Homeostasis Topic 6.5

Nerves, Hormones & Homeostasis

Structure of a Motor Neuron ,[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object]

Humans have three types of neuron : ,[object Object],[object Object],[object Object]

Sensory neurons, (interneuron's) relay nerves and motornerons. ,[object Object],[object Object],[object Object],[object Object]

Membrane potentials ,[object Object],[object Object],[object Object],[object Object]

Resting Potential Re-polarization Action potential Depolarization Resting Potential

Resting Potential and Action Potential ,[object Object]

Sodium-Potassium ATPase ,[object Object],[object Object],[object Object],[object Object],[object Object]

Resting Potential & Action Potential ,[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object]

[object Object],[object Object],RP: Resting Potential DP: Depolarization AP: Action Potential ReP: Repolarization RFP: Refractory Period TH: Threshold

Depolarization ( DP ) ,[object Object],[object Object],[object Object],[object Object]

Repolarization ( ReP ) ,[object Object],[object Object],[object Object],[object Object]

How a nerve impulse travels along an axon ,[object Object],[object Object]

[object Object],Section A: The Refractory Potential

[object Object],Section B) Action Potential

[object Object],Section C) Resting Potential

Threshold (TH): ,[object Object]

Re factory Period (ReP) : ,[object Object],[object Object],[object Object],[object Object]

Human Nerve Propagation: ,[object Object]

Synaptic Transmission ,[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object]

Monitoring & Responding ,[object Object]

Homeostatic processes ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Model: regulation of the internal environment between narrow limits

Endocrine and Nervous System Control ,[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],Control of The Nervous System

Temperature Control ,[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],Note the particular features of skin which are involved in temperature regulation:

Keeping heat in ,[object Object],[object Object],[object Object],[object Object],[object Object]

Releasing Heat ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Sweating and heat loss : ,[object Object],[object Object],[object Object],[object Object]

Shivering and heat gain: ,[object Object],[object Object],[object Object]

Hair and temperature control : ,[object Object],[object Object],[object Object],[object Object]

Endocrine control of homeostasis: ,[object Object],[object Object],[object Object],[object Object]

Endocrine control of homeostasis

Endocrine System generally; ,[object Object],[object Object]

Control of blood glucose concentration ,[object Object],[object Object],[object Object]

Model : ,[object Object],[object Object],[object Object],[object Object]

Blood sugar after a meal Note the glucose levels remain within a set of narrow limits This is a typical feedback control.

Cells responsible for maintaining blood sugar levels

Diabetes ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Excretion ,[object Object],[object Object],[object Object],[object Object]

Role of the kidney in excretion and the maintenance of water balance ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Homeostasis Topic 6.5

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Homeostasis Topic 6.5