Term
| What is the function of the nervous system? |
|
Definition
| Monitor internal and external stimuli to maintain homeostasis, and coordinate muscle function. |
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
| Myelin sheath that covers axon sections, 10 glial cells to each neuron. |
|
|
Term
| What body parts make up the Central Nervous System? |
|
Definition
| The brain and spinal cord. |
|
|
Term
| What body parts make up the Peripheral Nervous System? |
|
Definition
| Cranial nerves, Ganglia, and Spinal Nerves. |
|
|
Term
| The Peripheral Nervous System divides into two types.. what are they? |
|
Definition
| Somatic (voluntary) and Autonomic (involuntary) |
|
|
Term
| Sensory nerve receptors collect or send information? |
|
Definition
|
|
Term
| Motor nerve receptors collect of send information? |
|
Definition
|
|
Term
| Name the 4 main sections of the brain. |
|
Definition
| Cerebrum, Cerebellum, Diencephalon, and the Brain Stem. |
|
|
Term
| What is the function of the cerebrum? |
|
Definition
| sensory, memory, thought, and consciousness. |
|
|
Term
| What are the functions of the cerebellum? |
|
Definition
| coordinate movement and balance. |
|
|
Term
| What are the functions of the Diencephalon? |
|
Definition
| Produce and manage hormones, and homeostasis. |
|
|
Term
| What are the functions of the brain stem? |
|
Definition
| controls life-supporting subconscious functions. |
|
|
Term
| What organs make up the diencephalon? |
|
Definition
| Thalamus, Hypothalamus, and the pituitary gland. |
|
|
Term
| What is the purpose of the Blood-Brain Barrier (BBB)? |
|
Definition
| To protect the brain from potential toxins in circulating blood. |
|
|
Term
| What two structures support and protect the brain? |
|
Definition
|
|
Term
| What are the three types of meninges? |
|
Definition
| Dura mater, arachnoid, and pia mater. |
|
|
Term
| What order are they found? |
|
Definition
pia mater (bottom / closest to brain)
arachnoid (middle layer), and
dura mater (tough fibrous outter layer). |
|
|
Term
|
Definition
|
|
Term
|
Definition
| clear fluid that circulates the CNS to provide protection, support and nurishment. |
|
|
Term
| What is the primary function of the spinal cord? |
|
Definition
relays sensory & motor information to the brain.
houses reflex arcs. |
|
|
Term
| Doral horn of gray matter in the spine does what? |
|
Definition
| carries sensory impulses to the brain. (IN) |
|
|
Term
| Ventral horn of gray matter in the spine does what? |
|
Definition
| carries motor impulses to the spinal nerves. (OUT) |
|
|
Term
| What are the three supportive and protective layers of the spine? |
|
Definition
| Vertebrae, Epidural space, and meninges. |
|
|
Term
| Neuron firing has 4 stages, what are they? |
|
Definition
| Resting state, Depolarization, Beginning of re-polarization, and re-polarization. |
|
|
Term
| What happens in the "resting" state of a neuron? What is its charge? |
|
Definition
| Sodium is actively pumped out of the neuron while potassium is pumped in. (3Na:2K) Neuron is NEGATIVELY charged. |
|
|
Term
| What happens in the "depolarization" state of a neuron? What what is its charge? |
|
Definition
| A stimulus causes the sodium channel to open, allowing an over flow of sodium into the neuron. Neuron is POSITIVELY charged. |
|
|
Term
| What happens in the "beginnning of re-polarization" state? What is its charge? |
|
Definition
| The sodium channel quickly closes and the potassium gate opens. The charge is rapidly changing. |
|
|
Term
| What happens in the "re-polarization" state of a neuron? What is its charge? |
|
Definition
| Sodium and Potassium pumps restore back to the original ratio of 3:2, the neuron is negatively charged. |
|
|
