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18 Cards in this Set
- Front
- Back
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WHAT IS THE REFLEX ACTION? |
IT IS A RAPID AUTOMATIC RESPONSE TO A DANGEROUS STIMULUS AND IS UNDER THE CONTROL OF CNS. A REFLEX ACTION DOES NOT REQUIRE WILL. ALL REFLEX ACTIONS ARE DESIGNED TO KEEP A PERSON OR AN ANIMAL SAFE. FOR EXAMPLE: BLINKING OF EYES, COUGHING, SNEEZING, ETC. |
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HOW DO PLANTS REACT TO STIMULI? |
PLANTS DO NOT HAVE REFLEXES, BUT THEY DO RESPOND TO STIMULI, SUCH AS LIGHT AND GRAVITY. Eg. SUNFLOWER TRACKS THE SUN DURING DAY TIME. |
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DIFFERENCE BETWEEN SENSORY NEURON AND MOTOR NEURON. |
SENSORY NEURON HAS SHORT AXON. IT CARRIES A PULSE FROM SENSE ORGAN TO THE BRAIN. MOTOR NEURON HAS A LONG AXON. IT CARRIES A PULSE FROM BRAIN TO A SENSE ORGAN. |
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WHAT IS A REFLEX ARC? |
IT IS A NEURAL PATHWAY THAT CONTROLS A REFLEX ACTION. IT INCLUDES A SENSORY NEURON, A RELAY NEURON AND A MOTOR NEURON. WHEN IN DANGER, THE SIGNALS CAN BE PASSED FROM A SENSORY NEURON DIRECTLY TO THE MOTOR NEURON, VIA A RELAY NEURON, WITHOUT THE DELAY OF ROUTING THROUGH THE BRAIN. |
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WHAT IS THE FUNCTION OF A RELAY NEURON? |
RELAY NEURONS CARRY MESSAGES FROM ONE PART OF CNS TO ANOTHER. WHEN THE SAFETY OF AN ORGANISM IS COMPROMISED, RELAY NEURON RECEIVES THE SIGNAL FROM A SENSORY NEURON, TRANSMITS IT TO THE MOTOR NEURON AND THE BRAIN AT THE SAME TIME, WHILE THE MUSCLE RESPONDS TO THE STIMULUS. |
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WHICH 2 SYSTEMS ALLOW YOU TO DETECT CHANGES AND RESPOND TO THEM? |
NERVOUS SYSTEM AND HORMONAL SYSTEM. |
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WHAT IS A STIMULUS? |
IT IS A CHANGE THAT CAN BE DETECTED. |
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WHAT IS THE CHAIN OF EVENTS THAT HAPPEN WHEN A RECEPTOR DETECTS A STIMULUS? |
STIMULUS-----RECEPTOR------COORDINATOR--- -------EFFECTOR-------RESPONSE |
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WHAT ARE THE NERVE IMPULSES? |
ELECTRICAL SIGNALS THAT PASS ALONG NERVE PATHWAYS MADE UP OF NEURONS. |
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WHAT IS A SYNAPSE? |
A SMALL GAP BETWEEN NEURONS WHICH A CHEMICAL PASSES TO TRANSMIT AN IMPULSE |
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NAME THE 3 IMPORTANT PARTS OF OUR BRAIN |
CEREBRAL HEMISPHERES MEDULLA CEREBELLUM |
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WHAT ARE THE 5 SENSES? |
TOUCH TASTE SMELL HEARING SIGHT |
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WHAT ARE THE SENSORS IN OUR SKIN RESPOND TO? |
THEY RESPOND TO: - PRESSURE - TEXTURE - PAIN - TEMPERATURE |
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WHAT ARE EAR OSSICLES? |
THEY ARE THE 3 TINIEST BONES THAT TRANSMIT THE ACOUSTIC TRANSMISSION FROM THE EARDRUM ONTO THE OVAL WINDOW. |
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WHAT HELPS US KEEP OUR BALANCE? |
THE SEMI-CIRCULAR CANALS (A SET OF 3 TUBES) IN EACH EAR, WHICH SENSE WHEN WE MOVE OUR HEAD AROUND AND HELP USE KEEP OUR VISION CLEAR. |
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WHAT STRUCTURES FOCUS THE LIGHT RAYS ONTO THE RETINA? |
THE CORNEA AND LENS. |
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WHAT HAPPENS TO OUR CILIARY MUSCLES, SUSPENSORY LIGAMENTS AND LENS WHEN WE VIEW A NEAR OBJECT? |
- THE CILIARY MUSCLES CONTRACT - THE SUSPENSORY LIGAMENTS SLACKEN - THE LENS GET FATTER |
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WHAT ARE THE FUNCTIONS OF RODS AND CONES IN THE RETINA? |
THE RODS WORK IN DIM LIGHTS AND THE CONES DETECT COLOR AND DETAILS. |
