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doc Lecture 5-8
doc Lecture 5-8

... Synthesised from cholesterol in the smooth endoplasmic reticulum of the gonads and adrenal cortex. Cells take up cholesterol from the blood and convert it to pregnenolone in the mitochondria. Pregnenolone is converted into progesterone which acts a s a hormone and can be used as a prohormone for fur ...
Endocrine System
Endocrine System

... Other Endocrine Tissues and Their Secretions • Pineal gland: Melatonin – What is the significance of its location near the thalamus? – Why is it significant that this gland is innervated by sympathetic nerves? ...
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Lesson 12
Lesson 12

... Biosynthesis. The corticosteroids are synthesized from cholesterol within the adrenal cortex. Most steroidogenic reactions are catalysed by enzymes of the cytochrome P450 family. They are located within the mitochondria and require adrenodoxin as a cofactor (except 21hydroxylase and 17α-hydroxylase) ...
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... 1. Signaling molecules are hormones and secretions that can bind to target cells and elicit in them a response; this integrates the vertebrate body's functions. 2. There are four main types of signaling molecules: a. Hormones are secreted from endocrine sources and some neurons and are then transpor ...
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Name - G9Biology

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Endocrine System Wrap-up

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Chapter 17 The Endocrine System and Development Endocrine

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A. Androgens and antiandrogens

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AP Biology Reading/Study Guide (aka Important Things to Know

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ACUTE RENAL FAILURE - Welcome to Hansen Nursing

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ap biology ch - Birdville ISD

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Bio217: Pathophysiology Class Notes Professor Linda Falkow

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AIM: What system of the human body regulates hormones?

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Endocrine System
Endocrine System

... The Effects of Calcitonin  Secreted from thyroid parafollicular (C) cells when blood calcium levels are high  Calcitonin lowers Ca++ by slowing the calcium-releasing activity of osteoclasts in bone and increasing calcium secretion by the kidney ...
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Hyperandrogenism

Hyperandrogenism, or androgen excess, is a medical condition characterized by excessive levels of androgens in the body and the associated effects of these excessive levels of androgens.Hyperandrogenism is one of the primary symptoms of polycystic ovary syndrome (PCOS). In such cases, it presents with symptoms such as acne and seborrhea, is frequent in adolescent girls and is often associated with irregular menstrual cycles. In most instances, these symptoms are transient and reflect only the immaturity of the hypothalamic-pituitary-ovarian axis during the first years following menarche. Approximately three-quarters of patients with PCOS (by the diagnostic criteria of NIH/NICHD 1990) have evidence of hyperandrogenism, with free testosterone being the single most predictive marker with ~60% of patients demonstrating supranormal levels.Hyperandrogenism can also be the result of excessive production of adrenal or gonadal androgens by adrenal adenomas, carcinomas, or hyperplasia, Leydig cell tumors in men, and arrhenoblastomas in women.In women, signs and symptoms of hyperandrogenism frequently include acne, scalp hair loss (androgenic alopecia), excessive facial and body hair (hirsutism), atypically high libido, breast atrophy, and others. Collectively, these symptoms are described as virilization.Management of hyperandrogenism symptoms like androgenic alopecia, include the use of antiandrogens such as cyproterone acetate, spironolactone, and flutamide.
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