Endocrine Worksheet - PowerPoint by puk10787

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									   Endocrine System
Control of Our Bodies Homeostasis
              Engage
• You will be viewing some video clips from
  Sideshow: Alive On The Inside. Within
  these clips you will see various types of
  endocrine disorders.
• If you are interested in viewing more
  endocrine system oddities, you can read
  the book Freak Show: Presenting Human
  Oddities for Amusement and Profit by
  Robert Bogdan.
              Explore
• Explore 1
• Using your text and other resources, you
  will familiarize yourself with the endocrine
  glands and their functions by completing
  the endocrine system worksheet.
• Explore 2
• Role Play: The Rise and Fall of Glucose
                                      Explain
   Section 39-2

                                         The Endocrine
                                            System

                                              regulates



                                                                                 Calcium
                        Water                                                                  Response
Growth                            Reproduction            Metabolism           and glucose
                       balance                                                                  to stress
                                                                                  levels

by means               by means    by means                by means             by means       by means
  of the                 of the      of the                  of the               of the         of the




           Pituitary                 Testes                Thyroid                  Pancreas     Adrenals




                       Ovaries                                       Parathyroids
            Explain
• List 4 types of endocrine glands and
  give their function.
• What is the overall function of the
  endocrine system?
• With what other systems does the
  endocrine system interact?
  Exocrine or Endocrine
• Exocrine – release products
  (enzymes) into ducts
  – Ex) Sweat, tears, digestive juices
• Endocrine – directly to bloodstream;
  NO DUCTS
  – Ex) Hormones
     Endocrine System
• Glands – release products to
  bloodstream directly.
• Horomones – products deliver
  messages to body
• Target cells – have specific
  receptors for specific hormones
  Endocrine Glands
Section 39-1

               Hypothalamus                            Pineal gland
               The hypothalamus makes                  The pineal gland releases melatonin, which
               hormones that control the               is involved in rhythmic activities, such as
               pituitary gland. In addition, it        daily sleep-wake cycles.
               makes hormones that are stored
               in the pituitary gland.

                                                       Thyroid
               Pituitary gland                         The thyroid produces thyroxine, which
               The pituitary gland produces            regulates metabolism.
               hormones that regulate many of the
               other endocrine glands.
                                                       Pancreas
                                                       The pancreas produces insulin and glucagon, which
               Parathyroid glands                      regulate the level of glucose in the blood.
               These four glands release
               parathyroid hormone, which
               regulate the level of calcium           Ovary
               in the blood.                           The ovaries produce estrogen and progesterone.
                                                       Estrogen is required for the development of secondary
                                                       sex characteristics and for the development of eggs.
               Thymus                                  Progesterone prepares the uterus for a fertilized egg.
               During childhood, the thymus
               releases thymosin, which
               stimulates Tcell development.
                                                                              Testis
                                                                              The testes produce testosterone,
               Adrenal glands                                                 which is responsible for sperm
               The adrenal glands release                                     production and the development of
               epinephrine and nonepinephrine,                                male secondary sex characteristics
               which help the body deal with stress.
             Pituitary Gland
• Master gland
   – Controls the other
     endocrine glands
• Growth Hormone (GH)
   – Too much –
     gigantism
   – Too little – dwarfism
• Antidiuretic (ADH)
   – Stimulates kidneys
     to keep water
      Hypothalamus
• Part of brain and attached to
  pituitary
• Controls pituitary secretions
Thyroid
    THYROID GLAND
• Regulates
  – Metabolism and energy balance
     Thyroid Hormones
• Thyroxine
  – Regulates body energy usage
• Calcitonin
  – One hormones that regulates calcium
    and phosphate in blood
          Questions
• What are the two hormones that the
  thyroid secretes?
• What is the function of thyroxine?
• What is the function of calcitonin?
Parathyroid
     Calcium Regulation
    PARAthyroid Glands
• PTH-Parathyroid hormones
• Increases calcium, phosphate, and
  magnesium absorption in intestines.
• Causes bones to release calcium and
  phosphate
• Causes removal of calcium and magnesium
  from urine by kidneys
• Increases the making of Vitamin D in body
    Negative Feedback
       Mechanism
• Our body uses feedback mechanism
  to maintain homeostasis within our
  body.
• Regulation of calcium is one example
  of this process.
• Can you think of another one? Hint:
  Role Play Activity
          Questions
• PTH cause the small intestine to
  absorb more calcium, _____ and
  _____.
• What does PTH cause the bones to
  release?
• What do the kidneys do because of
  PTH?
        Adrenal Gland
• Releases hormones to deal with stress
    Adrenal Gland Cont.
• Cortex
  – Produces more than
    2 dozen steroid
    hormones
  – corticosteriods
• Medulla
  – “fight or flight”
  – Epinephrine and
    norepinephrine
    Glucose Regulation
Two Ways:
1. Eating Regularly
2. Hormone Adjustments
            Pancreas:
      Endocrine and Exocrine
• What did the pancreas do in digestion?
          Secreted Enzymes
Pancreas also secretes hormones
Endocrine glands
  - ductless organ that releases hormones
  DIRECTLY into the bloodstream.
          Questions
• What do exocrine glands secrete?
• What do endocrine glands secrete?
      Blood Glucose Level
• Pancreatic Hormones regulate blood
  sugar level before and after meals.
• Islets; clusters of cells in pancreas
  – Alphasecrete glucagon – increases sugar
  – Beta secrete insulin – decreases sugar
        What Happens?

• Between meals
  Blood glucose lowPancreas secretes
  glucagonLiver changes glycogen to
  glucoseglucose sent to target tissues

• After a meal
   Blood glucose highPancreas secretes
  insulinGlucose goes to the Liver(Glygogen) and
  goes to Target tissues
             Questions
• What organ regulates glucose in blood?
• When we eat our blood glucose level is high
  or low?
• In between meals our blood glucose level is
  high or low?
• When our blood glucose is high the
  pancreas secretes ___________.
• When our blood glucose is low the
  pancreas secretes ___________.
• What mechanism allows our body to
  control the glucose level in our body?
             Diabetes
• Diabetes
  – High sugar levels in blood
  – Do not produce enough insulin to control
    blood sugar
  – Some take insulin injections to regulate
     Reproductive Glands
•   Production of gametes
•   Secretion of sex hormones
•   Female – Ovaries - Estrogen
•   Males – Testes - Testosterone
          Elaborate
• You will perform various
  investigations with plant hormones to
  better understand human hormones.
  You will be working with hormones
  that stimulate and inhibit plant
  growth.

								
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