18 Questions
What is the effect of GROUP 3 on the chief cells?
Suppresses the activity of the chief cells
What is the primary mechanism of hormone regulation?
Negative feedback
What is the role of the hypothalamus in hormone regulation?
Secretes releasing hormones
What triggers the release of more hormones in negative feedback?
Low hormone levels in the blood or a stimulus
What is an example of hormone regulation by positive feedback?
Production of oxytocin during labor and childbirth
What are the three mechanisms by which endocrine glands are stimulated to synthesize and release hormones?
Humoral, hormonal, and neural stimuli
What primarily regulates the secretion of insulin by the B cells?
The level of glucose in the blood
What is the function of glucagon secreted by the A cells?
To increase blood sugar levels
What is produced and secreted by the D cells?
Somatostatin
What is the function of somatostatin?
To regulate the secretion of other hormones
What is the function of the islets of Langerhans?
To regulate glucose metabolism
What is the shape of the cells of the islets of Langerhans?
Polygonal
Which type of hormones are produced by endocrine glands excluding the gonads and adrenal cortex?
Amino acid hormones
What is the primary mechanism controlling hormone production?
Negative feedback mechanism
Why are endocrine glands referred to as 'ductless glands'?
Because they secrete hormones directly into the bloodstream
What determines the target tissue for a specific hormone?
The presence of specific receptors on cells
What is the function of the posterior pituitary?
To store and release hormones produced by the hypothalamus
What is the name of the part of the pituitary gland that is glandular tissue?
Anterior pituitary
Assess your knowledge of the thyroid gland, its hormones, and their functions in regulating metabolism, growth, and development. Learn about thyroxine, triiodothyronine, and calcitonin.
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