ATI TEAS EXAM 2
An atom of lithium has 3 protons, 4 neutrons, and 3 electrons. What is this atom's mass number?
7
Which of the following statements correctly describes the relationship between genes and chromosomes?
genes are DNA sequences found on chromosomes
In human blood types, A and B alleles are codominant and O is recessive. Which of the following combinations of the parents' genotypes has the highest probability of producing a child with blood type O?
AO and BO
Which component of a phospholipid gives it nonpolar characteristics?
Carbon-hydrogen chains Carbon-hydrogen chains do not have electronegative atoms and confer nonpolarity on the tails of phospholipids.
If an intensive property is independent of the amount of the material being measured, which of the following is an example of an intensive property?
Density is a ratio of material present in a given volume. Water will have the same density whether in a bucket or in a cup. It is independent of the amount of material. Therefore, it is an intensive property.
Which of the following actions are controlled by the autonomic nervous system? (Select all that apply.)
Heart rate increases while running is correct. Heart rate is controlled by the sympathetic branch of the autonomic nervous system .Hand is withdrawn quickly after touching a hot surface is incorrect. Withdrawing a hand from a hot surface is a withdrawal reflex, which is a type of somatic reflex. This reflex is initiated by an external stimulus and is processed from the spinal cord directly to the muscles of the hand, thereby causing them to contract. This type of reflex is not controlled by the autonomic nervous system. Stomach muscles contract to aid digestion is correct. Muscles of the stomach are controlled by the parasympathetic branch of the autonomic nervous system. Salivary glands release secretions in response to the presence of food is correct. Salivary glands responding to the presence of food is controlled by the parasympathetic branch of the autonomic nervous system. Blood vessels constrict to reduce the flow of blood to the skin is correct. The constriction and relaxation of blood vessels is controlled by the sympathetic branch of the autonomic nervous system.
Which of the following chemical bonds is found within a molecule of ammonia, NH3, given that N is a highly electronegative element and has a valence of 5?
Nitrogen is more electronegative than hydrogen, leading to an unequal sharing of electrons, which is the definition of polar covalent bonds.
A student placed 20 mL NaOH solution in a beaker and added 5 mL of HCl to it. Which of the following would happen when the two substances are mixed?
PH of the new solution is reduced
Which of the following options lists the correct order of events in a signaling pathway in a feedback loop used to maintain homeostasis?
This answer is correct because a stimulus is the initial signal detected by a receptor. Information received is sent to the nervous system and an effector is used to achieve a response.
Which of the following is an element typically used in research papers that requires a citation to be credible?
abstract
Which of the following procedures is an appropriate negative control for testing the hypothesis that air contains bread mold spores?
bread in a sealed container
The focus of this paper is the definition and diagnosis of ADHD in children only. Several PubMed research articles that were published between August 2010 and August 2019 were reviewed. Articles about medications for ADHD were omitted because they were not relevant to the scope of this paper.Which of the following is a likely claim made by the paper?
children typically begin exhibiting symptoms of ADHD around the age of 6, with notable differences among various socioeconomic statuses
Which of the following is a type of specialized antigen-processing cell that activates T-cells of the immune system?
dendritic cells Dendritic cells process antigens and display them on surface receptors to helper T-cells of the immune system. Helper T-cells then activate cytotoxic T-cells and B-cells. Therefore, dendritic cells link the passive and active immune system.
Which of the following is the main function of bile juices?
emulsifying fats
Which of the following statements is correct regarding the organisms in which photosynthesis and oxidative respiration occur?
photosynthesis occurs in bacteria, certain protists, and plants, and oxidative respiration occurs in bacteria, protists, plants, animals, and funngi
which of the following properties of water explains its characterization as the universal solvent?
polarity of water molecules
Which of the following statements best explains why RNA inside a cell is almost never found as a single-stranded molecule?
short stretches of complementary sequences can cause RNA to fold back on itself
Which of the following is the circular muscle that regulates the opening and closing of a body aperture?
sphincter
Acid reflux is a condition in which the gastric juices of the stomach flow backward into the esophagus. Which of the following causes acid reflux?
the cardiac sphincter does not close tightly
Which of the following is true of enzyme-catalyzed reactions?
the enzyme is not consumed int he reaction
Which of these terms specifically means the intake and expulsion of air using the lungs?
ventilation
A blood pressure reading of 120/70 mm Hg refers to arterial pressures recorded during which of the following events?
ventricular contraction/ventricular relaxation