UW-Madison BIOLOGY 101 - Neurons (3 pages)

Previewing page 1 of 3 page document View the full content.
View Full Document

Neurons



Previewing page 1 of actual document.

View the full content.
View Full Document
View Full Document

Neurons

485 views


Lecture number:
23
Pages:
3
Type:
Lecture Note
School:
University of Wisconsin, Madison
Course:
Biology 101 - Zoology 101: Animal Biology
Edition:
1
Documents in this Packet

Unformatted text preview:

Zoology 101 Animal Biology Last Lecture Outline Lecture 23 1 Lungs gas exchange in the lungs 2 Circulatory system 3 Blood Current Lecture 1 Neuroscience Dendrites Nervous systems 2 How does a neuron transmit a signal Neuroscience Nervous systems provide a rapid response by integrating internal and external information made up of neurons and supporting cells The more complex you get in animal body plans the more complex the nervous system Sponges do not have a nervous system Vertebrae have several hundred thousand neurons a spinal cord and sensory ganglia Cephalization cluster of interneurons and sensory neurons at the front end brain Neuron Dendrites receive the signal cell body maintains the neuron axon hillock generates the signal point of summation The axon sends signals to terminal branches myelin sheath coats the terminal Synaptic terminal sends signal to other cell Vertebrae nervous system has a central nervous system brain spinal cord and a peripheral nervous system Peripheral nerves are outside of CNS Comprised of 3 components 2 efferent 1 afferent Efferent Motor system Signals skeletal movement Autonomic involuntary controls smooth muscles Afferent sensory system external cue Subdivisions Afferent take to the brain internal external stimuli CNS CNS will send out to the PNS Autonomic splits into sympathetic parasympathetic enteric involuntary and motor system control of skeletal muscle voluntary Sympathetic regulates arousal and energy generation fight or flight secretes epinephrine inhibits digestion increases heart rate Parasympathetic promotes calming and a return to rest digestion functions decreases heart rate increases digestion Enteric controls activity of digestive tract pancreas and gall bladder regulates secretions and peristalsis Complex animals CNS interacts with PNS see figure 49 3 in book Class example a hyena and a dead zebra sensory neurons input PNS CNS Interneurons and integration Motor effector neurons output CNS PNS Form of neurons match



View Full Document

Access the best Study Guides, Lecture Notes and Practice Exams

Loading Unlocking...
Login

Join to view Neurons and access 3M+ class-specific study document.

or
We will never post anything without your permission.
Don't have an account?
Sign Up

Join to view Neurons and access 3M+ class-specific study document.

or

By creating an account you agree to our Privacy Policy and Terms Of Use

Already a member?