Karteikarten
The Nervous System and Hormones (Part 1)
Karten in diesem Stapel (29)
- 1Stimulusa change in the environment of an organism
- 2The central nervous system is made up of....The brain and the spinal cord
- 3Neuronbundle of nerve cells
- 4An Effectorany part of the body that produces a responce
- 5Nerve Fibresbundles of nerve cells that pass on electrical signal to the brain
- 6Sensory neuronescarry impulses from receptors to the spinal cord
- 7Relay neuronscarry impulses to and from the spinal cord
- 8Motor neuronscarry impulses from the brain to the effector
- 9Synapeis a junction between two neurons
- 10neurotransmittersmolecules that are released as a chemical to diffuse across a synape
- 11Reflex arcWhen your body needs to react to something very quickly and sends the impulse through before it reaches the brain
- 12In bright light eyes...1. radial muscles of the iris relax
2. circular muscles of the iris contract
3. recieve less light through contracted pupil - 13In dim light our eyes..1. Radial muscles of iris contract
2. Circular muscles of iris relax
3. Receive more light through dilated pupil - 14calliary musclespull lens for focusing
- 15cornealets light into eye and focuses
- 16iriscontrols the amount of light entering eye
- 17lensfocuses light onto the retina
- 18optic nervesends signals to the brain
- 19pupillets light through to lens
- 20retinalight sensitiv layer that sends signals to the optic nerve
- 21suspensory ligamentshold lens in place
- 22Hormones (in people)are chemical messengers that co-ordinate systems in the body
- 23What are the two types of glands found in the bodyendocrine and exocrine glands
- 24Pituitary Glandis linked by nerves to the hypothalumos in the brain and produces many hormones
- 25The pancreasis both an endocrine and an exocrine gland wich reguate blood
- 26What happens when adrenaline is released into the body?-pupil dilate
-breathing becomes faster and deeper
-heart beats faster
-hair stands on end
-glucose is released from liver
-blood is directed away from gut towards liver - 27Homeostasisis the maintenance of a constant internal environment
- 28What does the body do in response to a sudden increase in temperature?-Sweating
-Vascodilation - 29What does the body do in response to a sudden decrease in temperature?-Shivering
-Hair stands on end
-Vascoconstriction
Informationen
- Beschreibung
- IGCSE prep for the Nervous System and hormones on a grade 10 level
- Erstellt von
- Naomi Science
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