Suckling by an infant triggers a positive-feedback mechanism that maintains lactation by stimulating the ________.
A. posterior lobe of the pituitary to secrete oxytocin
B. contraction of the milk ducts
C. anterior lobe of the pituitary to secrete prolactin
D. hypothalamus to secrete prolactin-releasing hormone
Answer: A
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For normal sperm development, the testes must be kept about
A) the same temperature as the brain. B) 1.1°C cooler than core body temperature. C) 1.1°C warmer than core body temperature. D) 4.8°C cooler than core body temperature. E) 4.8°C warmer than core body temperature.
Which glial cells possess phagocytic abilities?
a. astrocytes b. ependymal cells c. neurons d. microglia e. oligodendrocytes
The majority of hormones fall into the class of ____________________ hormones
Fill in the blank(s) with correct word
Which of these correctly describes the chloride shift?
A. In the tissues, chloride enters red blood cells in exchange for CO2. B. In the tissues, chloride enters red blood cells in exchange for bicarbonate ions. C. In the tissues, chloride exits red blood cells in exchange for carbonic acid. D. In the lungs, chloride enters red blood cells in exchange for CO2. E. In the lungs, chloride enters red blood cells in exchange for bicarbonate ions.