ADSC 4300 Lecture Notes - Lecture 16: Adrenal Gland, Thymus, Adrenal Medulla
30 Mar 2018
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Document Summary
Pituitary gland: anterior pituitary contains gland tissue. These cells synthesize hormones and secrete hormones: posterior pituitary gland contains nervous tissue. Arises from brain tissue: these tissues secrete & store hormones, hormones: vasopressin & oxytocin. Thyroid gland- located in neck: behind thyroid gland there are multiple, very small parathyroid glands. Adrenal gland- above kidneys, small glands, yet very important for body: comprised of 2 parts: adrenal cortex (can be divided into 3 zones) & adrenal medulla (middle part, the different zones of cells secrete different hormones. Pancreas: both external exocrine & endocrine glands, secrete alpha and beta cells. Hormones are chemical messengers that have biological effects. Chemical classification of hormones: proteins, peptides, glycoproteins, modified aa, steroids, fa derivatives. Types of hormone actions: paracrine- act on neighboring cells, autocrine- act on themselves, neuroendocrine, endocrine. Hormone receptor locations: cell membrane: typically binds protein hormones, nuclear membrane: typically binds steroid and thyroid hormones, cytosol: possibly binds steroid and protein hormones.
