Flashcards in Nervous/Endocrine Deck (49):
Relationship b/w regulation, homeostasis, and metabolism?
Regulation controls/coordinates Metabolism in order to maintain Homeostasis
Similarity b/w nervous and endocrine?
Maintains homeostasis and secretes chemicals (nerves secrete Neurotransmitters while endocrine glands secrete hormones)
Differences b/w nervous and endocrine?
Nervous response are rapid, endo response takes long time.
Nerves transmit impulses carried by neurons, hormones carried by plasma
Cell body of neuron which contains nucleus and organelles
Short, highly branched fiber receptors that receive impulses
Long, thin fiber that carries impulses away from cell body
Fatty later that surrounds axon and allows impulses to be sent quickly (insulator)
Send impulses to next neuron (terminal and dendrite don't TOUCH)
Gaps between neurons
Signals released and sent from one neuron to another (specific shape!)
Carry impulses IN from receptors (SENSES) to spinal cord and brain
(Inter=between) relays impulses from one neuron to another in brain/spinal cord
Carry impulses OUT from brain/spinal cord to effectors (muscles or glands)
Bundle of neurons
Normal pathway response?
Stimulus>receptor (sense organ)>sensory neuron>CNS (Interneurons)>motor neuron>effector (muscle or gland)
Stimulus>receptor>sensory neuron>Interneuron (Spinal cord ONLY, no brainer!)>motor neuron>effector (muscle/gland)
Coordination of VOLUNTARY activities/BALANCE AND CONTROL
INVOLUNTARY (automotive) activities like breathing/heartbeat, top of spinal cord
Regulates REFLEXES, carries nerve impulses b/w various parts of body/brain
Peripheral nervous system (PNS)
All parts of body
Somatic nervous system
Controls VOLUNTARY muscles an receives stimuli from sense organs/ transmits them to CNS
Automatic nervous system
Controls INVOLUNTARY heart muscles, glands, smooth muscles of digestive organs
Ductless glands that secrete hormones into bloodstream
Sex organs (testes/ovaries)
Chemical produced in one part of an organ and transported to another part
Change in one quantity causes a change in the second quantity which then causes a change in the first
Portion of the brain that connects the endocrine and nervous system and controls pituitary glands
Receive, conduct, and send impulses (electrical and chemical messages)
produce more thyroxin, egg development, long bone development. releases TSH FSH GH targets other glands.
controls rate of metabolism, physical and mental development releases thyroxin and targets all tissues
regulates metabolism of calcium and phosphates. releases parathormone. targets bones
controls heart rate, blood sugar level and blood clotting rate. releases adrenaline (epinephrine) targets heart, pancreas and brain
Islets of Langerhand
in pancreas. blood sugar regulation. Releases glucagon and insulin targets all tissues
secondary female characteristics. releases estrogen. targets reproductive tissues
secondary male characteristics. Releases testosterone. targets reproductive tissues
improper insulin production. can't regulate blood sugar.
enlargement of thyroid due to insufficient iodine intake
can be caused by the pituitary gland not producing enough growth hormone
hormones are released by _______ and travel through the _________ to reach _______.
2) circulatory tissues
3) target tissues
protein molecules in the cell membrane that can receive chemical messages from other cells (SPECIFIC)
ex) neurotransmitters and neurons/ hormones in blood and target tissue
change in "A" --> change in "B" --> change in "A"
helps to maintain homeostasis ad keeps conditions normal
e.g. body temp regulations, blood sugar regulations, menstrual cycle
lowers blood sugar
increases blood sugar
spikes and sinks during the day
both the endocrine and nervous systems
regulate through chemicals
the nervous system
nerve responses are fast and short
transmits impulses via neurons