TEAS 7 Science Practice Test

Questions and Answers

Experiments cannot validate hypotheses, only falsify them. The statement above can be restated in which of the following ways?

Until disproved, an explanation for an observation is valid.

Proving a hypothesis exempts it from further testing.

A hypothesis that has not been falsified remains provisional. (correct)

Certain concepts cannot be subjected to direct experimentation.

In which of the following regions of the body are the tibia and fibula?

Crural (correct)

Antecubital

Coxal

Tarsal

Which of the following functions does the myelin sheath perform for a nerve cell?

Nutrition

Insulation (correct)

Regeneration

Sensory perception

Which of the following occurs in an oxidation reaction?

Removal of electrons Signup and view all the answers

To accurately measure the density of a series of small irregular solids made of plastic, wood, fiberglass, and glass, a student will need which of the following laboratory tools?

Graduated cylinder, water, weighing balance Signup and view all the answers

Emphysema caused by damage to alveoli from toxins and pollutants is likely to result in the body having difficulty performing which of the following actions?

Exchanging oxygen and carbon dioxide Signup and view all the answers

For which of the following reasons does a chloride ion have a negative charge?

It gained an electron Signup and view all the answers

Which of the following substances is excreted by sweat glands in response to the breakdown of proteins and the formation of ammonia?

Urea Signup and view all the answers

The triple point of a substance is the temperature and pressure at which the substance exists as which of the following?

Simultaneously in solid, liquid, and gas phases Signup and view all the answers

A patient goes to the doctor with a cold and sore throat and asks for antibiotics. The doctor refuses to prescribe antibiotics to the patient because the illness is caused by which of the following pathogens?

Virus Signup and view all the answers

Which of the following is an efferent neuron that is responsible for releasing a neurotransmitter that stimulates a muscle cell to contract?

Motor neuron Signup and view all the answers

Which of the following structures is present in both prokaryotic and eukaryotic cells?

Cell membrane Signup and view all the answers

Which of the following actions allows for repolarization of a neuron?

The opening of potassium channels allowing potassium to leave the neuron Signup and view all the answers

Which of the following structures is an exocrine gland?

Parotid gland Signup and view all the answers

Which of the following is the function of a totipotent cell?

Develops into any kind of cell Signup and view all the answers

Which of the following classes of biological molecules includes enzymes?

Proteins Signup and view all the answers

Which of the following substances is responsible for donating H+ ions to act as a buffer when blood pH rises?

Carbonic acid Signup and view all the answers

Parasitic worm infestation is hypothesized to be damaging to the host. However, scientists have recently discovered that worm infestation can relieve the effects of certain autoimmune disorders. In which of the following ways should the hypothesis be modified, given the new findings?

Worm infestation reduces the severity of certain autoimmune disorders. Signup and view all the answers

Which of the following best describes the result of using a catalyst in a chemical reaction?

The reaction is completed in a shorter amount of time. Signup and view all the answers

An individual suffers severe blunt trauma to the thoracic cavity. Which of the following organs are at greatest risk from this injury?

Heart and lungs Signup and view all the answers

Which of the following is a component of the integumentary system that secretes pheromones?

Apocrine gland Signup and view all the answers

Which of the following processes causes most of the carbon dioxide from the blood to move into the alveoli?

Diffusion down a concentration gradient Signup and view all the answers

Lipids absorbed in the small intestine will first enter which of the following structures?

Lacteal vessels Signup and view all the answers

Which of the following immune system molecules creates holes in the cell membranes of their target cells in order to destroy the cell?

Perforins Signup and view all the answers

Which of the following properties does soap, an emulsifier, have that make it useful for washing dirt off one's hands with water?

Soap's dual polar and nonpolar nature helps bond oil and water Signup and view all the answers

The covalent bonds between the monomers of an enzyme macromolecule are:

Peptide bonds Signup and view all the answers

Which of the following is a protein present in blood plasma?

Fibrinogen Signup and view all the answers

Which of the following describes a genetic mutation that results in uncontrolled division of a single cell within the body?

Cancer Signup and view all the answers

Which of the following tools can be used to measure the turbidity of a liquid by measuring the transmission of light through the sample?

Spectrophotometer Signup and view all the answers

A researcher wants to gather data on the average wing strength of all birds found in the American Northwest. The researcher only has one small net, so all large birds were excluded from the study. The researcher's results were different than expected, but he believes his data include enough birds to estimate the strength of all birds. For which of the following reasons should this data be rejected?

Data are biased by the methodology Signup and view all the answers

If a mother's __________ cell contains mutated DNA, this mutation can be passed to her offspring.

germ Signup and view all the answers

The mitochondrial inner membrane carries out the same function in cellular respiration as the ________ membrane of chloroplasts in photosynthesis.

thylakoid Signup and view all the answers

A study found two processes, Process A and Process B, to be correlated. Which of the following is true for these processes?

The study does not indicate a causal relationship between the processes. Signup and view all the answers

How many times stronger is the hydrogen-ion concentration of a pH 4 solution as compared with a pH 9 solution?

100,000 Signup and view all the answers

Which of the following summarizes a change that takes place as a solid turns to a liquid?

Particles become less ordered. Signup and view all the answers

Genetic information describing the characteristics of an organism is found in which of the following?

Nuclei Signup and view all the answers

Which of the following organs filters excess solutes from the blood?

Kidney Signup and view all the answers

Which of the following is a function of bone?

Storage of minerals Signup and view all the answers

Which of the following ions binds to the troponin complex, initiating the contraction of a muscle?

Calcium Signup and view all the answers

Study Notes

Hypotheses and Experiments

Hypotheses cannot be proven; they are provisional until falsified.
Validity of a hypothesis is maintained until evidence disproves it.

Human Body Regions

Tibia and fibula located in the crural region.

Myelin Sheath Function

Myelin sheath provides insulation for nerve cells, enhancing signal transmission.

Oxidation Reactions

Oxidation involves the removal of electrons from a substance.

Measuring Density

Use a graduated cylinder, water, and weighing balance to measure the density of small irregular solids.

Emphysema Effects

Emphysema impairs the exchange of oxygen and carbon dioxide in the body.

Chloride Ion Charge

A chloride ion has a negative charge because it gained an electron.

Excretion of Urea

Urea is excreted by sweat glands as a byproduct of protein breakdown.

Triple Point Definition

The triple point is where a substance exists simultaneously in solid, liquid, and gas phases.

Antibiotics and Pathogens

Antibiotics are ineffective against viral infections, such as colds and sore throats.

Neuron Types

Motor neurons are efferent neurons that stimulate muscle contraction through neurotransmitter release.

Cell Structures

Cell membranes are present in both prokaryotic and eukaryotic cells, crucial for cell integrity.

Neuron Repolarization

Repolarization occurs via the opening of potassium channels, allowing potassium to exit the neuron.

Exocrine Glands

Parotid gland is an exocrine gland responsible for secreting saliva.

Totipotent Cells

Totipotent cells can differentiate into any type of cell, making them essential in development.

Biological Molecules

Enzymes are classified as proteins, playing key roles in biological reactions.

pH Regulation

Carbonic acid acts as a buffer by donating H+ ions to maintain blood pH.

Worm Infestation Hypothesis

Worm infestation may reduce the severity of certain autoimmune disorders.

Catalyst Function

Catalysts speed up chemical reactions, reducing the time required for the reaction to occur.

Thoracic Injury Risks

Heart and lungs are at greatest risk from severe trauma to the thoracic cavity.

Integumentary System

Apocrine glands in the integumentary system secrete pheromones relevant to chemical signaling.

Carbon Dioxide Movement

Carbon dioxide moves into alveoli primarily through diffusion down a concentration gradient.

Lipid Absorption

Lipids absorbed in the small intestine enter the lacteal vessels first, aiding fat transport.

Immune System Molecules

Perforins create holes in target cell membranes, leading to cell destruction.

Soap Properties

Soap's dual polar and nonpolar nature facilitates the bonding of oil and water, aiding in cleaning.

Enzyme Bonds

Enzyme macromolecules contain peptide bonds between monomers, crucial for structure.

Blood Plasma Proteins

Fibrinogen is a key protein found in blood plasma, essential for blood clotting.

Genetic Mutations

Cancer results from uncontrolled division of a single mutated cell.

Measuring Turbidity

A spectrophotometer measures turbidity by analyzing light transmission through a liquid.

Biased Research Data

Excluding large birds from a study creates bias, invalidating the results.

Mutated DNA Inheritance

Mutated DNA in germ cells can be passed to the offspring, affecting future generations.

Mitochondrial and Chloroplast Function

The mitochondrial inner membrane functions similarly to the thylakoid membrane in chloroplasts regarding energy conversion.

Correlation in Studies

Correlation between two processes does not imply causation, necessitating careful interpretation of results.

pH Concentration Difference

The hydrogen-ion concentration of a pH 4 solution is 100,000 times stronger than that of a pH 9 solution.

Solid to Liquid Change

As a solid becomes a liquid, particles become less ordered, increasing molecular mobility.

Location of Genetic Information

Genetic characteristics of an organism are stored in the nuclei of cells.

Kidney Function

Kidneys filter excess solutes from the blood, playing a vital role in homeostasis.

Bone Functions

Bones store minerals, contributing to the body's mineral balance.

Muscle Contraction Initiation

Calcium ions bind to the troponin complex, triggering muscle contraction mechanisms.

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Description

Prepare for the TEAS 7 exam with this science practice test focusing on hypothesis validation and experimentation. Test your knowledge of scientific principles and reasoning with these flashcards. Enhance your understanding of key concepts to excel in the exam.