HESI Practice test and Verified Answers 2026
A catalyst increases the rate of reaction by ___________. - anslowering the activation energy
A diploid germ cell containing 72 chromosomes undergoes meiosis. How many chromosomes will be in each
gamete? - ans36
An experiment is performed to measure the temperature of boiling water at sea level. The actual boiling point
in 100C. The data taken during the experiment show values of 104.6C, 104.5C, and 104C. What term best
describes these data? - ansPrecise
An improper balance between calcium and which substance can adversely affect the growth of healthy bone
tissue? - ansphosphorus
At which phase of meiosis does crossing over occur? - ansProphase 1
Bile is secreted into which organ? - ansSmall intestines
Chemical reactions in living systems preceed along catabolic pathways, and there tends to be an increase in
_______/ - ansentropy
Eye movement and papillary reflexes originate in which part of the central nervous system? - ansMidbrain
How could water be boiled at room temperature? - ansLower the pressure
Iodine and carbon dioxide undergo sublimation at room temperature and atmospheric pressure. What is this
process? - ansChanging from a solid to a gas
Phenolphthalein changes from colorless to pink in basic solutions. At what pH value would the solution remain
colorless? - ans8.4
,Redox reactions are those that occur with a transfer of electrons. What would cause an increase in the
oxidation number? - ansOxidation
Segments of a polypeptide chain can coil or fold as a result of hydrogen bonds, adding to a protein's structural
conformation. What is this structure called? - ansSecondary structure
The dermis is classified s a(n) - ansorgan
The function of the pulmonary veins is to carry ________________? - ansoxygenated blood to the left atrium
The Phalynx is a(n) - ansbone
Upper motor neurons originate in which area of the body? - ansMotor area of the cerebral hemispheres
Venous refers to which part of the body system? - ansCirculation
What components of the blood helps maintain glomerular oncotic pressure at a normal level of 33mm Hg,
which in turn keeps a large amount of water from escaping the capillary? - ansProtein
What does parathyroid hormone regulate? - ansCalcium
What does the word 'pulmonary' mean? - anslungs
What is a benefit of water's ability to make hydrogen bonds? - ansHigh specific heat
What is the concentration of 58.5g of a NaCl in 2L of solution (atomic weights of each element are as follows:
Na=23g/mol, CL=35/5 g/mol0? - ans0.5 mol NaCl
, What is the correct electron configuration for neon? - ansIs22s22p6
What is the correct formula for magnesium chloride? - ansMgCl2
What is the correct name of MgSo4? - ansMagnesium sulfate
What is the expected pH of the stomach? - ans0.90 to 1.50
What is the function of aldosterone? - ansConserves sodium in the body
What is the function of glucocorticoids that are secreted from the adrenal cortex? - anscarbohydrate, protein,
and fat metabolism
What is the function of the baroreceptors? - ansDecrease heart rate
What is the ground state electron configuration for zinc? - ansIs22s22s63s23p64s23d10
What is the name for the small, tail-like projection from the cellular membrane that is used for locomotion? -
ansFlagella
What is the primary cause of water molecules moving into or out of the cell? - ansWater molecule pressure
gradient along the cell membrane
What is the primary purpose of the flagella on the surface of cells? - ansMovement of the cell
What is the primary sympathetic neurohormone? - ansnorepinephrine
A catalyst increases the rate of reaction by ___________. - anslowering the activation energy
A diploid germ cell containing 72 chromosomes undergoes meiosis. How many chromosomes will be in each
gamete? - ans36
An experiment is performed to measure the temperature of boiling water at sea level. The actual boiling point
in 100C. The data taken during the experiment show values of 104.6C, 104.5C, and 104C. What term best
describes these data? - ansPrecise
An improper balance between calcium and which substance can adversely affect the growth of healthy bone
tissue? - ansphosphorus
At which phase of meiosis does crossing over occur? - ansProphase 1
Bile is secreted into which organ? - ansSmall intestines
Chemical reactions in living systems preceed along catabolic pathways, and there tends to be an increase in
_______/ - ansentropy
Eye movement and papillary reflexes originate in which part of the central nervous system? - ansMidbrain
How could water be boiled at room temperature? - ansLower the pressure
Iodine and carbon dioxide undergo sublimation at room temperature and atmospheric pressure. What is this
process? - ansChanging from a solid to a gas
Phenolphthalein changes from colorless to pink in basic solutions. At what pH value would the solution remain
colorless? - ans8.4
,Redox reactions are those that occur with a transfer of electrons. What would cause an increase in the
oxidation number? - ansOxidation
Segments of a polypeptide chain can coil or fold as a result of hydrogen bonds, adding to a protein's structural
conformation. What is this structure called? - ansSecondary structure
The dermis is classified s a(n) - ansorgan
The function of the pulmonary veins is to carry ________________? - ansoxygenated blood to the left atrium
The Phalynx is a(n) - ansbone
Upper motor neurons originate in which area of the body? - ansMotor area of the cerebral hemispheres
Venous refers to which part of the body system? - ansCirculation
What components of the blood helps maintain glomerular oncotic pressure at a normal level of 33mm Hg,
which in turn keeps a large amount of water from escaping the capillary? - ansProtein
What does parathyroid hormone regulate? - ansCalcium
What does the word 'pulmonary' mean? - anslungs
What is a benefit of water's ability to make hydrogen bonds? - ansHigh specific heat
What is the concentration of 58.5g of a NaCl in 2L of solution (atomic weights of each element are as follows:
Na=23g/mol, CL=35/5 g/mol0? - ans0.5 mol NaCl
, What is the correct electron configuration for neon? - ansIs22s22p6
What is the correct formula for magnesium chloride? - ansMgCl2
What is the correct name of MgSo4? - ansMagnesium sulfate
What is the expected pH of the stomach? - ans0.90 to 1.50
What is the function of aldosterone? - ansConserves sodium in the body
What is the function of glucocorticoids that are secreted from the adrenal cortex? - anscarbohydrate, protein,
and fat metabolism
What is the function of the baroreceptors? - ansDecrease heart rate
What is the ground state electron configuration for zinc? - ansIs22s22s63s23p64s23d10
What is the name for the small, tail-like projection from the cellular membrane that is used for locomotion? -
ansFlagella
What is the primary cause of water molecules moving into or out of the cell? - ansWater molecule pressure
gradient along the cell membrane
What is the primary purpose of the flagella on the surface of cells? - ansMovement of the cell
What is the primary sympathetic neurohormone? - ansnorepinephrine
