Ch 8 Nervous

5 Written Questions

1. sensory info (as action potentials) sent up spinal cord in white matter (axons)
2. space between presynaptic neuron's axon and postysnaptic cell (usually a dendrite or muscle cell)
3. bundle of axons in PNS
4. space above dura mater
5. most inferior portion of brain stem;
   regulates VITAL body functions, such as: heart rate, blood pressure, breathing, swallowing, and wakefulness, and consciousness

5 Matching Questions

1. action potential
2. parasympathetic division
3. longitudinal fissure
4. ventral root
5. motor neuron

1. a deep groove running from anterior to posterior dividing cerbrum into left and right hemispheres, connected by corpus callosum
2. b carry movement commands (as action potentials) from CNS to muscle cells via descending tracts;
   aka Efferent neuron ("Efferent Exits" brain)
3. c motor (efferent) branch of each spinal nerve;
   exits spinal cord on ventral side
4. d "rest-and-digest" division of ANS;
   conserves energy; increases digestion and absorption and relaxtion (ie, heart rate slows, glucose is stored, etc)
5. e quick electrical charge that travels "down" an axon towards synapse; Na+, K+, and Ca++ ions vital to this function; causes neurotransmitter release at synapse;
   aka neural impulse or "electrical signal"

5 Multiple Choice Questions

1. group of neurons in the PNS
   1. synapse
   2. ganglia
   3. axon
   4. neuroglia
2. brain region containing thalamus and hypothalamus;
   hypothalamus is an integral part of the limbic system, and thalamus is functionally connected to limbic system
   1. interneuron
   2. diencephalon
   3. midbrain
   4. axon
3. deep groove in brain
   1. pons
   2. fissure
   3. synapse
   4. sulcus
4. long, thin projection of neuron, which carries an electrical impulse (aka action potential) to synapse away from cell body;
   neurons have 1 axon
   1. axon
   2. gyrus
   3. pons
   4. neuron
5. convolution or ridge on surface of cerebrum;
   plural gryi
   1. sulcus
   2. pons
   3. nerve
   4. gyrus

5 True/False Questions

1. sensory receptor → detect environment (internal or external) & relays info to CNS;
   aka afferent receptors

   True        False

2. occipital lobes → posterior lobes of the cerebrum;
   contain visual processing areas

   True        False

3. mixed nerve → aka efferent nerve;
   carries motor commands (APs) from CNS to muscles

   True        False

4. central nervous system → brain and spinal cord;
   fast communicating organ system; receives sensory input; controls homeostasis (often via endocrine system); controls motor output; center of all mental activity including thought, feeling, learning & memory, and consciousness; aka CNS

   True        False

5. hypothalamus → bae of diencephalon governing autonomic nervous system; regulates and controls homesotasis, including blood pressure, heart rate, body temperature, hunger, thirst, "love" etc.; controls pituitary gland

   True        False