Concept explainers
Introduction:
Hormones are chemical messengers secreted by the endocrine glands or neurosecretory cells into the extracellular fluids. The secreted hormones reach the target cells through the bloodstream, and they stimulate response of other tissues or cells. Hormones bind only to specific cells based on their corresponding receptors present on cells. Hormones act through chemical signals. They regulate growth, development, blood pressure,
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Anatomy & Physiology: The Unity of Form and Function
- 1)What tissue regulates both the adenohypophysis and the neurohypophysis? Does this tissue regulate lots of physiological functions? Give a few examples. 2) All of the following are directly controlled by a hormonal stimulus from the hypothalamus EXCEPT… a)GH, Growth hormone b) FSH c) Oxytocin. d) TSH, Thyroid Stimulating Hormone 3) How would a tumor in cells that produce TSH affect levels of TSH in the blood? increase / decrease / normal 4) How would this affect hormone secretion by the target cells of TSH? increase / decrease / normalarrow_forward1) Gross Anatomy and Basic Function of the Endocrine Glands a)Both the endocrine and nervous systems are major regulating systems of the body; however, the nervous system has been compared to a text message, and the endocrine system to mailing a letter. Briefly explain this comparison. b) Chemically, hormones belong chiefly to two molecular groups, the___ and the___ c) If hormones travel in the bloodstream, why don't all tissues respond to all hormones?arrow_forwardHypothyroidism is a condition in which the thyroid gland fails to produce adequate amounts crucial hormones. In the early stages, persons suffering from this condition may be asymptomatic. However, chronic hypothyroidism may show signs of paleness. Please explain the physiological reasons for this symptomatology.arrow_forward
- Identify the gland that secretes prolactin and oxytocin and identify their target tissues.arrow_forward(a) What three phases of the general adaptation syndrome (GAS) constitute the body’s response to stress? (b) What endocrine secretions play dominant roles in each of the first two phases?arrow_forwardName the temporary endocrine gland.arrow_forward
- Describe the development of endocrine glands.arrow_forwardOn a realistic drawing of the endocrine glands in the body (such as a photocopy of Figure 17.1), indicate the gland associated with (a) cretinism, (b) diabetes mellitus, (c) acromegaly, (d) secreting thyroid-stimulating hormone, (e) secreting a hormone that regulates the nightly activities of our circadian rhythms, (f) secreting estrogens, (g) secreting DHEA.arrow_forwardDefine Endocrine gland.arrow_forward
- Recall the role of various endocrine glands.arrow_forwardExplain how the activities of endocrine glands are regulated. 250 word count in own words thank youarrow_forward3. A) What results from hypersecretion of growth hormone before puberty? B) After puberty? C) Explain, in terms of hormonal effects, the reasons behind the two specific signs associated with hypersecretion of growth hormone after puberty.arrow_forward
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