Endocrine System Quiz

Endocrine glands release hormones internally and are ductless, while exocrine glands release nonhormonal substances externally through ducts. An example of an endocrine gland is the thyroid gland, and an example of an exocrine gland is the sweat gland.

The 3 types of stimuli are humoral stimuli, neural stimuli, and hormonal stimuli. An example of humoral stimuli is low calcium levels in the blood triggering the parathyroid glands to release parathyroid hormone (PTH). An example of neural stimuli is the release of hormones caused by neural input.

Negative feedback mechanisms involve the target/effector organ's response feeding back to inhibit further hormone production. When hormone levels reach a certain point, the response of the target organ inhibits the further production of that hormone.

<p>Three key structures are the hypothalamus, pancreas, and gonads. The hypothalamus regulates various physiological processes, the pancreas secretes insulin and glucagon to regulate blood sugar levels, and the gonads produce sex hormones.</p> Signup and view all the answers

<p>The placenta serves as an endocrine organ during pregnancy, producing hormones such as estrogen, progesterone, and human chorionic gonadotropin (hCG) to support the pregnancy and fetal development.</p> Signup and view all the answers