ATI TEAS 7 Nursing Science Exam
2026/2027 | Anatomy, Physiology & Life
Sciences Review
1. Which blood type is considered the universal donor?
A) Type A
B) Type B
C) Type AB
D) Type O
Correct ,,,answer,,,: D
Rationale: Type O blood lacks A and B antigens on its red blood cells, so it will
not trigger an immune response in a recipient of any other blood type. Universal
acceptor is Type AB.
2. Blood oxygen levels are most likely low when blood ________.
A) fills the left atrium
B) fills the right atrium
C) leaves the pulmonary vein
D) enters the aorta
Correct ,,,answer,,,: B
Rationale: The right atrium receives deoxygenated blood from the body via the
superior and inferior vena cava. This blood has low oxygen levels because it has
already circulated through the body, delivering oxygen to tissues.
3. After food has been masticated in the oral cavity, where does it go next?
A) Stomach
,B) Esophagus
C) Pharynx
D) Large intestine
Correct ,,,answer,,,: C
Rationale: After chewing (mastication), the food forms a bolus and is pushed into
the pharynx (throat). The pharynx then directs it into the esophagus, which leads to
the stomach.
4. Where does the majority of nutrient diffusion take place in the digestive system?
A) Stomach
B) Esophagus
C) Oral cavity
D) Small intestine
Correct ,,,answer,,,: D
Rationale: The small intestine is the primary site for both chemical digestion and
nutrient absorption. Its inner lining is covered with villi and microvilli, which
dramatically increase the surface area for absorption into the bloodstream.
5. A person is startled by a bear. Her palms get sweaty and her heart races. Which
part of her nervous system was directly stimulated?
A) Central
B) Parasympathetic
C) Somatic
D) Sympathetic
Correct ,,,answer,,,: D
Rationale: The sympathetic nervous system is responsible for the "fight-or-flight"
response, which includes increased heart rate, sweating, and pupil dilation. This
prepares the body for perceived danger.
,6. Which of the following types of tissues includes cells of the immune system and
of the blood?
A) Epithelial tissue
B) Muscle tissue
C) Nervous tissue
D) Connective tissue
Correct ,,,answer,,,: D
Rationale: Connective tissue supports and connects other tissues. Blood is a fluid
connective tissue containing red blood cells, white blood cells (immune cells), and
platelets. Bone and cartilage are also connective tissues.
7. What structure prevents food from entering the trachea during swallowing?
A) Epiglottis
B) Uvula
C) Pharynx
D) Larynx
Correct ,,,answer,,,: A
Rationale: The epiglottis is a flap of elastic cartilage that folds downward during
swallowing to cover the glottis (opening to the trachea). This prevents aspiration of
food into the lower respiratory tract.
8. Which chamber of the heart pumps oxygenated blood into the systemic
circulation?
A) Right atrium
B) Right ventricle
C) Left atrium
D) Left ventricle
Correct ,,,answer,,,: D
Rationale: The left ventricle pumps oxygenated blood through the aorta to the rest
, of the body (systemic circulation). It has the thickest myocardial wall to generate
the high pressure needed.
9. Which valve prevents backflow of blood from the left ventricle into the left
atrium?
A) Aortic valve
B) Pulmonary valve
C) Mitral (bicuspid) valve
D) Tricuspid valve
Correct ,,,answer,,,: C
Rationale: The mitral (bicuspid) valve is located between the left atrium and left
ventricle. Its two cusps prevent backflow of oxygenated blood into the atrium
during ventricular contraction (systole).
10. The sinoatrial (SA) node is located in which chamber of the heart?
A) Right atrium
B) Left atrium
C) Right ventricle
D) Left ventricle
Correct ,,,answer,,,: A
Rationale: The SA node, also known as the natural pacemaker, is located in the
upper wall of the right atrium. It generates electrical impulses that set the rhythm
for the heartbeat, causing the atria to contract.
11. In which of the following areas does protein breakdown begin in the human
body?
A) Mouth
B) Stomach
C) Small intestine
D) Large intestine
2026/2027 | Anatomy, Physiology & Life
Sciences Review
1. Which blood type is considered the universal donor?
A) Type A
B) Type B
C) Type AB
D) Type O
Correct ,,,answer,,,: D
Rationale: Type O blood lacks A and B antigens on its red blood cells, so it will
not trigger an immune response in a recipient of any other blood type. Universal
acceptor is Type AB.
2. Blood oxygen levels are most likely low when blood ________.
A) fills the left atrium
B) fills the right atrium
C) leaves the pulmonary vein
D) enters the aorta
Correct ,,,answer,,,: B
Rationale: The right atrium receives deoxygenated blood from the body via the
superior and inferior vena cava. This blood has low oxygen levels because it has
already circulated through the body, delivering oxygen to tissues.
3. After food has been masticated in the oral cavity, where does it go next?
A) Stomach
,B) Esophagus
C) Pharynx
D) Large intestine
Correct ,,,answer,,,: C
Rationale: After chewing (mastication), the food forms a bolus and is pushed into
the pharynx (throat). The pharynx then directs it into the esophagus, which leads to
the stomach.
4. Where does the majority of nutrient diffusion take place in the digestive system?
A) Stomach
B) Esophagus
C) Oral cavity
D) Small intestine
Correct ,,,answer,,,: D
Rationale: The small intestine is the primary site for both chemical digestion and
nutrient absorption. Its inner lining is covered with villi and microvilli, which
dramatically increase the surface area for absorption into the bloodstream.
5. A person is startled by a bear. Her palms get sweaty and her heart races. Which
part of her nervous system was directly stimulated?
A) Central
B) Parasympathetic
C) Somatic
D) Sympathetic
Correct ,,,answer,,,: D
Rationale: The sympathetic nervous system is responsible for the "fight-or-flight"
response, which includes increased heart rate, sweating, and pupil dilation. This
prepares the body for perceived danger.
,6. Which of the following types of tissues includes cells of the immune system and
of the blood?
A) Epithelial tissue
B) Muscle tissue
C) Nervous tissue
D) Connective tissue
Correct ,,,answer,,,: D
Rationale: Connective tissue supports and connects other tissues. Blood is a fluid
connective tissue containing red blood cells, white blood cells (immune cells), and
platelets. Bone and cartilage are also connective tissues.
7. What structure prevents food from entering the trachea during swallowing?
A) Epiglottis
B) Uvula
C) Pharynx
D) Larynx
Correct ,,,answer,,,: A
Rationale: The epiglottis is a flap of elastic cartilage that folds downward during
swallowing to cover the glottis (opening to the trachea). This prevents aspiration of
food into the lower respiratory tract.
8. Which chamber of the heart pumps oxygenated blood into the systemic
circulation?
A) Right atrium
B) Right ventricle
C) Left atrium
D) Left ventricle
Correct ,,,answer,,,: D
Rationale: The left ventricle pumps oxygenated blood through the aorta to the rest
, of the body (systemic circulation). It has the thickest myocardial wall to generate
the high pressure needed.
9. Which valve prevents backflow of blood from the left ventricle into the left
atrium?
A) Aortic valve
B) Pulmonary valve
C) Mitral (bicuspid) valve
D) Tricuspid valve
Correct ,,,answer,,,: C
Rationale: The mitral (bicuspid) valve is located between the left atrium and left
ventricle. Its two cusps prevent backflow of oxygenated blood into the atrium
during ventricular contraction (systole).
10. The sinoatrial (SA) node is located in which chamber of the heart?
A) Right atrium
B) Left atrium
C) Right ventricle
D) Left ventricle
Correct ,,,answer,,,: A
Rationale: The SA node, also known as the natural pacemaker, is located in the
upper wall of the right atrium. It generates electrical impulses that set the rhythm
for the heartbeat, causing the atria to contract.
11. In which of the following areas does protein breakdown begin in the human
body?
A) Mouth
B) Stomach
C) Small intestine
D) Large intestine
