Lecture 19: Endocrine Flashcards
(132 cards)
What is the endocrine system a series of?
Discrete glands, that you can see
What makes endocrine tissues different from glands?
They are just tissues, not discrete glands and are integrated into other tissue and they have endocrine properties
Where are Endocrine Tissues found?
- Digestive tract
- Kidneys
- Heart
- Adipose tissue
What is the Endocrine system?
A collection of glands and tissues of the body that secrete chemical messengers (hormones) into blood directly or via interstitial fluid or lymph
How do the endocrine system and the nervous system work together?
They both regulate processes in the body
What are the two types of Glands?
Exocrine and Endocrine
What do Exocrine glands do?
Release their secretions into ducts that carry the secretions to an epithelial surface
What do Endocrine glands do?
Release their secretions into blood (directly or via interstitial fluid)
What are examples of Exocrine glands?
Sweat, Mammary, Salivary
What are examples of Endocrine glands?
Thyroid, Pituitary, Adrenal
What does Glandular Epithelium consist of?
Specialized cells that synthesize, store, and secrete chemical substances
What is a Hormone?
A chemical messenger
What are hormones produced and secreted by?
Endocrine cells
How does a Hormone facilitate acting on specific target cells?
They can only bind to cells with certain receptors
What do Hormones travel through?
The blood
What are signals sent by in the Nervous system?
Neurons
What are signals sent by in the Endocrine system?
Endocrine glandular cells
How are signals conducted in the nervous system?
Electrical impulses are conducted along axons + neurotransmitters
How are signals conducted in the Endocrine system?
They are circulated in the bloodstream
What is the difference in specificity in the Nervous and Endocrine system?
The nervous system is highly specific and the endocrine system has widespread activity
What is the difference in duration between the Nervous and Endocrine system?
The nervous system has short term activity and the endocrine system has a long duration
How is there interaction between the nervous and endocrine system?
- The nervous system can control the endocrine system, especially though the pituitary glands
- Hormones can also feedback and affect neural function
Which chemical messengers do both neurons and gland cells secrete?
Adrenaline and Vasopressin (ADH)
What do hybrids between and endocrine cell and a neuron do?
They conduct electrical signals but release a hormone at the end