{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

3-4-08 notes - March 4 2008 NERVOUS SYSTEM(CHAPTER 8 Themes...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
March 4, 2008 NERVOUS SYSTEM (CHAPTER 8) Themes Active vs. Passive Transport across membranes Diffusion across Concentration Gradients Highly specific receptor-mediated responses CQ: Epinephrine can: A) Cause vessel dilation B) Cause vessel constriction C) Can stimulate the release of glucose from the liver D) A and B E) A, B, and C Endocrine disruptors Endocrine disruptors o Natural or synthetic compounds o Interfere with normal endocrine function o Widespread in the environment Potent at LOW concentrations Effects in humans and animals How do the Endocrine and Nervous Systems Differ? Hormones o More slowly acting o Control of things that change over long time periods (minutes to years)
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
o Specialized glands o Travel throughout bloodstream o Examples Growth Reproduction Neurotransmitters o Rapid acting o Control over short time periods (seconds to minutes) o Released by neurons o Cross synapses o Examples Heart rate Respiration Voluntary muscle contractions What does the nervous system do? Fundamental challenges o Coordination Sensory system Response to stimuli o Integration of bodily functions Responsible for what we think, feel, how we behave Nervous System 1) Central Nervous System
Background image of page 2
a. Brain b. Spinal cord Integrated info that is taken in internally and externally 2) Peripheral Nervous System a. Everything else—cranial nerves & spinal nerves Carries out commands from the central nervous system Peripheral Nervous System Somatic Nervous System o Skeletal muscles o Voluntary movements o Coordinated info that is taken in and coordinated the action of your skeletal muscles Autonomic Nervous System o Internal environment o Involuntary movements How muscle’s move a bolus of food through your digestive tract o Coordinated info that I received internally o Helps regulate your internal environment o 3 classes Sympathetic Nervous System Flight or flight How your body responds to new things Ex. Pupil dilation, accelerated heart beat, adrenal medulla
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}