Chapter 11 endocrine system
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Chapter 11 : Endocrine System. Endocrine System: What is it?. system of glands , each of which secretes a type of hormone directly into the bloodstream to regulate the body Hormones affect other endocrine glands or body systems. ES and Homeostasis. Homeostasis. STIMULUS. Hypothalamus

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Chapter 11 : Endocrine System

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Chapter 11 endocrine system

Chapter 11 : Endocrine System


Endocrine system what is it

Endocrine System: What is it?

  • system of glands, each of which secretes a type of hormone directly into the bloodstream to regulate the body

  • Hormones affect other endocrine glands or body systems


Es and homeostasis

ES and Homeostasis

  • Homeostasis


Chapter 11 endocrine system

STIMULUS

Hypothalamus

Releasing Hormone

(Release-Inhibiting Hormone)

Pituitary

Stimulating Hormone

Gland

Hormone

Target


Basic structure of feedback loop

Basic Structure of Feedback Loop

  • Environmental Stimulus

  • Stimulates Control Center (Brain-hypothal.)

  • Hypothalamic hormones stim. Pituitary

  • Pituitary hormone stim. Target area

  • Target area produces change

  • Change acts negatively or positively on the cycle.


A positive feedback

A. Positive Feedback

  • Not common

  • Classic example:

    Action of OXYTOCIN on uterine muscle during birth.


Positive feedback

Positive Feedback

  • Baby pushes on cervix

  • Nervous signal to Hypothalamus

  • Hypothal. manufactures OXY

  • OXY transported to POSTERIOR PITUITARY & released

  • OXY stimulates uterine contraction

  • Loop stops when baby leaves birth canal


Negative feedback thyroid

Negative Feedback: Thyroid


Iv specific endocrine events

IV. Specific Endocrine Events

  • Thyroid Hormone

  • Growth Hormone

  • Adrenal Cortex Hormones

  • Sex Steroids


Endocrine system team players

Endocrine System: Team Players

  • The Pituitary Gland

  • Thyroid Gland

  • Parathyroid Glands

  • Adrenal Glands

  • Pancreas

  • Thymus

  • Pineal Gland

  • Gonads


Pituitary hypophysis

Anterior Secretions:

TSH

ACTH

FSH

LH

ISCH

LTH

GH/ STH

MSH

Pituitary gland: a small gland located on a stalk hanging from the base of the brain

“The Master Gland”

Primary function is to control other glands.

Produces many hormones.

Secretion is controlled by the hypothalamus in the base of the brain.

Pituitary/ Hypophysis

  • Posterior Secretions:

    • ADH

    • Oxytocin


Thyroid gland

Secretions:

T3: metabolism regulation

T4: metabolism regulation

Calcitonin: promotes absorption of calcium from blood and bones

Thyroid Gland: butterfly shaped, left and right halves fused by an isthumus. On either side of the larynx

“The Weight Gland”

Controls metabolism, iodine uptake, blood calcium levels

Thyroid Gland


Adrenal glands

Cortex Secretions (Steriods):

Mineralocorticoids

Glucocorticoids

Androgens

Adrenal Glands: Located cranial to the kidney. Each gland has 2 parts: cortex and medulla

“The Reaction Gland”

Regulates electrolytes, metabolism, sexual functions, injury response

Adrenal Glands

  • Medulla Secretions:

    • Epinephrine

    • Noreeprinep-hrine


Pancreas

Endocrine Secretions:

Insulin

Glucagon

Pancreas: aggregation of cells located near the proximal duodenum

“The Sugar Regulation Gland”

(Endocrine FXN) secretion of blood-glucose regulation

Pancreas


Gonads gamete production

Testes

Testosterone

2ndary sex characteristics

Ovary Secretions: Stimulated by hCG which is secreted by placenta

Estrogen

2ndary sex characteristics

Progesterone

Maintains preg

Gonads: gamete production


Common procedures

Common Procedures

  • Assays: tests amount of hormone present

  • Thyroid Stimulation Test: blood analysis of thyroid levels

  • ACTH Stimulation Test: blood analysis of cortisol levels in the blood


Common ailments

Common Ailments

  • Acromegaly: enlargement of extremities due to over active growth

  • Cushing’s Disease/ Hyperandrenocorticism: excessive adrenal cortex production resulting in increased urination, drinking, and distribution of body fat

  • Diabetes Mellitus: metabolic disorder, of inadequate secretion of insulin


Activities

Activities

  • For Each Endocrine player

    • List the secretions and what each secretion performs in the body

  • Define an Endocrine Disease include

    • Symptoms, Prevention, Treatment, and Definition

  • Outline a Positive and Negative Feedback reaction in the body (can use the pregnancy example, but not the Thyroid example)

    • Design a Flow chart for the reactions you described


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