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Homeostasis and Chemical Response
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- 1Homeostasis and Responses - B5Homeostasis and Responses - B5
- 2HomeostasisMaintaining a Stable Internal Environment
- 3The Nervous SystemDetects and Reacts to Stimuli
- 4The Nervous System is made up of Different Parts1) Central Nervous System (CNS) :
- In vertebrates this consists of the brain and spinal cord only. In mammals, the CNS is connected to the body by the sensory neurones and motor neurones.
2) Sensory Neurones :
- The neurones that carry information as electrical impulses from the receptors to the CNS
3) Motor Neurones :
- The neurones that carry electrical impulses from the CNS to the effectors
Effectors :
- All your muscles and glands, which respond to nervous impulses - 5ReceptorsReceptors are the cells that detect stimuli.
There are different types of receptors like taste receptors on the tongue and sound receptors in the ear - 6SynapesThe connection between two neurones
- 7ReflexesHelp prevents injury by rapid, automatic response
- 8HormonesChemical Messengers sent in the Blood
- 9The Pituitary Gland - The Endocrine System- Produces many hormones that regulates the bodies conditions
- AKA the 'master gland' - 10Thyroid - The Endocrine System- Produces thyroxine which helps regulate things like the rate of metabolism, heart rate and temperature
- 11Adrenal Gland - The Endocrine System- Produces adrenaline which is used to prepare the body for a 'fight or flight' response
- 12The Pancreas - The Endocrine System- Produces insulin, which is used to regulate the blood glucose level
- 13Ovaries - Females only - The Endocrine System- Produces oestrogen, which is involved in the menstrual cycle
- 14Testes - Males Only - The Endocrine System- Produces Testosterone, which controls puberty and sperm production
- 15Nerves- Very FAST action
- Acts for a very SHORT TIME
- Acts on a very PRECISE ARE - 16Hormones- SLOWER action
- Acts for a LONG TIME
- Acts in a more GENERAL way - 17Controlling Blood Sugar- When the blood glucose level is too high then insulin is added
- When the blood glucose level is too low then glucagon is added - 18The Menstrual Cycle has 4 stagesStage 1: The uterus lining breaks down for about 4 days
Stage 2: Lining of the uterus breaks up
Stage 3: An egg is developed and released
Stage 4: Lining of the uterus is maintained - 194 Hormones that control the Menstrual CycleFSH:
- Produced in the pituitary glands
- Causes and egg to mature
Oestrogen:
- Produced in the ovaries
- Causes the lining of the uterus to grow
- Stimulates the release of LH and inhabits release of FSH
LH:
- Produced by the pituitary glands
- Stimulates the release of an egg on day 14
Progesterone:
- Produced in the ovaries
- Maintains the lining of the uterus during the second half of the cycle
- Inhabits the release of LH and FSH
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- El usuario ha eliminado su información de asignaturas Fichas sobre Homeostasis and Chemical Response, creado por Usuario eliminado el 08/04/2019.
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- Creado por Saif Hussain · 27 may 2018
- Copiado por bill fingleton · 8 abr 2019
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