Endocrine system

1. What is the difference between endocrine and exocrine glands? Give an example of each.

Endocrine Glands Exocrine Glands

Specialized organs which release their chemical

directly into cells or surroundings. The released

chemicals of the endocrine system help in

regulation and maintenance of multiple

physiological events.

Specialized secretion which are released

through a duct directly into an external or

internal surfaces.

Ex: Help regulate body temperature through

sweat glands.

 Thyroid and Parathyroid

 Pineal Gland

 Testes and Ovaries

 Pituitary Gland

 Pancreas

 Hypothalamus

 Adrenal Glands

 Sebaceous Glands

 Mammary Glands

 Salivary Glands

 Lacrima glands

 Sweat glands

 Digestive System Glands

2. Explain positive and negative feedback regulation and give an example of hormone(s) that use

one of these methods.

Positive Feedback Negative Feedback

The output affects the beginning Stimulus

Analogy Ex: Snowball effect

The output stops the beginning stimulus and

sets it back to normal

Analogy Ex: Home Thermostat

Real Example: Child Birth, oxytocin is released

and intensifies contractions

Real Example: The control of blood sugar due

to insulin

3. Explain how the pituitary gland is controlled (anterior and posterior).

 The hormones of the pituitary gland send signals to other endocrine glands to stimulate

or inhibit their own hormone production. For example, the anterior pituitary lobe will

release adrenocorticotropic hormone (ACTH) to stimulate cortisol production in the

adrenal glands when you’re stressed.

 The anterior lobe releases hormones upon receiving releasing or inhibiting hormones

from the hypothalamus. These hypothalamic hormones tell the anterior lobe whether to

release more of a specific hormone or stop production of the hormone.