| Term |
Information |
| central part of cell where nucleus is found |
cell body |
| usually multiple and short, carry impluses toward cell bodies. |
dendrite |
| single process, usu. long, carries impulses away from cell body |
axons |
| CNS |
made up of brain and spinal cord |
| PNS |
spinal nerves, cranial nerves, and associated ganglia. |
| Controls voluntary activities, skeletal muscles |
Somatic nervous system |
| Controls involuntary activities, smooth and cardiac muscles, glands |
Autonomic nervous system |
| How many pairs of spinal nerves are there? |
31 |
| How many pairs of cervical spinal nerves are there? |
8 |
| ulnar and median nerves both are in what plexus? What do they do? |
supply muscles of forams and hiands. supply skin of thumbs |
| Where does the spinal nerve C1 exit the vertebral column? |
Exits between the occipital bone and C1. |
| How are the spinal nerves from T1 down named? |
Named according to the vertebrae located above them. |
| Where would the spinal nerve L4 exit? |
between L4 and L5 |
| Spinal nerves are formed by the union of what two things? |
ventral and dorsal root |
| Ventral root consist of what type of nerve fibers and which direction to they carry impulses? |
Motor or efferent fibers, carry impulses away from CNS |
| Dorsal root consists of what type of fiber and what direction do they carry impulses? |
sensory or afferent fibers, carry impulses toward CNS. |
| The radial nerves are in what plexus? They supply what? |
Thumb, and posterior muscles or arms and skin of forearms and hands....triceps??? |
| Which nerves are segmented? |
thoracic nerves |
| Cervical plexus is formed by the ventral rami of which nerves? |
C1-C5 |
| Bracial plexus is formed by which ventral rami? |
C5-T1 |
| Lumbar plexus is make up of which ventral rami? |
T12-L4 |
| Sacral plexus is made up of which ventral rami? |
L4-S5 |
| Area of skin innervated by the sensory fibers of a given spinal nerve? |
Dermatomes |
| Responsible reception, integration, and transmission of nerve impulses. |
neuron |
| Responsible for supporting and protecting neurons. |
neuroglial cells |
| What is the longerst nerve in the body? Does it extend for L3, L4, and L5? True or False |
Sciatic: True |
| The Sciatic nerves do not supply muscles to the skin of thigh, legs, and feet. True or False |
False |
| Femoral nerves supply impulses to muscles to anterior thigh and sensory impuleses from the skin of thighs and legs |
True |
| above the knee is the leg |
false |
| the orbitor nerves supply motor impulses to what part of the body |
thigh |
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