Nervous system 🙀 Flashcards
Term that describes the region where two neurons come into close contact
Synapse
Name given to the gap between two neurons
Synaptic cleft
Describe how nerve impulses travel between two neurons in close contact
Impulse arrives,
neurotransmitter released, enzymes break down neurotransmitter
Names of three types of neuron found in the human nervous system
Sensory, motor, interneuron
One possible treatment for Parkinson’s or paralysis
Physiotherapy or surgery
Two parts of the human nervous system
CNS, PNS
Distinguish between the function of an interneuron and a sensory neuron
Interneurons transmit impulses within CNS,
Sensory Neurons transmits impulses to CNS
How is a nerve impulses conducted along a neuron
Movement of ions
One cause of paralysis
Injury to spinal cord
One cause of Parkinsons
Decrease in serotonin and dopamine levels
What is a reflex action
Automatic response to a stimulus
Two Examples of reflex action in the human body
Blinking, Iris response
Two advantages of a reflex action
Protection, fast
Describe how a reflex action works
Stimulus detected by receptor,
Impulse set up at receptor,
Impulse sent along sensory neuron,
To the effector,
Effector reacts
Two ways in which a nervous response differs from a hormonal response
Nervous response is fast and hormonal response is slow,
Nervous response is electrical hormonal response is chemical
Substance released by dendrites
Neurotransmitter
Substance produces by Schwann cell
Myelin
Function of myelin
To speed up the impulse
Role of dendrites
Receive impulses
Role of axon
carries impulses away from cell body
Role of cell body
Receive impulses
How nerve impulses are transmitted across a synaptic cleft
Impulse arrives,
Neurotransmitter is released into synapse,
Enzymes break down neurotransmitter
Function of meninges
Protection of CNS
How many layers are present in the meninges
Three
Name type of Particle who’s movement in and out of neurons is an essential feature of nerve impulse transmission
Ion
Position of cerebellum in human brain
Hind brain
Position of cerebrum in human brain
Forebrain
Four functions of the cerebrum
Memory, learning, language, personality
Function of the Medulla Oblongata
Controls involuntary actions
Function of the cerebellum
Controls coordination
Why is the grey matter so called
Composed of cell bodies
Why is white matter so called
Composed of Myelin or axons
What is meant by term “endocrine”
Ductless
Hormone secreted by the pituitary gland
ADH
Function of ADH
Regulates the amount of water in the body
One gland with endocrine and exocrine functions
Pancreas
Distinguish between central Nervous system and Peripheral a nervous system
CNS: brain and Spinal Cord.
PNS: nerves leading to and from CNS.
Distinguish between sensory, motor and interneurons
Sensory: towards CNS.
motor: away from CNS.
Inter: links two neurons
Possible role for a drug in relation to the events of the transmission of an impulse
To enhance transmission of impulse
