Endocrine system

• What systems work together to control vital functions in the body?

  The endocrine and nervous systems
• How does the speed of the endocrine system compare to the nervous system?

  The endocrine system acts more slowly
• What is the role of glands in the endocrine system?

  They produce hormones
• How do hormones affect cells in the body?

  They affect any cell with a receptor
• What hormone does the thyroid gland produce?

  Thyroxine
• What is a consequence of hormones affecting multiple organs?

  They lead to diverse and powerful responses
• What effect does thyroxine have on the heart?

  It increases heart rate
• How does thyroxine affect metabolic rates?

  It increases metabolic rates
• What is the main gland of the endocrine system?

  The pituitary gland
• Why is the pituitary gland called the 'master gland'?

  It controls hormone release from other glands
• How do the endocrine system and ANS work together during stress?

  They activate the fight or flight response
• What part of the brain activates the pituitary gland during stress?

  The hypothalamus
• What happens to the ANS during a stressful event?

  It shifts from parasympathetic to sympathetic
• What hormone is released from the adrenal medulla?

  Adrenaline
• What physiological changes does adrenaline trigger?

  Increased heart rate and arousal
• What type of response is triggered when a threat is detected?

  An acute and automatic response
• What feeling is often associated with stress or panic?

  'Butterflies' in your stomach
• What does the parasympathetic nervous system do after a threat passes?

  It returns the body to resting state
• How does the parasympathetic system act in relation to the sympathetic system?

  It works antagonistically to the sympathetic system
• What is the parasympathetic system sometimes referred to as?

  The rest and digest response