Co-ordination And Response
Bayani Gaba-gaba
Your body is constantly responding to changes both inside and outside it. When you step on something sharp, your foot lifts before you even feel pain. When your blood sugar rises after a meal, hormones bring it back down. Even a plant bending toward a window is co-ordinating a response. All of these examples depend on detecting a stimulus and producing an appropriate response.
In this lesson you will explore how the nervous and hormonal systems work, how the eye and reflex arcs function, how plants respond to light and gravity, and how the body maintains a stable internal environment through homeostasis. This is one of the broadest topics in the Edexcel specification and appears regularly on both papers.
Manufura
- Understand how organisms are able to respond to changes in their environment
- Understand that homeostasis is the maintenance of a constant internal environment, and that body water content and body temperature are both examples of homeostasis
- Understand that a co-ordinated response requires a stimulus, a receptor and an effector
- Understand that plants respond to stimuli
- Describe the geotropic and phototropic responses of roots and stems
- Understand the role of auxin in the phototropic response of stems
- Describe how nervous and hormonal communication control responses and understand the differences between the two systems
- Understand that the central nervous system consists of the brain and spinal cord and is linked to sense organs by nerves
- Understand that stimulation of receptors in the sense organs sends electrical impulses along nerves into and out of the central nervous system, resulting in rapid responses
- Understand the role of neurotransmitters at synapses
- Describe the structure and functioning of a simple reflex arc illustrated by the withdrawal of a finger from a hot object
- Describe the structure and function of the eye as a receptor
- Understand the function of the eye in focusing on near and distant objects, and in responding to changes in light intensity
- Describe the role of the skin in temperature regulation, with reference to sweating, vasoconstriction and vasodilation
- Understand the sources, roles and effects of the following hormones: adrenaline, insulin, testosterone, progesterone and oestrogen
- Understand the sources, roles and effects of the following hormones: ADH, FSH and LH
Taswirar tunani
An zana wannan batu don ka ga yadda ra'ayoyi ke hadewa.
Bude taswirar tunani a cikin manhaja
Katunan tunawa
Gwaji mai sauri kan abin da ake jarraba a wannan batu.
Yi atisayen wadannan katuna a cikin manhaja
Takardar Darasi
Cikakken Bayanin Darasi Yana Kan Manhajar Green Bridge
Sami manhajar Green Bridge CBT a wayarka ko kwamfutarka domin cikakken laburaren IGCSE: takardun jarrabawar baya, tsarin kimantawa, taswirar tunani, katunan karatu da darussan sauti.
Nazarin Darasi
Barka da kammala darasi akan Co-ordination And Response. Yanzu da kuka bincika mahimman raayoyi da raayoyi, lokaci yayi da zaku gwada ilimin ku. Wannan sashe yana ba da ayyuka iri-iri Tambayoyin da aka tsara don ƙarfafa fahimtar ku da kuma taimaka muku auna fahimtar ku game da kayan.
Za ka gamu da haɗe-haɗen nau'ikan tambayoyi, ciki har da tambayoyin zaɓi da yawa, tambayoyin gajeren amsa, da tambayoyin rubutu. Kowace tambaya an ƙirƙira ta da kyau don auna fannoni daban-daban na iliminka da ƙwarewar tunani mai zurfi.
Yi wannan ɓangaren na kimantawa a matsayin wata dama don ƙarfafa fahimtarka kan batun kuma don gano duk wani yanki da kake buƙatar ƙarin karatu. Kada ka yanke ƙauna da duk wani ƙalubale da ka fuskanta; maimakon haka, ka kallesu a matsayin damar haɓaka da ingantawa.
- In a reflex arc, which neurone connects the sensory neurone to the motor neurone? A) Effector neurone B) Relay neurone C) Receptor neurone D) Connector neurone Answer: B
- Which hormone lowers blood glucose levels? A) Glucagon B) Adrenaline C) Insulin D) ADH Answer: C
- When looking at a near object, the ciliary muscles: A) Relax, making the lens thin B) Contract, making the lens fat C) Relax, making the lens fat D) Contract, making the lens thin Answer: B
- What is the role of auxin in phototropism? A) It kills cells on the lit side B) It accumulates on the shaded side, causing those cells to elongate more C) It accumulates on the lit side, causing those cells to elongate more D) It prevents growth on both sides Answer: B
- Vasodilation helps the body to: A) Conserve heat B) Lose heat C) Absorb more oxygen D) Digest food faster Answer: B
Yi aikin wadannan tambayoyi a cikin manhaja
Yi aikin wadannan tambayoyi a cikin manhaja
Littattafan da ake ba da shawarar karantawa
Ƙarin koyo daga tushe na buɗe
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Sashen littafi
Plant Sensory Systems and Responses
Describe how red and blue light affect plant growth and metabolic activities
"Biology: Plant Sensory Systems and Responses" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/biology/pages/30-6-plant-sensory-systems-and-responses. Access for free at https://openstax.org/books/biology/pages/1-introduction
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Sashen littafi
The Central Nervous System
Identify the spinal cord, cerebral lobes, and other brain areas on a diagram of the brain
"Biology: The Central Nervous System" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/biology/pages/35-3-the-central-nervous-system. Access for free at https://openstax.org/books/biology/pages/1-introduction
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