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Responding to change (a2 only)
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World war two & the holocaust
2d religious conflict and the church in england, c1529-c1570
1c the tudors: england, 1485-1603
Inter-war germany
The fight for female suffrage
Britain & the wider world: 1745 -1901
Medieval period: 1066 -1509
1f industrialisation and the people: britain, c1783-1885
1l the quest for political stability: germany, 1871-1991
2m wars and welfare: britain in transition, 1906-1957
The cold war
2n revolution and dictatorship: russia, 1917-1953
1d stuart britain and the crisis of monarchy, 1603-1702
World war one
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milly
@mmch07
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Homeostasis is the regulation of internal body conditions. It involves receptors detecting stimuli, coordination centers processing information, and effectors producing responses to maintain optimal conditions. The nervous system and endocrine system work together to maintain homeostasis through various mechanisms.
11/05/2023
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The eye demonstrates important reflexes that contribute to homeostasis. The iris reflex adjusts pupil size in response to light intensity, while ciliary muscles control lens shape for focusing. These mechanisms are examples of how the body maintains optimal conditions.
Example: In bright light, circular muscles in the iris contract to reduce pupil size, while in dim light, radial muscles contract to enlarge the pupil.
Vocabulary: Refraction refers to the bending of light as it passes through the lens, which is crucial for focusing images on the retina.
Homeostasis regulation of body conditions includes temperature control and hormone action. The body responds to heat by producing sweat and dilating blood vessels, while it conserves heat in cold conditions through vasoconstriction and shivering. Hormones from various glands, such as the thyroid and pancreas, play vital roles in maintaining internal balance.
Example: When body temperature rises, sweat glands produce sweat to cool the body through evaporation.
Highlight: Hormones like thyroxine, insulin, and adrenaline are crucial for regulating various bodily functions and maintaining homeostasis.
Glucose homeostasis is a critical aspect of how the body maintains homeostasis. The pancreas regulates blood glucose levels by secreting insulin when glucose is high and glucagon when it's low. Diabetes occurs when this regulation fails, either due to insufficient insulin production (Type 1) or insulin resistance (Type 2).
Definition: Diabetes is a condition characterized by the body's inability to properly regulate blood glucose levels.
Highlight: Type 2 diabetes, often linked to obesity, can potentially be reversed through lifestyle changes.
The kidneys play a crucial role in homeostasis regulation of body conditions by filtering blood and controlling water balance. They selectively reabsorb important substances and eliminate waste products like urea. The pituitary gland regulates water retention through the release of ADH (antidiuretic hormone).
Vocabulary: Selective reabsorption is the process by which the kidneys retain essential substances while eliminating waste.
Example: When the body has excess water, less ADH is released, leading to increased urine production and water excretion.
The menstrual cycle is a complex process regulated by hormones that prepare the body for potential pregnancy. It involves changes in the uterine lining and the release of an egg. Various methods of contraception work by interfering with different stages of this cycle.
Highlight: Hormones like FSH, LH, estrogen, and progesterone play crucial roles in regulating the menstrual cycle.
Example: In vitro fertilization (IVF) is a fertility treatment that involves fertilizing an egg outside the body and then implanting it in the uterus.
Adrenaline and thyroxine are important hormones in homeostasis regulation of body conditions. Adrenaline, produced by the adrenal glands, triggers the "fight or flight" response. Thyroxine, from the thyroid gland, regulates metabolic rate and protein synthesis.
Plant hormones, such as auxins, gibberellins, and ethene, play crucial roles in plant growth and development. They control processes like tropisms, seed dormancy, and fruit ripening.
Vocabulary: Tropism refers to the growth response of plants to external stimuli such as light or gravity.
Example: Auxins are used in horticulture for weed control and promoting root growth in cuttings.
Plant hormones continue to play vital roles in regulating plant growth and development. Gibberellins control seed dormancy and induce flowering, while ethene, a gas produced by aging plant parts, influences cell division and fruit ripening.
Highlight: Understanding plant hormones has important applications in agriculture and horticulture, such as controlling fruit size and ripening.
Example: Ethene is used commercially to ripen fruits after harvesting, ensuring they reach consumers at the optimal stage of ripeness.
Homeostasis regulation of body conditions involves a complex system of receptors, coordination centers, and effectors. The nervous system plays a crucial role in this process, with nerve impulses traveling along neurons and across synapses. The brain, including the cerebral cortex, medulla, and cerebellum, along with the spinal cord, act as key coordination centers.
Definition: Homeostasis is the maintenance of stable internal conditions in the body.
Highlight: The nervous system's components work together to regulate unconscious activities like breathing and muscle coordination.
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the eye
the eye, gcse biology, eye responding to light, types of lenses
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milly
@mmch07
·
2 Followers
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Homeostasis is the regulation of internal body conditions. It involves receptors detecting stimuli, coordination centers processing information, and effectors producing responses to maintain optimal conditions. The nervous system and endocrine system work together to maintain homeostasis through various mechanisms.
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The eye demonstrates important reflexes that contribute to homeostasis. The iris reflex adjusts pupil size in response to light intensity, while ciliary muscles control lens shape for focusing. These mechanisms are examples of how the body maintains optimal conditions.
Example: In bright light, circular muscles in the iris contract to reduce pupil size, while in dim light, radial muscles contract to enlarge the pupil.
Vocabulary: Refraction refers to the bending of light as it passes through the lens, which is crucial for focusing images on the retina.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Homeostasis regulation of body conditions includes temperature control and hormone action. The body responds to heat by producing sweat and dilating blood vessels, while it conserves heat in cold conditions through vasoconstriction and shivering. Hormones from various glands, such as the thyroid and pancreas, play vital roles in maintaining internal balance.
Example: When body temperature rises, sweat glands produce sweat to cool the body through evaporation.
Highlight: Hormones like thyroxine, insulin, and adrenaline are crucial for regulating various bodily functions and maintaining homeostasis.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Glucose homeostasis is a critical aspect of how the body maintains homeostasis. The pancreas regulates blood glucose levels by secreting insulin when glucose is high and glucagon when it's low. Diabetes occurs when this regulation fails, either due to insufficient insulin production (Type 1) or insulin resistance (Type 2).
Definition: Diabetes is a condition characterized by the body's inability to properly regulate blood glucose levels.
Highlight: Type 2 diabetes, often linked to obesity, can potentially be reversed through lifestyle changes.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
The kidneys play a crucial role in homeostasis regulation of body conditions by filtering blood and controlling water balance. They selectively reabsorb important substances and eliminate waste products like urea. The pituitary gland regulates water retention through the release of ADH (antidiuretic hormone).
Vocabulary: Selective reabsorption is the process by which the kidneys retain essential substances while eliminating waste.
Example: When the body has excess water, less ADH is released, leading to increased urine production and water excretion.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
The menstrual cycle is a complex process regulated by hormones that prepare the body for potential pregnancy. It involves changes in the uterine lining and the release of an egg. Various methods of contraception work by interfering with different stages of this cycle.
Highlight: Hormones like FSH, LH, estrogen, and progesterone play crucial roles in regulating the menstrual cycle.
Example: In vitro fertilization (IVF) is a fertility treatment that involves fertilizing an egg outside the body and then implanting it in the uterus.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Adrenaline and thyroxine are important hormones in homeostasis regulation of body conditions. Adrenaline, produced by the adrenal glands, triggers the "fight or flight" response. Thyroxine, from the thyroid gland, regulates metabolic rate and protein synthesis.
Plant hormones, such as auxins, gibberellins, and ethene, play crucial roles in plant growth and development. They control processes like tropisms, seed dormancy, and fruit ripening.
Vocabulary: Tropism refers to the growth response of plants to external stimuli such as light or gravity.
Example: Auxins are used in horticulture for weed control and promoting root growth in cuttings.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Plant hormones continue to play vital roles in regulating plant growth and development. Gibberellins control seed dormancy and induce flowering, while ethene, a gas produced by aging plant parts, influences cell division and fruit ripening.
Highlight: Understanding plant hormones has important applications in agriculture and horticulture, such as controlling fruit size and ripening.
Example: Ethene is used commercially to ripen fruits after harvesting, ensuring they reach consumers at the optimal stage of ripeness.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Homeostasis regulation of body conditions involves a complex system of receptors, coordination centers, and effectors. The nervous system plays a crucial role in this process, with nerve impulses traveling along neurons and across synapses. The brain, including the cerebral cortex, medulla, and cerebellum, along with the spinal cord, act as key coordination centers.
Definition: Homeostasis is the maintenance of stable internal conditions in the body.
Highlight: The nervous system's components work together to regulate unconscious activities like breathing and muscle coordination.
Biology - Biology B5 - Topic
Colorfull Revision Notes with Mindmaps
18
847
0
Biology - Biology paper 2 summary mindmap
This is about main paper 2 topics not all :)
10
178
0
Biology - Biology Unit 3 Summary Notes
includes: B8, B9, B10, B11, B12 for paper 2 AQA GCSE (apologies for typos) Information from official textbook, PMT, savemyexams and school work
423
6544
1
Biology - Biology Paper 2 Flashcards.
Flashcards - Bio
16
647
0
Biology - Homeostasis and the human nervous system paper 2 biology revision
Homeostasis and the human nervous system paper 2 biology revision GCSE grade 8 and 9 content recap
9
743
0
Biology - the eye
the eye, gcse biology, eye responding to light, types of lenses
33
891
1
Average app rating
Pupils love Knowunity
In education app charts in 12 countries
Students have uploaded notes
iOS User
Philip, iOS User
Lena, iOS user
