Homeostasis

• Cells carry out respiration to release energy from glucose to do this they use enzymes and cells need stable conditions to work
• Enzymes and cells can not work well if conditions around them change too much
• Homeostasis-systems in place to keep internal conditions optimum for cells to function
• Homeostasis- regulation of the internal conditions of a cell or organism to maintain optimum condition for function in response to internal and external changes
• Receptor cells - detect change in environment (stimulus)
• Co- ordination centre - recieves and processes the information from the receptor cells (brain, spinal cord , pancreas)
• Effector - muscle or gland job is to carry out a response
• In reflexes there is no decision making by the conscious part of the brain which make them fast which protects us from danger
• Central nervous system- brain spinal cord and nerves
• endocrine system is a system of glands that secrete hormones into the bloodstream
• Nervous system is very fast but the effects are short lived
• Endocrine system is slow but the effect last longer
• pituitary gland is the master gland of the endocrine system
• Pancreas - releases hormones involved in producing glucose in blood
• Ovaries and testis - release hormones involved in puberty and reproduction
• Thyroid gland involved with growth and metabolism of the body.
• Adrenal gland - releases adrenaline
• Hormones travel in the bloodstream and trigger effects in specific target organs