50 ATI TEAS Exam Practice Questions
1.
If the volume of a spherical cell is calculated using the formula V = (4/3)πr³, what does 'r'
represent in this context?
❖ Radius
❖ Diameter
❖ Circumference
❖ Surface area
2.
Which of the following correctly identifies the two primary divisions of the nervous system?
❖ Central nervous system and peripheral nervous system
❖ Somatic nervous system and autonomic nervous system
❖ Central nervous system and enteric nervous system
❖ Peripheral nervous system and sympathetic nervous system
3.
Activated helper T-cells release which of the two following to stimulate other immune cells?
❖ Granzymes
❖ Cytokines
❖ Perforins
❖ Interleukins
❖ B and D
❖ A and C
4.
What substance plays a crucial role in releasing H+ ions to help stabilize blood pH levels when
they increase?
❖ Bicarbonate
❖ Hemoglobin
❖ Ammonia
❖ Carbonic acid
5.
What type of bond contributes to the high stability of nitrogen gas (N2) in its molecular
structure?
, ❖ Single covalent bonds
❖ Double covalent bonds
❖ Triple covalent bonds
❖ Polar covalent bonds
6.
Which of the following is the response to the release of the antidiuretic hormone (ADH)?
❖ Urine volume increases.
❖ Positive feedback occurs leading to the release of more ADH.
❖ Water reabsorption increases at the collecting duct.
❖ Blood osmolarity increases.
7.
What is the primary function of the epiglottis during the swallowing process?
❖ To produce sound
❖ To prevent food from entering the trachea
❖ To facilitate breathing
❖ To aid in digestion
8.
The bicarbonate buffer system in the blood is represented by the equation:
❖ CO2 (g) + H2CO3 (aq) --> H2O (l) --> H+ (aq) + HCO3- (aq)
❖ H2CO3 (aq) + H2O (l) --> CO2 (g) --> H+ (aq) + HCO3- (aq)
❖ HCO3- (aq) + CO2 (g) --> H2O (l)
❖ CO2 (g) + H2O (l) --> H2CO3 (aq) --> H+ (aq) + HCO3- (aq)
9.
What is the primary mechanism by which carbon dioxide is expelled from the bloodstream into
the alveoli during respiration?
A) Osmosis through cell membranes
B) Diffusion along a pressure gradient
C) Active transport requiring ATP
D) Filtration through capillary walls
10.
What is the primary effect of a catalyst on the activation energy of a chemical reaction?
1.
If the volume of a spherical cell is calculated using the formula V = (4/3)πr³, what does 'r'
represent in this context?
❖ Radius
❖ Diameter
❖ Circumference
❖ Surface area
2.
Which of the following correctly identifies the two primary divisions of the nervous system?
❖ Central nervous system and peripheral nervous system
❖ Somatic nervous system and autonomic nervous system
❖ Central nervous system and enteric nervous system
❖ Peripheral nervous system and sympathetic nervous system
3.
Activated helper T-cells release which of the two following to stimulate other immune cells?
❖ Granzymes
❖ Cytokines
❖ Perforins
❖ Interleukins
❖ B and D
❖ A and C
4.
What substance plays a crucial role in releasing H+ ions to help stabilize blood pH levels when
they increase?
❖ Bicarbonate
❖ Hemoglobin
❖ Ammonia
❖ Carbonic acid
5.
What type of bond contributes to the high stability of nitrogen gas (N2) in its molecular
structure?
, ❖ Single covalent bonds
❖ Double covalent bonds
❖ Triple covalent bonds
❖ Polar covalent bonds
6.
Which of the following is the response to the release of the antidiuretic hormone (ADH)?
❖ Urine volume increases.
❖ Positive feedback occurs leading to the release of more ADH.
❖ Water reabsorption increases at the collecting duct.
❖ Blood osmolarity increases.
7.
What is the primary function of the epiglottis during the swallowing process?
❖ To produce sound
❖ To prevent food from entering the trachea
❖ To facilitate breathing
❖ To aid in digestion
8.
The bicarbonate buffer system in the blood is represented by the equation:
❖ CO2 (g) + H2CO3 (aq) --> H2O (l) --> H+ (aq) + HCO3- (aq)
❖ H2CO3 (aq) + H2O (l) --> CO2 (g) --> H+ (aq) + HCO3- (aq)
❖ HCO3- (aq) + CO2 (g) --> H2O (l)
❖ CO2 (g) + H2O (l) --> H2CO3 (aq) --> H+ (aq) + HCO3- (aq)
9.
What is the primary mechanism by which carbon dioxide is expelled from the bloodstream into
the alveoli during respiration?
A) Osmosis through cell membranes
B) Diffusion along a pressure gradient
C) Active transport requiring ATP
D) Filtration through capillary walls
10.
What is the primary effect of a catalyst on the activation energy of a chemical reaction?
