Exam 5: Hormones and the Brain
Growth hormone secretion can be prompted by the release of the hormone _______ from the stomach.
ghrelin
Describe, in general terms, the ways in which negative feedback controls hormone levels using hypothetical hypothalamic-pituitary-target cell hormones X,Y, and Z, respectively.
Negative feedback is a regulatory mechanism that helps maintain hormone levels within a certain range in the body. In the hypothetical scenario involving hormones X, Y, and Z, negative feedback would work as follows:
1. Hormone X is released from the hypothalamus and stimulates the pituitary gland to release hormone Y.
2. Hormone Y then acts on its target cells to stimulate the release of hormone Z.
3. Once hormone Z reaches a certain level in the bloodstream, it signals back to the hypothalamus and pituitary gland to decrease the release of hormones X and Y.
4. This decrease in hormone X and Y production then leads to a decrease in hormone Z production, thus maintaining hormone levels within a specific range.
In this way, negative feedback helps to prevent hormone levels from becoming too high or too low, ensuring that the body's physiological processes remain balanced.
A hormone that is normally found only in females is
D
The _______ is a clear example of _______ found in the _______.
Describe the two divisions of the adrenal glands, noting whether each utilizes predominantly neural vs endocrine communication as well as major secretions and output control mechanisms.
Summarize the three major classifications of hormones. Discuss their differences and similarities with respect to their physiological actions on nerve cells. Include the identification of endocrine signals by target tissues to the cellular actions mediated by these signals and their general influences on transcription.
One of the developmental consequences of a diet that is insufficient in iodine is
Among ovarian hormones, _______ promote(s) development of reproductive organs and secondary sex characteristics and _______ prepare(s) the endometrium to house and nourish a fertilized egg.
_______ hormones affect the secretion of other endocrine glands.
Describe generally the difference between genomic and nongenomic steroid hormone effects.
A male ringdove that is castrated in adulthood would have trouble with
Male mice with the oxytocin gene knocked out can be cured of _______ with brain infusions of ______.
The endocrine and nervous systems interact to produce integrated behavior. Both the milk-letdown reflex and the courtship behavior of ringdoves are good examples of behaviors that illustrate these hormone‒neural interactions. For both the reflex and the behavior, describe the neural‒neural transmission, neural‒endocrine transmission, and endocrine‒endocrine transmission that occur and the anatomical components involved.
If a hormone-secreting cell is affected by the hormone that it synthesizes, the hormone is said to act in a(n) _______ fashion.
Men rooting for a sports team will produce more _______ if their team wins.
______ hormones control ______ hormones which control _____.
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