Browse all practice questions for the ATI Test of Essential Academic Skills (TEAS) Practice Test. Search by topic, open any question and review its full explanation, then test yourself in the practice quiz.

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  • Which gland is considered an endocrine organ?
  • In anatomy, what does the term "proximal" refer to?
  • What does the term "accurate" mean in a scientific context?
  • What does deductive reasoning start with?
  • What is the most abundant gas in the Earth's atmosphere?
  • What is the main function of the spleen?
  • What is a primary function of the ileum in the digestive tract?
  • What is the primary source of energy for the body's cells?
  • What is the function of the small intestine in digestion?
  • Which type of nucleic acid is stable under alkaline conditions?
  • What does the cardiovascular system primarily transport?
  • Which of the following is a large molecule composed of amino acids?
  • What is the difference between an acid and a base in chemistry?
  • What membrane covers the lungs?
  • Which term best describes a substance that cannot be broken down into simpler substances?
  • What is the primary function of white blood cells?
  • What happens to carbon dioxide and blood pH levels during hyperventilation?
  • What is the primary role of the best-adapted offspring in natural selection?
  • What is the equivalent of 'Deci' in the metric system?
  • In cellular biology, what is the primary outcome of meiosis?
  • Which gas is a byproduct of respiration?
  • What type of bond stabilizes the double helix structure of DNA?
  • During measurement, what is expected of both accuracy and precision?
  • What is the primary purpose of meiosis in living organisms?
  • Is blood pressure primarily atrial or ventricular?
  • What organ is primarily responsible for detoxification in the body?
  • Where do T-cells mature in the human body?
  • What is the main role of amylase in the digestive system?
  • How is the momentum of an object calculated?
  • What is the main role of the urinary system?
  • Which of the following systems includes skin, hair, and nails?
  • What is the primary function of the components of the respiratory system?
  • What type of reaction involves the exchange of ions and results in the formation of new products?
  • What is the term for the largest part of the brain?
  • What is the primary component of the cell membrane?
  • What is the main function of the muscular system?
  • What unit is used to measure frequency?
  • Blood formation occurs primarily in which part of the skeletal system?
  • What type of joint is a ball and socket joint classified as?
  • What role do primary consumers play in a food chain?
  • Which of the following enzymes breaks down complex carbohydrates?
  • What is the primary function of the digestive system?
  • What is the medical term for high blood pressure?
  • In which anatomical position is the term "distal" typically used?
  • Which of the following hormones is produced in the ovaries?
  • Which observation provides the strongest evidence that chloroplasts originated from cyanobacteria?
  • Which part of the nervous system is typically involved in processing external stimuli?
  • What type of cells are produced through meiosis?
  • Power is calculated as the ratio of which two quantities?
  • What is the common unit of measure for blood pressure?
  • Which type of skin cell provides waterproofing for the outer skin layers?
  • What system does the spleen primarily function in?
  • In a chemical reaction, what is the substance formed as a result?
  • What is the correct sequence of the steps in natural selection?
  • What is the term for organisms that make their own food?
  • What is the role of the hypothalamus in the body's temperature regulation?
  • Which of the following molecules, if present in urine, indicates a problem with kidney function?
  • What term refers to the genetic makeup of an organism?
  • Which of the following structures is an irregularly shaped bone?
  • How many milliliters are in one liter?
  • Which of the following types of joints are considered freely movable?
  • What is the primary purpose of the skeletal system?
  • What is the correct formula for a simple replacement reaction?
  • Which system in the human body is responsible for producing hormones?
  • Which organ system is primarily responsible for transporting nutrients and oxygen to cells?
  • Which layer of the epidermis provides protection against UV radiation?
  • Which type of reasoning involves drawing specific conclusions from general premises?
  • In which of the following structures does the exchange of gases occur in the respiratory system?
  • Which of the following connects bone to muscle?
  • What is the main function of red blood cells?
  • In the hierarchical classification of organisms, which rank is largest?
  • Where are T Cells produced and matured in the human body?
  • Which structure is NOT part of the rib cage?
  • What measurement describes how close a measurement is to the true value?
  • What is the primary function of the thymus gland in relation to T Cells?
  • What is the primary cause of infectious diseases?
  • In statistics, what is the mean?
  • Which organ is primarily responsible for gas exchange in the respiratory system?
  • What is the scientific term for a change of state from a liquid to a gas?
  • What does facilitated diffusion require for the movement of substances?
  • Which organ is the largest in the human body?
  • Which cells are responsible for producing antibodies when triggered by a vaccine?
  • Which part of the neuron receives signals from other neurons?
  • In the food chain 'Seaweed -- Snail -- Fish -- Dolphin', what trophic level do snails belong to?
  • Which of the following is NOT classified as a lymphoid organ?
  • Which of the following is known as the "voice box" in the respiratory system?
  • What is best studied using an electron microscope?
  • What type of disease is characterized by uncontrolled cell division?
  • Which food source mainly provides urea filtered from the blood by the kidneys?
  • What is the medical term for inflammation of the joints?
  • What unit of measurement is commonly used to indicate pH levels?
  • What type of bond involves the sharing of electron pairs between atoms?
  • Which of the following structures plays a crucial role in the filtration process in kidneys?
  • What is the primary role of platelets in the blood?
  • What does the digestive system primarily absorb?
  • What does the medulla oblongata control?
  • What is the equivalent of 'Milli' in the metric system?
  • Which system allows for the delivery of nutrients to tissues?
  • Which of the following terms refers to the classification rank directly below 'Order'?
  • Which structure carries both sperm and urine out of the body?
  • Which structure in the urinary system stores urine until excretion?
  • Which system is primarily responsible for processing foods and absorbing nutrients?
  • Pancreatic cells are abundant in which organelle to meet protein production demands?
  • Which organ is responsible for producing bile in humans?
  • Which component of proteins is broken down to form urea?
  • What is the primary function of the lymphatic system?
  • Which of the following cells is primarily involved in the immune response?
  • What is the primary role of the hypothalamus in the body?
  • Which of the following describes a liquid with a pH of 7?
  • What is a key feature of mitosis?
  • What is the role of neurotransmitters in the nervous system?
  • In which region of the kidney is the glomerulus found?
  • Which body system includes the skin, hair, and nails?
  • Which organ is responsible for pumping blood throughout the body?
  • What is the primary role of the nervous system?
  • The nephridium in worms performs a function similar to which organ in humans?
  • Which neurotransmitter stimulates skeletal muscle contraction at the neuromuscular junction?
  • What is the purpose of vaccination?
  • What is the standard unit for measuring energy?
  • What substance is produced by the liver and helps to digest fats?
  • What is the pH level of pure water?
  • What type of bond is responsible for forming the backbone of the DNA molecule?
  • What does the prefix 'Kilo' represent in the metric system?
  • In genetics, what do the letters in a Punnett square represent?
  • What does the number of neutrons in an atom give information about?
  • How many daughter cells result from meiosis?
  • What is the equivalent of 'Centi' in the metric system?
  • Which of the following substances begins digestion in the small intestine?
  • What function does the integumentary system primarily serve?
  • During which stage of embryological development are the main germ layers (ectoderm, endoderm, and mesoderm) formed?
  • What is responsible for transporting hormones within the body?
  • What is the primary cause of cell differentiation?
  • What is a characteristic of an alkaline solution?
  • What term describes the physical and chemical processes that occur within a living organism?
  • What process occurs after telophase in cell division?
  • Which of the following choices would predominantly contribute to the formation of urea for kidney filtration?
  • What is the function of enzymes in biological processes?
  • Which substance is commonly measured to evaluate kidney function?
  • A cross between two heterozygous F1 plants produces a 15:1 ratio in the F2 generation. What type of ratio is this?
  • What is typically true about the base of pH?
  • Which form of energy is measured in joules?
  • What is the main purpose of the respiratory system?
  • What type of solution is produced by adding an acid to water?
  • Which of the following structures helps regulate the pH of blood?
  • What are patellae categorized as?
  • Which of the following glands is part of the endocrine system?
  • In which area does the breakdown of protein begin in the human body?
  • What type of biomolecule produces ammonia through deamination in the liver?
  • What is the primary feature of a solution classified as basic?
  • What is the primary function of the mitochondria?
  • What is the role of the pancreas in the digestive system?
  • What bodily process is regulated by insulin?
  • Which hormone is primarily responsible for the development of female secondary sexual characteristics?
  • What is the function of ribosomes?
  • What is the primary function of the kidneys?
  • What is an antigen?
  • What is the primary function of the circulatory system?
  • What is the primary role of chlorophyll in plants?
  • What does the prefix 'Deca' represent in the metric system?
  • What type of bond is formed when two atoms share electrons?
  • What determines if an atomic particle has a positive, negative, or neutral charge?
  • Which vitamin is essential for the synthesis of collagen?
  • Which nervous system directs skeletal muscles to respond in the body's fight-or-flight response?
  • What is the role of transmembrane integral proteins in facilitated diffusion?
  • What does a measurement's precision indicate?
  • Which body system is correctly paired with its function?
  • What carries the genetic information in cells?
  • What term describes a substance that donates protons in a chemical reaction?
  • What role do the kidneys play in homeostasis?
  • Which part of the brain is primarily responsible for coordination and balance?
  • Which enzyme breaks down dietary fats?
  • What process do plants use to convert sunlight into energy?
  • During which phase of the cell cycle does the duplication of chromosomes occur?
  • Which body system is responsible for temperature regulation?
  • What structure connects the kidneys to the bladder?
  • Which protein, along with actin, forms the bands in muscle sarcomeres?
  • What term refers to the amount of matter in an object?
  • Which of the following is an example of an organic molecule?
  • What is the primary role of the kidneys?
  • When an enzyme is degraded into its monomeric structural units, the monomers will be:
  • Which organ is involved in the production of sperm?
  • What type of muscle is involuntary and found in the walls of organs?
  • What effect does hyperventilation have on carbon dioxide levels in the blood?
  • What is the basic unit of life?
  • What is the primary function of ribosomes in a cell?
  • What is the result of a covalent bond in terms of atomic interaction?
  • What is the outcome of cytokinesis?
  • What is the primary purpose of the skeletal system?
  • Which organ is NOT part of the reproductive system in females?
  • Which of the following is an example of an intensive property?
  • What component of the human body primarily functions in waste filtration from the blood?
  • Which structure produces progesterone to prepare the uterus for pregnancy?
  • What part of the brain is responsible for coordination and balance?
  • In human anatomy, how many bones are there in an adult human skeleton?
  • Which part of the brain is primarily involved in memory storage?
  • Which term describes a chemical that absorbs protons?
  • What substance do kidneys remove from the blood?
  • Which of the following is part of the small intestine?
  • What is the name for a solution that has a pH lower than 7?
  • During which stage of meiosis do homologous chromosomes exchange genetic information?
  • What is the structure of an enzyme primarily made of?
  • In a balanced chemical equation, what must be equal on both sides?
  • What is meiosis characterized as?
  • Which part of the kidney is primarily responsible for filtration?
  • What characteristic of an atom is determined by the number of protons?
  • Fermentation is described as which type of process?
  • What type of traits do offspring have according to the process of natural selection?
  • Which organelle is primarily involved in the synthesis of lipids?
  • Which system is primarily responsible for support and movement of the body?
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