ATI TEAS SCIENCE 7 – 200 QUESTION
CERTIFICATION
PRACTICE EXAM: 200 Questions Covering
Anatomy, Biology, Chemistry & Reasoning
Introduction
Welcome to this comprehensive ATI TEAS Science practice exam. Designed to
mirror the format, difficulty, and content areas of the official TEAS (Test of
Essential Academic Skills) exam, this resource covers Human Anatomy &
Physiology, Biology, Chemistry, and Scientific Reasoning. Each question includes
a bolded correct answer and an italicized rationale to reinforce key concepts. Use
this exam to identify strengths, target weak areas, and build confidence for test
day. Work through all 200 questions sequentially or by topic. Good luck!
Human Anatomy & Physiology (100 Questions)
1. Which of the following is the primary function of the ribosomes?
• A) Lipid synthesis
• B) Protein synthesis
• C) ATP production
• D) DNA replication
Ribosomes are the site of translation, where mRNA is decoded to assemble amino
acids into polypeptide chains (proteins).
2. Blood entering the pulmonary artery is:
• A) Oxygen-rich
• B) Oxygen-poor
• C) Carbon dioxide-poor
• D) High in nutrients
The pulmonary artery carries deoxygenated blood from the right ventricle to the
lungs for oxygenation.
3. Which hormone regulates blood glucose by promoting cellular uptake of glucose?
,A) Insulin
B) Glucagon
C) Cortisol
D) Epinephrine
Insulin, secreted by beta cells of the pancreas, lowers blood glucose by facilitating
glucose entry into cells.
4. The functional unit of the kidney is the:
A) Alveolus
B) Nephron
C) Neuron
D) Sarcomere
Each kidney contains over 1 million nephrons that filter blood, reabsorb nutrients,
and excrete waste as urine.
5. Which part of the brain controls balance and coordination?
A) Cerebrum
B) Cerebellum
C) Brainstem
D) Hypothalamus
The cerebellum receives proprioceptive and vestibular input to fine-tune motor
movements and maintain posture.
6. What type of joint is the elbow?
A) Ball-and-socket
B) Hinge
C) Pivot
D) Saddle
A hinge joint allows flexion and extension in one plane, like opening and closing a
door.
7. Which layer of the skin contains blood vessels and nerve endings?
A) Epidermis
B) Dermis
,C) Hypodermis
D) Stratum corneum
The dermis is the vascularized connective tissue layer housing hair follicles, glands,
and sensory receptors.
8. The sinoatrial (SA) node is known as the:
A) Pacemaker of the heart
B) Conduction pathway to ventricles
C) Valve between atria and ventricles
D) Muscle of the aorta
The SA node spontaneously depolarizes, setting the heart’s intrinsic rhythm.
9. Which of the following is an accessory organ of the digestive system?
A) Stomach
B) Liver
C) Esophagus
D) Small intestine
Accessory organs (liver, gallbladder, pancreas) aid digestion but food does not
pass through them.
10. Red blood cell production (erythropoiesis) is stimulated by:
A) Insulin
B) Erythropoietin (EPO)
C) Thyroxine
D) Aldosterone
EPO, released by kidneys in response to low oxygen, signals bone marrow to
increase RBC synthesis.
11. Which valve prevents backflow into the left ventricle?
A) Tricuspid valve
B) Pulmonary semilunar valve
C) Aortic semilunar valve
, D) Mitral valve
The aortic valve opens during ventricular systole and closes during diastole to stop aortic
backflow into the left ventricle.
12. Breathing is primarily controlled by the:
A) Cerebrum
B) Medulla oblongata
C) Spinal cord
D) Pons
The medulla’s dorsal and ventral respiratory groups generate rhythmic signals to the
diaphragm and intercostals.
13. Which of the following is a function of the skeletal system?
A) Thermoregulation
B) Production of digestive enzymes
C) Mineral storage (calcium, phosphorus)
D) Synthesis of antibodies
Bones store 99% of the body’s calcium, releasing it as needed for nerve
transmission and muscle contraction.
14. Where does fertilization typically occur in the female reproductive tract?
A) Uterus
B) Fallopian tube (ampulla)
C) Vagina
D) Ovary
The ampulla of the uterine tube is the common site where sperm meets the
ovulated secondary oocyte.
15. Which hormone triggers ovulation?
A) Estrogen
CERTIFICATION
PRACTICE EXAM: 200 Questions Covering
Anatomy, Biology, Chemistry & Reasoning
Introduction
Welcome to this comprehensive ATI TEAS Science practice exam. Designed to
mirror the format, difficulty, and content areas of the official TEAS (Test of
Essential Academic Skills) exam, this resource covers Human Anatomy &
Physiology, Biology, Chemistry, and Scientific Reasoning. Each question includes
a bolded correct answer and an italicized rationale to reinforce key concepts. Use
this exam to identify strengths, target weak areas, and build confidence for test
day. Work through all 200 questions sequentially or by topic. Good luck!
Human Anatomy & Physiology (100 Questions)
1. Which of the following is the primary function of the ribosomes?
• A) Lipid synthesis
• B) Protein synthesis
• C) ATP production
• D) DNA replication
Ribosomes are the site of translation, where mRNA is decoded to assemble amino
acids into polypeptide chains (proteins).
2. Blood entering the pulmonary artery is:
• A) Oxygen-rich
• B) Oxygen-poor
• C) Carbon dioxide-poor
• D) High in nutrients
The pulmonary artery carries deoxygenated blood from the right ventricle to the
lungs for oxygenation.
3. Which hormone regulates blood glucose by promoting cellular uptake of glucose?
,A) Insulin
B) Glucagon
C) Cortisol
D) Epinephrine
Insulin, secreted by beta cells of the pancreas, lowers blood glucose by facilitating
glucose entry into cells.
4. The functional unit of the kidney is the:
A) Alveolus
B) Nephron
C) Neuron
D) Sarcomere
Each kidney contains over 1 million nephrons that filter blood, reabsorb nutrients,
and excrete waste as urine.
5. Which part of the brain controls balance and coordination?
A) Cerebrum
B) Cerebellum
C) Brainstem
D) Hypothalamus
The cerebellum receives proprioceptive and vestibular input to fine-tune motor
movements and maintain posture.
6. What type of joint is the elbow?
A) Ball-and-socket
B) Hinge
C) Pivot
D) Saddle
A hinge joint allows flexion and extension in one plane, like opening and closing a
door.
7. Which layer of the skin contains blood vessels and nerve endings?
A) Epidermis
B) Dermis
,C) Hypodermis
D) Stratum corneum
The dermis is the vascularized connective tissue layer housing hair follicles, glands,
and sensory receptors.
8. The sinoatrial (SA) node is known as the:
A) Pacemaker of the heart
B) Conduction pathway to ventricles
C) Valve between atria and ventricles
D) Muscle of the aorta
The SA node spontaneously depolarizes, setting the heart’s intrinsic rhythm.
9. Which of the following is an accessory organ of the digestive system?
A) Stomach
B) Liver
C) Esophagus
D) Small intestine
Accessory organs (liver, gallbladder, pancreas) aid digestion but food does not
pass through them.
10. Red blood cell production (erythropoiesis) is stimulated by:
A) Insulin
B) Erythropoietin (EPO)
C) Thyroxine
D) Aldosterone
EPO, released by kidneys in response to low oxygen, signals bone marrow to
increase RBC synthesis.
11. Which valve prevents backflow into the left ventricle?
A) Tricuspid valve
B) Pulmonary semilunar valve
C) Aortic semilunar valve
, D) Mitral valve
The aortic valve opens during ventricular systole and closes during diastole to stop aortic
backflow into the left ventricle.
12. Breathing is primarily controlled by the:
A) Cerebrum
B) Medulla oblongata
C) Spinal cord
D) Pons
The medulla’s dorsal and ventral respiratory groups generate rhythmic signals to the
diaphragm and intercostals.
13. Which of the following is a function of the skeletal system?
A) Thermoregulation
B) Production of digestive enzymes
C) Mineral storage (calcium, phosphorus)
D) Synthesis of antibodies
Bones store 99% of the body’s calcium, releasing it as needed for nerve
transmission and muscle contraction.
14. Where does fertilization typically occur in the female reproductive tract?
A) Uterus
B) Fallopian tube (ampulla)
C) Vagina
D) Ovary
The ampulla of the uterine tube is the common site where sperm meets the
ovulated secondary oocyte.
15. Which hormone triggers ovulation?
A) Estrogen
