82949

Alginate is derived from alginic acid, which is extracted from brown seaweed. It reacts with calcium sulfate to form a stable gel.

69031

The cementum near the cementoenamel junction (CEJ) is indeed very thin, making it more susceptible to removal during instrumentation. Additionally, cementum can be softer than subgingival calculus, and in cases of periodontal disease, it may become necrotic. 

0

Dentinal fluid is the basis of the hydrodynamic theory of sensitivity. Fluid movement in tubules stimulates mechanoreceptors near the pulp. Normally, there is an outward flow.

32788

Le Fort I Fracture

0

Correct answer: 1) Thick, poorly cleared mucus in CF airways predisposes to chronic colonization, with Pseudomonas aeruginosa (particularly mucoid strains) being the dominant pathogen in older children/adults, alongside Staphylococcus aureus (common in early childhood) and Burkholderia cepacia (associated with rapid decline).

23967

Cheyne-Strokes breathing may occur in severe heart failure, normal persons during sleep at high altitude, and elder people

40259

The mandible experiences a more pronounced adolescent growth spurt compared to the maxilla.
The growth pattern of the mandible closely mirrors the general somatic growth curve, which includes the adolescent growth spurt, unlike the maxilla which follows a neural growth pattern more closely.

17024

Long-acting beta-agonists (LABAs) can contribute to symptoms of increasing shortness of breath in patients with COPD.

92432

Glycophorin C is not associated with hereditary spherocytosis; it is a sialoglycoprotein found in the red blood cell membrane, while ankyrin, palladin, and anion transport protein are involved in the structural integrity of the membrane.

24206

In an X-ray tube, the filament (cathode) is heated to produce electrons through a process called thermionic emission. This heating is accomplished by a step-down low voltage transformer, which reduces the high voltage from the power supply to a lower voltage suitable for heating the filament. The step-down transformer ensures that the filament receives the correct amount of current to achieve the necessary temperature for electron production.