1: Family members or significant others that reports and respond to interviews.
2: Members of the health care team.
3: Medical record information
4: The patient, through interview, observations, and physical examination
& 5: Scientific literature.
When you swallow, a flap called the epiglottis moves to block the entrance of food particles into your larynx and lungs. The muscles of the larynx pull upward to assist with this movement. They also tightly close during swallowing. That prevents food from entering your lungs.
I would say that she didn't correct her wrong answers after the first test, therefore making her confused on the second.