A nurse is aware of the vital role that hormones and the negative feedback mechanism play in the maintenance of homeostasis. Which of the following statements best describes the negative feedback mechanism that controls insulin secretion?
A) Insulin is synthesized and released in an inversely proportionate quantity to glucagon.
B) Serum levels of insulin are constantly secreted unless such secretion is actively inhibited.
C) High concentrations of insulin in the blood inhibit further insulin secretion.
D) Serum levels of insulin are maintained at the lowest possible level.
Question 2
A nurse on a neurological unit is participating in the care of a female patient who is receiving treatment for a spinal cord injury (SCI) that she experienced 2 weeks ago.
The patient's care plan specifies measures to prevent skin breakdown, and the nurse has planned several changes of position during the shift. How should the nurse best reposition this patient?
A) Maintain a consistent position unless impending signs of skin breakdown are evident.
B) Reposition the patient beginning with the upper extremities.
C) Reposition the patient beginning with the lower extremities.
D) Log roll the patient.
The amyloid-β peptide, which plays a major role in Alzheimer’s disease
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Blood Clotting Mechanism
A positive feedback loop.
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Illustration of the mechanism of riboswitch regulation of gene expression