SDSU BIO 212 Exam 4 Questions and
Correct Answers
Nervous system - CORRECT ANSWERS -1. Works w endocrine system
2. Allows us to reason, conceptualize, integrate info
3. Chemical signals: NTM (nervous system) and hormones (endocrine system)
Functions of the nervous system - CORRECT ANSWERS -1. Perceive sensory changes and convey
to CNS
2. Integrate, analyze, store info.
3. Initiate response to info (activation or inhibition)
What makes up PNS? - CORRECT ANSWERS -cranial nerves, spinal nerves, ganglia, receptors
Somatic motor NS - CORRECT ANSWERS -1. Synapse skeletal muscle
2. Voluntary
3. Stimulates contractions
Visceral (Autonomis) motor NS - CORRECT ANSWERS -1. Synapse smooth and cardiac muscle,
fat, glands
2. Stimulation or inhibition
3. Involuntary
4. Subdivisions: parasympathetic & sympathetic NS
Nervous tissue - CORRECT ANSWERS -1. Conducts and supports impulses
2. Excitability
3. Neurons and neuroglia
4. Star-like shape
Neuroglia - CORRECT ANSWERS -1. Can't transmit impulse
2. Supports neurons and impulses
3. Can divide
4. Vary in shape and function
, Neuroglia of the CNS - CORRECT ANSWERS -astrocytes, oligodendrocytes, microglia, ependymal
cells
Astrocytes - CORRECT ANSWERS -form blood brain barrier, structural support, star-like
apprearance
Oligodendrocytes - CORRECT ANSWERS -myelinate axons in the CNS, improper function can
lead to MS
Ependymal cells - CORRECT ANSWERS -lines ventricles, forms, circulates CSF
Microglia - CORRECT ANSWERS -removal of pathogens, debris, waste
Possibly derived from WBC
Neuroglia of PNS - CORRECT ANSWERS -Schwann cells and satellite cells
Schwann cells - CORRECT ANSWERS -regenerate axons and myelinate axons of PNS
Satellite cells - CORRECT ANSWERS -surrounds and protects ganglia cell bodies
Regulates gases, nutrients, NTM levels
What axons are grey? - CORRECT ANSWERS -unmyelinated
What axons are white? - CORRECT ANSWERS -myelinated
Neurons - CORRECT ANSWERS -1. Transmits impulses
2. High excitability
3. High metabolic rate
4. Can't divide
5. Extreme longevity
6. Grey
7. Size varies
Structural neurons - CORRECT ANSWERS -anaxonic, unipolar, multipolar, bipolar
Nerves - CORRECT ANSWERS -1. Contain fibers
2. Bundles wrapped in CT sheath
3. Connect CNS tp rest of body
4. Cranial and spinal
Brain development at 3 weeks - CORRECT ANSWERS -forebrain - prosencenphalon
Correct Answers
Nervous system - CORRECT ANSWERS -1. Works w endocrine system
2. Allows us to reason, conceptualize, integrate info
3. Chemical signals: NTM (nervous system) and hormones (endocrine system)
Functions of the nervous system - CORRECT ANSWERS -1. Perceive sensory changes and convey
to CNS
2. Integrate, analyze, store info.
3. Initiate response to info (activation or inhibition)
What makes up PNS? - CORRECT ANSWERS -cranial nerves, spinal nerves, ganglia, receptors
Somatic motor NS - CORRECT ANSWERS -1. Synapse skeletal muscle
2. Voluntary
3. Stimulates contractions
Visceral (Autonomis) motor NS - CORRECT ANSWERS -1. Synapse smooth and cardiac muscle,
fat, glands
2. Stimulation or inhibition
3. Involuntary
4. Subdivisions: parasympathetic & sympathetic NS
Nervous tissue - CORRECT ANSWERS -1. Conducts and supports impulses
2. Excitability
3. Neurons and neuroglia
4. Star-like shape
Neuroglia - CORRECT ANSWERS -1. Can't transmit impulse
2. Supports neurons and impulses
3. Can divide
4. Vary in shape and function
, Neuroglia of the CNS - CORRECT ANSWERS -astrocytes, oligodendrocytes, microglia, ependymal
cells
Astrocytes - CORRECT ANSWERS -form blood brain barrier, structural support, star-like
apprearance
Oligodendrocytes - CORRECT ANSWERS -myelinate axons in the CNS, improper function can
lead to MS
Ependymal cells - CORRECT ANSWERS -lines ventricles, forms, circulates CSF
Microglia - CORRECT ANSWERS -removal of pathogens, debris, waste
Possibly derived from WBC
Neuroglia of PNS - CORRECT ANSWERS -Schwann cells and satellite cells
Schwann cells - CORRECT ANSWERS -regenerate axons and myelinate axons of PNS
Satellite cells - CORRECT ANSWERS -surrounds and protects ganglia cell bodies
Regulates gases, nutrients, NTM levels
What axons are grey? - CORRECT ANSWERS -unmyelinated
What axons are white? - CORRECT ANSWERS -myelinated
Neurons - CORRECT ANSWERS -1. Transmits impulses
2. High excitability
3. High metabolic rate
4. Can't divide
5. Extreme longevity
6. Grey
7. Size varies
Structural neurons - CORRECT ANSWERS -anaxonic, unipolar, multipolar, bipolar
Nerves - CORRECT ANSWERS -1. Contain fibers
2. Bundles wrapped in CT sheath
3. Connect CNS tp rest of body
4. Cranial and spinal
Brain development at 3 weeks - CORRECT ANSWERS -forebrain - prosencenphalon
