Adrenaline and Thyroxine

• What are the two hormones mentioned in the study material?

  Adrenaline and thyroxine
• What is the primary function of adrenaline?

  Prepares the body for "fight or flight"
• Where is adrenaline released from?

  Adrenal glands
• In response to what situations is adrenaline released?

  Stressful or scary situations
• How does the brain trigger the release of adrenaline?

  By detecting fear or stress
• What effect does adrenaline have on the body?

  Increases heart rate and oxygen supply
• What is the role of thyroxine?

  Regulates metabolism
• Where is thyroxine released from?

  Thyroid gland
• How does thyroxine affect the body's metabolic rate?

  It increases the basal metabolic rate
• What is a consequence of increased thyroxine levels?

  Stimulates protein synthesis for growth
• What feedback mechanism controls hormone levels in the body?

  Negative feedback
• How does negative feedback work in hormone regulation?

  It maintains hormone levels within normal range
• What happens when hormone levels go above or below normal?

  Triggers responses to restore normal levels
• What is the role of thyroxine in regulating the basal metabolic rate?

  It determines the speed of chemical reactions
• What is the relationship between adrenaline and glucose levels during stress?

  Adrenaline increases glucose availability
• How does adrenaline affect oxygen supply to cells?

  Increases oxygen supply to cells
• What is the significance of adrenaline in emergency situations?

  Prepares the body for immediate action
• What is the primary effect of thyroxine on growth?

  Stimulates growth and development
• How does the body respond to low hormone levels?

  Triggers mechanisms to restore normal levels
• What role does thyroxine play in energy metabolism?

  It regulates energy production in cells
• What is the effect of adrenaline on heart rate?

  Increases heart rate
• What is the location of the thyroid gland?

  In the neck
• What is the relationship between adrenaline and stress response?

  Adrenaline is released during stress response
• How do adrenaline and thyroxine work together in the body?

  They regulate stress and metabolic functions
• What is the role of thyroxine in the body?

  Regulates the basal metabolic rate
• Why is thyroxine important for processes in the body?

  It stimulates protein synthesis for growth
• What hormone stimulates the release of thyroxine?

  Thyroid-stimulating hormone (TSH)
• Where is thyroxine released from in the body?

  From the pituitary gland
• How does a negative feedback system regulate thyroxine levels in the blood?

  It decreases TSH secretion when levels are high
• What happens when thyroxine levels in the blood are higher than normal?

  TSH secretion from the pituitary gland is inhibited
• What is the effect of negative feedback on thyroxine release?

  It reduces thyroxine release when levels are high
• How does the body respond if thyroxine levels fall below normal?

  TSH secretion increases to stimulate thyroxine
• What are the consequences of high thyroxine levels in the blood?

  • Inhibition of TSH secretion
  • Reduced thyroxine release
  • Potential for metabolic imbalances
• What is the feedback mechanism for regulating thyroxine levels?

  • Negative feedback system
  • High thyroxine inhibits TSH release
  • Low thyroxine stimulates TSH release
• What is the primary function of negative feedback in hormone regulation?

  To maintain homeostasis in hormone levels
• How does temperature affect the action of negative feedback in thyroxine regulation?

  Low temperature increases thyroxine release
• What happens to heating when the temperature gets too low in relation to thyroxine?

  Heating is turned on to raise body temperature
• What occurs when the temperature gets too high in relation to thyroxine?

  Heating is turned off to lower body temperature
• What is the relationship between thyroxine and metabolic rate?

  • Thyroxine regulates metabolic rate
  • Higher thyroxine increases metabolic activity
  • Lower thyroxine decreases metabolic activity
• What gland releases thyroid-stimulating hormone?

  • Pituitary gland