Chapter 16 Endocrine Flashcards
What are the 2 major systems that communicate and coordinate body function?
- Endocrine
- Nervous
What is the Endocrine system?
-Hormones that signal via receptors
- Influences Metabolic activity
How long does it take for an Endocrine response?
could take seconds to days for a response
How are things in the endocrine system transported?
Via blood
Size of things that flow through the endocrine system?
1X10-9 M to 1X10-12 M
What is the Nervous system?
-Electrochemical Gradients
-Influences muscle and gland activity
How long does it take for a nerve impulse response?
Milliseconds
How are impulses transported through the nervous system?
Electrochemical impulses
Function of the Endocrine system
-Products are secreted directly into the blood stream
- DUCTLESS NO DUCTS
- Distance
Function of the Exocrine System
- Has Ducts
- collecting area for products (storage)
- excreted out
What is the Autocrine system?
- product is released by the cell that causes it to re-bind with cell to cause self-change/self-signaling
-Not a lot of these
AUTO=Self
CRINE= Signaling
What is the Paracrine system?
-cell secretes something that then bings and signals neighboring cell
- Stays in the tissue
PARA= Next to
What is a Hormone?
Chemicals carried through blood/lymph to target tissues
- recognized by specific high affinity receptors on target cells
EX: Target cell = office door; If another key (hormone) tries to bind with it, it will not open (work)
When a hormone binds, what does it result in?
- Altered plasma membrane perm.
- Opening/Closing of protein channels
- stimulates the synthesis of enzymes and proteins
- activates/deactivates enzymes
- Induces secretory activity
- Stimulates Mitosis
- Stimulates transcription
What is the plasma membrane/lipid bilayer made up of?
Hydrophobic and hydrophilic lipids
