygen carrier in the RBC? - ANS ✓hemoglobin
What happens when the number of wbcs exceeds the normal concentration? - ANS
✓infection
What blood vessel transports blood away from the heart? - ANS ✓arteries
What blood vessel transports blood to the heart? - ANS ✓veins
(T/F) deoxygenated blood arrives at the lung via the pulmonary arteries - ANS ✓true
What is produced during anaerobic respiration and causes sore muscles after
exercise? - ANS ✓lactic acid
What are the 3 types of neurons? - ANS ✓sensory neurons, interneurons, and motor
neurons
Sensory neurons - ANS ✓transmit impulses from sense organs and receptors
Interneurons - ANS ✓make up the brain ad spinal cord
NLN PAX
NLN PAX
NLN PAX SCIENCE VERSION 3 (NEW
2025/ 2026 UPDATE) QUESTIONS &
ANSWERS| GRADE A| 100% CORRECT
(VERIFIED SOLUTIONS)
Where does most digestion and absorption of nutrients occur in the body? - ANS
✓small intestine
What enzymes help carbohydrates turn into glucose? - ANS ✓amylase, sucrase,
and maltase
What are the 4 chambers of the heart? - ANS ✓left and right atrium and left and right
ventricles
What is the first step in blood flow through the heart? - ANS ✓blood enters the right
atrium from the veins called superior vena cava and inferior vena cava
What is the purpose of valves in the heart? - ANS ✓to prevent back flow when the
ventricles contract
What is the last step in blood flow through the heart? - ANS ✓the aorta
When the heart contracts, the pressure ________ - ANS ✓increases (systole)
NLN PAX
, 2
NLN PAX
When the heart relaxes, the pressure _______ - ANS ✓lowers (diastole)
Is blood considered a connective tissue? - ANS ✓yes
What is an oxygen carrier in the RBC? - ANS ✓hemoglobin
What happens when the number of wbcs exceeds the normal concentration? - ANS
✓infection
What blood vessel transports blood away from the heart? - ANS ✓arteries
What blood vessel transports blood to the heart? - ANS ✓veins
(T/F) deoxygenated blood arrives at the lung via the pulmonary arteries - ANS ✓true
What is produced during anaerobic respiration and causes sore muscles after
exercise? - ANS ✓lactic acid
What are the 3 types of neurons? - ANS ✓sensory neurons, interneurons, and motor
neurons
Sensory neurons - ANS ✓transmit impulses from sense organs and receptors
Interneurons - ANS ✓make up the brain ad spinal cord
NLN PAX
