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24 Cards in this Set
- Front
- Back
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Endocrine System
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A system of ductless glands that secrete hormones into the blood stream as a response to a stimulus.
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Pituitary Gland
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Located at the base of the brain, controls endocrine regulation,secrets hormones that regulate activity.
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Hypothalamus
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Located at the base of the brain, co-ordinates nervous and endocrine systems. In directly controls many functions.
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Hormones
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Diverse range of compounds, affective at low concentrations, chemical messengers, alter specific biochemical reactions in target cells by transmitting signals.
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Parathyroid Gland
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Located on the surface of the thyroid gland, regulates calcium levels.
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Pancreas
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Specialised alpha and beta cells produce insulin and glucogan together these control blood glucose levels.
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Thyroid Gland
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Secrets thyroxin, a hormone needed for normal growth, stimulates regular growth and metabolic functions.
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Adrenal Glands
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produces adrenalin and noradrenalin, responsible for fight or flight response.
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Gonads
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ovaries and testies, produce reproductive hormones at puberty which help sitimulate the growth of body parts, hair and sperm/ovum.
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The Nervous system
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Made up of the CNS and PNS it uses electrical impulses around the body in response to a stimulus.
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CNS
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Central Nervous System consists of the Brain and Spinal Cord
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PSN
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Peripheral Nervous System consists of all other nerve cells that lie outside the CNS
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Sensory nervous system
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Afferent somatic and visceral nerve fibres bring information to the CNS from sensory receptors
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Motor nervous system
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Efferent motor nerve fibres convey signals from the CNS to effector cells. Made up of Autonomic(involentary) and Somatic (volentary) systems.
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Sympathetic nervous system
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supports physical activity of the body causes heart muscles to contract more quickly and metabolic rate to rise.
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Parasympathetic nervous system
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directs body function when we are relaxed.
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Neurons
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Affector Neurons - sensory
Effector Neurons - motor Connecting Neurons - Interneurons |
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Cell body/Centron
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Contains the nucleus and cytoplasm of a neuron
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Axon
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The extention that carries infomration away from the cell body to another neuron tissue, conducts impulses.
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Dendrites
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Highly branched extensions that detects the stimulus and transferes it towards the cell body.
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Myelin Sheath
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Fatty tissue that insulates the Axon. Increase the rate at which nerve impulses are conducted along the auxin
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Sensory Neurons
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Detects sensory stimulus, transfered through the spinal cord.
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Interneuron
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Carry the impulses from sensory to motor neurons
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Motor Neurons
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Transmit impulses from the CNS to the muscle glands
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