The Endocrine System

Endocrine glands
1. secrete and control hormones
  1. regulated by feedback
2. major glands include pituitary, adrenal glands, and ovaries and testies
Hormones
1. hypothalamus - releasing hormone
  1. pituitary gland - secreting hormone
    1. target gland- specific hormone
      1. Specific hormone level rises - releasing hormone decreses
        Stable hormone levels reached
Pituitary gland
1. controlled by the hypothalamus
2. 'master gland' stimulates other glands into releasing hormones
  1. regulated by negative feedback
    1. prevents hormone levels getting too high
3. Anterior and posterior
  1. posterior
    1. oxytocin - childbirth and mother-infant bonding,
  2. anterior
    1. ACTH - stimulates cortisol production in response to stress
    2. Luteinising hormone and follicle stimulating hormone
      1. females: ovaries produce oestrogen and progesterone
      2. Males: testies produce testosterone and sperm
Adrenal glands
1. located near kidneys
  1. Outer part: adrenal cortex
    1. necessary for life
    2. Cortisol
      1. regulates cardiovascular and anti-inflamitory responses
      2. low levels lead to low blood pressure, poor immune response, inability to cope with stress
    3. Aldosterone
      1. regulates blood pressure and volume
  2. inner part: adrenal medulla
    1. not
    2. fight or flight: adrenaline and noradrenaline
      1. adrenaline: increase heart rate and blood flow, aid fat conversion into glucose
      2. noradrenaline: constricts blood vessels to increase blood pressure

Media attachments

Hormone Target Cells (binary/octet-stream)

Next up

The Endocrine System

Description

Resource summary

Media attachments

Similar

	Created by Harriet Bruce over 7 years ago