Regulatory Mechanisms Study Notes | Western Sydney University - Edubirdie

University:
Western Sydney University
Course:
MEDI 2003 | Clinical Sciences 2
Academic year:

2024
Views:

127

Pages:

3
Author:

Mariam A. A.

REGULATORY MECHANISMS Thermoregulation Mechanisms Component Stimulus Receptors Afferent pathway to control centre Efferent pathway from the control centre to the receptors Receptors such as glands, blood vessels and skeletal muscles Response Feedback Response to increased temperature increase in body temperature when exercising or when external temperature is hot thermoreceptors in the skin detect change in temperature; receptors in the hypothalamus detect rise in blood temperature heat loss centre in the hypothalamus is activated (heat promoting centre shuts off) message sent from the hypothalamus to blood vessels in the skin and sweat glands blood vessels dilate; capillaries become flushed with blood and sweat glands are activated Response to decreased temperature decrease in body temperature when external temperature is cold thermoreceptors in the skin detect change in temperature; receptors in the hypothalamus detect decrease in blood temperature heat promoting centre in the hypothalamus is activated (heat loss centre shuts off) message sent from the hypothalamus to blood vessels in the skin and skeletal muscles blood vessels constrict; blood is diverted from skin capillaries to deeper tissues; skeletal muscles are activated heat radiates from the skin's heat loss from skin surface is surface so that the body cools minimised; shivering begins, down and heat is produced evaporative heat loss due to perspiration Blood temperature drops Blood temperature rises Glucose Regulation The pancreas produces two hormones, insulin and glucagon, and these regulate the amount of glucose in the blood. Insulin lowers blood glucose (blood sugar) levels by facilitating glucose transport from the blood into cells. Glucagon raises blood glucose levels by metabolising glycogen into glucose.

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