6.5 Nerves, Hormones and Homeostasis

Nerves Hormones amp Homeostasis

Stephen Taylor i-Biologynet

Assessment Statements Obj

651 State that the nervous system consists of the central nervous system (CNS) and peripheral nerves and is composed of cells called neurons that carry rapid electrical impulses 1

652 Draw and label a diagram of the structure of a motor neuron 1

653 State that nerve impulses are conducted from receptors to the CNS by sensory neurons within the CNS by relay neurons and from the CNS to effectors by motor neurons 1

654 Define resting potential and action potential (depolarisation and repolarisation) 1

655 Explain how a nerve impulse passes along a non-myelinated neuron 3

656 Explain the principles of synaptic transmission 3

657 State that the endocrine system consists of glands that release hormones that are transported in the blood 1

658State that homeostasis involves maintaining the internal environment between limits including blood pH carbon dioxide concentration blood glucose concentration body temperature and water balance

1

659 Explain that homeostasis involves monitoring levels of variables and correcting changes in levels by negative feedback mechanisms 3

6510 Explain the control of body temperature including the transfer of heat in the blood and the roles of the hypothalamus sweat glands skin arterioles and shivering 3

6511 Explain the control of blood glucose concentration including the roles of insulin glucagon and α and β cells 3

6512 Distinguish between type I and type II diabetes 2

Assessment statements from Online IB Biology Subject GuideCommand terms httpi-biologynetibdpbiocommand-terms

Diagram from httpcommonswikimediaorgwikiFileAnatomy_and_physiology_unlabeled_neuronjpg

The Motor Neuron

nerve impulse

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From McGraw Hill httpgoogltI2MD

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The Endocrine SystemA stimulus is received and processed Hormones are secreted directly into the blood They are carried to the target tissues (the place of intended action) The action of the hormone changes the condition of the tissue This change in monitored through feedback Most hormonal change results in negative feedback

Key endocrine glands 1 Pineal gland2 Pituitary gland3 Thyroid gland4 Thymus5 Adrenal gland6 Pancreas7 Ovary (female)8 Testes (male)

Endocrine glands from httpenwikipediaorgwikiEndocrine_gland


Key endocrine glands 1 2 3 4 5 6 7 8


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IBiologyStephen

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Assessment Statements Obj

651 State that the nervous system consists of the central nervous system (CNS) and peripheral nerves and is composed of cells called neurons that carry rapid electrical impulses 1

652 Draw and label a diagram of the structure of a motor neuron 1

653 State that nerve impulses are conducted from receptors to the CNS by sensory neurons within the CNS by relay neurons and from the CNS to effectors by motor neurons 1

654 Define resting potential and action potential (depolarisation and repolarisation) 1

655 Explain how a nerve impulse passes along a non-myelinated neuron 3

656 Explain the principles of synaptic transmission 3

657 State that the endocrine system consists of glands that release hormones that are transported in the blood 1

658State that homeostasis involves maintaining the internal environment between limits including blood pH carbon dioxide concentration blood glucose concentration body temperature and water balance

1

659 Explain that homeostasis involves monitoring levels of variables and correcting changes in levels by negative feedback mechanisms 3

6510 Explain the control of body temperature including the transfer of heat in the blood and the roles of the hypothalamus sweat glands skin arterioles and shivering 3

6511 Explain the control of blood glucose concentration including the roles of insulin glucagon and α and β cells 3

6512 Distinguish between type I and type II diabetes 2

Assessment statements from Online IB Biology Subject GuideCommand terms httpi-biologynetibdpbiocommand-terms


The Motor Neuron

nerve impulse














IBiologyStephen

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The Motor Neuron

nerve impulse














IBiologyStephen

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IBiologyStephen

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6.5 Nerves, Hormones and Homeostasis

Education

Transcript of 6.5 Nerves, Hormones and Homeostasis