TEAS Science Practice Test #3 3 Flashcards
6 cards from real TEAS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 TEAS Science Practice Test #3 3 flashcards as text
What is the primary function of the large intestine?
Answer: To absorb water and electrolytes, forming solid waste
The large intestine (colon) primarily absorbs water and electrolytes from indigestible food matter, transforming liquid waste into solid feces for elimination. Most nutrient absorption occurs in the small intestine.
Which of the following describes a dominant allele?
Answer: An allele that is always expressed when present, even with only one copy
A dominant allele is one that is expressed in the phenotype whenever it is present — whether in one copy (heterozygous) or two copies (homozygous dominant). A recessive allele is only expressed when two copies are present.
Which of the following correctly describes the role of enzymes?
Answer: Enzymes are biological catalysts that speed up chemical reactions without being consumed
Enzymes are proteins that act as biological catalysts — they lower the activation energy needed for a chemical reaction to occur and are not consumed in the process, so they can be used repeatedly.
What is the function of the trachea?
Answer: To conduct air from the larynx to the bronchi
The trachea (windpipe) is a cartilaginous tube that conducts inhaled air from the larynx (voice box) downward to the bronchi, which then branch into the lungs. It is lined with cilia and mucus to help filter debris.
Which of the following is an example of a chemical property?
Answer: Flammability
A chemical property describes a substance's ability to undergo a chemical change or reaction. Flammability (tendency to burn) is a chemical property. Density, melting point, and color are physical properties that can be observed without changing the chemical composition.
What is the role of the sinoatrial (SA) node in the heart?
Answer: To initiate the electrical impulse that causes the heart to contract
The SA node, located in the right atrium, is the natural pacemaker of the heart. It generates the electrical impulse that spreads across the atria, causing them to contract, then travels to the AV node and through the ventricles.