Which of these organs is not considered an accessory digestive structure?
A. mouth
B. salivary glands
C. pancreas
D. liver
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Accessory organs of the digestive system comprise of organs that empty secretions into the alimentary canal. These organs include salivary glands, liver, gallbladder and pancreas. The mount if path of the alimentary canal.
Therefore, the Correct Answer is A.
More Questions on Custom TEAS Science Practice Test 1
Question 1:
Which of the following indicates the function of sodium bicarbonate released by the pancreas?
A. Sodium bicarbonate inhibits peristalsis
B. Sodium bicarbonate is a protease that digests carbohydrates
C. Sodium bicarbonate stimulates the pyloric sphincter
D. Sodium bicarbonate neutralizes the acidity of chyme
The Correct Answer is D.Sodium bicarbonate is an alkaline solution, which is released by the pancreas. Chyme is acidic coming from the stomach is neutralized by sodium bicarbonate to protect the duodenum.
Question 2:
Punnett squares are used by geneticists to determine the probability of different offspring genotypes. In the one shown below, what letter(s) belong in the lower right box?
A. AA
B. Aa
C. aA
D. aa
The Correct Answer is D.From the given Punnett square, we can cross the genotypes of the two parents and established the phenotypes the offspring will have. The Punnett square is filled as:
|
|
A |
a |
|
a |
Aa |
aa |
|
a |
Aa |
aa |
The requested answer is aa.
Question 3:
The Life Cycle of HIV
Which of the following allows the AIDS virus, which contains RNA, to insert viral DNA into the DNA of a host T-cell after the AIDS virus enters the cell?
A. Receptor proteins located on the surface of the virus
B. The protein that makes up the capsid of the virus
C. Reverse transcriptase, an enzyme encoded by the virus
D. The phospholipids found on the envelope of the virus
The Correct Answer is C.The AIDS virus (HIV virus) is Class VI or Group VI in the Baltimore Classification. Based on the Baltimore Classification, this specifically involves the reverse transcriptase enzyme and it is encoded by the virus.
This is the enzyme that will produce DNA molecules from the viral RNA. This is the mechanism involved where it will use the reverse transcriptase enzyme to insert viral DNA into the genetic material of the host cell.
Question 4:
The process that moves nutrients into the blood or lymph is
A. digestion
B. ingestion
C. elimination
D. absorption
The Correct Answer is D.Digestion is the breakdown of large insoluble food molecules into small water-soluble food molecules so that they can be absorbed into the watery blood plasma.
Ingestion is the process of taking food, drink, or another substance into the body by swallowing or absorbing it.
Elimination refers to the removal of indigestible wastes through the anus, in the form of feaces.
Question 5:
Which of the following are structural features of the trachea?
A. C-shaped cartilage
B. Smooth muscle fibers
C. Cilia
D. All of the above
The Correct Answer is A.Question 6:
Nitrogen gas is an extremely stable molecule because its structure contains which of the following?
A. Resonance bonds
B. Ionic bonds
C. Triple covalent bonds
D. Hydrogen bonds
The Correct Answer is C.The Lewis structure of nitrogen gas is shown below. Triple bonds are stronger than double or single bonds. Therefore, we can infer that the triple bond between the two nitrogen atoms makes nitrogen gas more stable.
Question 7:
Which of Mendel's laws or principles states that gametes carry one allele for each trait?
A. law of segregation
B. independent assortment
C. gene segregation
D. phenotype assortment
The Correct Answer is A.Question 8:
A myocardial infarction affects which of the following blood vessels of the heart?
A. Aorta
B. Vena cava
C. Pulmonary
D. Coronary
The Correct Answer is D.A myocardial infarction refers to heart attack, which result from blockage of blood flowing into the heart.
Blocking is caused by the deposition of fat or cholesterol that forms plaque on the surface of coronary arteries, which supply blood to the heart.
Question 9:
Contraction of the external intercostal muscles causes which of the following to occur?
A. The diaphragm moves downward
B. The rib cage is compressed
C. The thoracic cavity volume decreases
D. The ribs and sternum move upward
The Correct Answer is D.The intercostal muscles are muscles are located along the ribs. The intercostal muscles assist in respiration mechanically. This allows the expansion and contraction of the thorax.
Contraction of the external intercostal muscle causes the ribs and sternum move upward.
Question 10:
Which of the following processes does atmospheric pressure play a role in?
A. Pulmonary Ventilation
B. Photosynthesis
C. Osmosis
D. Evaporation
The Correct Answer is A.Among the choices provided, only one process is directly influenced by atmospheric pressure:
Pulmonary Ventilation (Correct): Pulmonary ventilation, also known as breathing, is driven by pressure differences between the lungs and the atmosphere. Atmospheric pressure plays a pivotal role in this process by facilitating the movement of air into and out of the lungs.
The other options mentioned in the choices—Photosynthesis, Osmosis, and Evaporation—are not primarily influenced by atmospheric pressure. While atmospheric pressure can indirectly affect certain aspects of these processes, it is not a dominant factor in their mechanisms.