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Endocrine system

and duration of action. The nervous system
provides quick, short-lived responses. Exercise 3.1
For example, in dangerous situations, 1. Describe the main functions of the
the sympathetic nervous system activates endocrine system and explain how
the “fight-or-flight” response, increasing it differs from the exocrine system.
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heart rate and redirecting blood to critical 2. Explain how the pancreas functions
organs. The endocrine system governs long- as both endocrine and exocrine gland.
term processes such as growth, metabolic
regulation, and reproductive functions. 3. Evaluate the impact of lifestyle
For instance, growth hormone from the choices, such as diet and physical
pituitary gland influences height and tissue activity, on the functioning of the
development over an extended period. endocrine system.
4. Evaluate the role of the hypothalamus
Stress response and system integration in linking the endocrine and nervous
The interaction between these systems systems. How does this interaction
is evident in the body’s response to contribute to body regulation?
stress. When faced with a stressor, the
hypothalamus activates the sympathetic
nervous system, prompting the adrenal Hormones produced by endocrine
medulla to release adrenaline for an glands
immediate reaction. Simultaneously, the Task 3.3
hypothalamic-pituitary-adrenal (HPA) axis Search for information from the library
is activated, leading to cortisol release from and internet sources on various hormones
the adrenal cortex. This combined response produced by endocrine glands, then
ensures both an immediate reaction and summarise your findings.
prolonged adaptation to stress.
The summary for major endocrine glands,
Generally, the nervous and endocrine their locations, the hormones they secrete,
systems function together to regulate the functions of each hormone and
essential physiological processes, ensuring disorders associated with hormonal excess
stability and adaptation to internal and or deficiency is shown in Table 3.1.
external changes. Their interaction,
facilitated by the hypothalamus-pituitary Pituitary hormones
axis, neuroendocrine functions, and stress The pituitary gland, often referred to as
response mechanisms, is critical for the “master gland,” plays a central role in
homeostasis. regulating various physiological processes
by secreting a range of hormones. It is
located at the base of the brain, beneath
the hypothalamus, and is divided into two

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