A pertinent negative would be illustrated by:
A) nausea without vomiting.
B) hypertension and taking medication.
C) dizziness for three days without notifying the doctor.
D) short of breath with history of lung problems.
Question 2
Your patient is a 49-year-old male complaining of a headache and weakness of his left arm, accompanied by nausea and vomiting. The information that would be most helpful in differentiating a brain abscess from a brain tumor is whether or not the patient:
A) has had a seizure.
B) exhibits nuchal rigidity.
C) has had a change in the level of responsiveness.
D) has a recent history of brain surgery.
Dentition, as illustrated in Knight's Sketches in Natural History
Hypertension and Genetics
Negative feedback control of a regulated variable.
Negative feedback loops affecting hypothalamic and anterior pituitary tropic hormones.
Negative feedback control of the female reproductive hormones.
Positive and Negative Reinforcement