A patient comes in complaining of sensitivity when biting into cold foods. Upon examination, you notice a chisel-shaped tooth appears slightly cracked. What type of tooth is this?
Incisor
Canine
Premolar
Molar
The Correct Answer is A
A. Incisor: These anterior teeth possess a sharp, chisel-shaped incisal edge designed for shearing and cutting food. They have a single root and are the most proximal teeth to the midline. Their morphology matches the clinical description provided.
B. Canine: These teeth are characterized by a single, pointed cusp or "fang" shape intended for tearing and piercing. They are not chisel-shaped and possess the longest roots in the human dentition. They are located lateral to the incisors.
C. Premolar: Also known as bicuspids, these teeth have two prominent cusps on their occlusal surface for crushing and grinding. They do not have a chisel-like edge. They are located between the canines and the molar teeth.
D. Molar: These posterior teeth have large, broad occlusal surfaces with 4 to 5 cusps for heavy mastication. They are designed for grinding boluses into smaller particles. Their flat, multi-cusped morphology is entirely different from a chisel shape.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Ferment:Fermentation of undigested carbohydrates primarily occurs in the large intestine via anaerobic bacteria. The stomach is an acidic environment unsuitable for significant bacterial fermentation. Its primary role is mechanical and initial chemical breakdown.
B. Secrete:Secretion of gastric juice is a function of the mucosal glandular epithelium, not the muscularis externa. While muscle contraction helps mix secretions, the muscles themselves do not produce acid or enzymes. Secretion is an epithelial process.
C. Churn:The stomach possesses an inner oblique muscle layer in addition to circular and longitudinal layers. This allows for complex, multi-directional contractions that physically break down food into chyme. This vigorous mechanical mixing is unique to gastric physiology.
D. Absorb:The stomach has a limited capacity for absorption, primarily taking in lipid-soluble substances like alcohol and aspirin. Absorption is mainly a function of the villi in the small intestine. The muscular layers do not facilitate the absorptive process.
Correct Answer is B
Explanation
A. A person drinks a lot of water quickly:Rapid water ingestion does not typically stimulate excessive salivation beyond what is needed for swallowing. The salivary glands respond more to gustatory and olfactory stimuli than to volume. Hydration status remains the primary regulator here.
B. A person sees delicious food but cannot eat it:Visual and olfactory stimuli activate the parasympathetic nervous system via the salivary nuclei in the medulla. This causes a significant increase in watery, enzyme-rich saliva in anticipation of mastication. This is the classic cephalic response.
C. A person is experiencing dehydration:Dehydration triggers the sympathetic nervous system to reduce salivary secretion to conserve body water. This results in xerostomia, or a dry mouth, rather than overproduction. It is a protective mechanism against fluid loss.
D. A person is giving a public speech:Stress and anxiety associated with public speaking activate the sympathetic "fight or flight" response. This leads to the production of thick, mucus-rich saliva and a dry sensation. It does not cause excessive watery drooling.
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today
Report Wrong Answer on the Current Question
Do you disagree with the answer? If yes, what is your expected answer? Explain.
Kindly be descriptive with the issue you are facing.