DAANCE Anatomy and Physiology 5

Question 1

Which physiological reflex is most responsible for laryngospasm when a foreign substance contacts the laryngeal inlet?

Accepted Answer

Laryngeal adductor reflex

Answer

The laryngeal adductor reflex causes rapid, forceful closure of the vocal cords in response to laryngeal stimulation, protecting the lower airway.

Question 2

Which foramen in the mandible is the primary landmark for mandibular nerve block administration?

Accepted Answer

Mandibular foramen

Answer

The mandibular foramen on the medial surface of the ramus is where the inferior alveolar nerve enters the mandibular canal, making it the target for IANB.

Question 3

Which cardiac valve prevents backflow of blood from the aorta into the left ventricle?

Accepted Answer

Aortic semilunar valve

Answer

The aortic semilunar valve closes during ventricular diastole to prevent regurgitation of blood from the aorta back into the left ventricle.

Question 4

The phrenic nerve, which innervates the diaphragm, originates primarily from which cervical nerve roots?

Accepted Answer

C3-C5

Answer

The phrenic nerve arises from cervical roots C3, C4, and C5, remembered by the mnemonic 'C3, 4, 5 keeps the diaphragm alive.'

Question 5

In the context of dental anesthesia, what is the clinical significance of the pterygomandibular space?

Accepted Answer

It houses the inferior alveolar and lingual nerves targeted in IANB

Answer

The pterygomandibular space contains the inferior alveolar and lingual nerves, making it the target region for inferior alveolar nerve block injections.

DAANCE - Dental Anesthesia Assistant National Certification Examination Practice Test

DAANCE - Dental Anesthesia Assistant National Certification Examination Practice Test

DAANCE Anatomy and Physiology 5