Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
8 Cards in this Set
- Front
- Back
|
WHAT IS THE NERVOUS SYSTEM? |
THE NERVOUS SYSTEM IS A COMPLEX COLLECTION OF NERVES AND SPECIALIZED CELLS, KNOWN AS NEURONS, THAT TRANSMIT SIGNALS BETWEEN DIFFERENT PARTS OF THE BODY. IT IS THE BODY'S ELECTRICAL WIRING. |
|
|
WHAT ARE THE MAIN PARTS OF NERVOUS SYSTEM? |
CENTRAL NERVOUS SYSTEM (CNS) - BRAIN AND THE SPINAL CHORD. PERIPHERAL NERVOUS SYSTEM (PNS) - NERVES AND RECEPTOR CELLS |
|
|
WHAT ARE THE TYPES OF NEURONS? |
THERE ARE 2 TYPES OF NEURONS: - SENSORY NEURONS - MOTOR NEURONS |
|
|
WHAT ARE THE 2 MAIN SUBDIVISIONS OF THE NERVOUS SYSTEM? |
SOMATIC (VOLUNTARY) COMPONENT, WHICH CONSISTS OF NERVES CONNECTING THE BRAIN AND THE SPINAL CHORD WITH MUSCLES AND SENSORY RECEPTORS IN THE SKIN. AUTONOMIC (INVOLUNTARY) COMPONENT WHICH REGULATES CERTAIN BODY PROCESSES, SUCH AS BLOOD PRESSURE AND THE RATE OF BREATHING. |
|
|
WHAT IS THE FUNCTION OF EACH OF TYPE OF NEURONS? |
SENSORY NEURONS CARRY THE IMPULSE FROM A RECEPTOR TO THE CNS. MOTOR NEURONS CARRY THE IMPULSE FROM THE CNS TO A MUSCLE OR A GLAND. |
|
|
WHAT IS THE NERVE MADE UP OF? |
THE NERVE IS MADE UP OF A CELL BODY THAT CONTAINS NUCLEUS AND A LONG FIBRE CALLED AN AXON. IT IS COVERED WITH MYELIN SHEATH, WHICH ACTS AS AN INSULATION FOR THE NERVE. |
|
|
WHAT ARE DENDRITES? |
DENDRITE (COME FROM GREEK "DENDRON", MEANING "TREE") IS A BRANCHED EXTENSION OF THE BODY OF THE CELL. THEY ARE VERY IMPORTANT AS THEY INTERCONNECT WITH OTHER NEURONS TO PASS THE NERVE IMPULSE FROM ONE NEURON TO ANOTHER. |
|
|
WHAT IS SYNAPSE AND WHAT IS ITS FUNCTION? |
IT IS A JUNCTION BETWEEN 2 NERVE CELLS, CONSISTING OF A MINUTE GAP ACROSS WHICH THE IMPULSES PASS. THE STIMULATED NEURON RELEASES A CHEMICAL THAT CROSSES THE GAP AND STIMULATES THE OTHER NEURON. |
