Chris wears a testosterone patch to increase his testosterone levels. Determine the effects on gonadotropin-releasing hormone (GnRH) and luteinizing hormone (LH)
What will be an ideal response?
When testosterone levels rise to a certain value, gonadotropin-releasing hormone (GnRH) levels fall through a negative feedback loop. In turn, the secretion of luteinizing hormone (LH) and follicle-stimulating hormone (FSH) will also decline.
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Glial cells of the brain are remarkable for their ability to avoid exploding when they are placed in distilled water. This ability comes in part as a consequence of activating ion transport mechanisms that enable them to control cell volume. This activity is an example of
a. self-organization. b. self-regulation. c. self-support (structural) and movement. d. self-replication. e. all of these.
Which of the following best describes the process of cell death in chemical injury?
a. Alteration in cellular membrane b. Decreased cellular oxygen delivery c. Exotoxin toxicity d. Lack of essential vitamin complexes
A soft callus forms during ________.
A. the remodeling of bone B. bone growth at the metaphysis C. intramembranous ossification D. the healing of a fracture E. endochondral ossification