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WorksheetsOCR Biology - Neuronal Coordination
Total questions: 17
Worksheet time: 11mins
What are the 3 things mammalian neurons have in common?
Cell Body, Myelin Sheath & Nucleus
Myelin Sheath, Nodes of Ranvier & Cell Body
Cell Body, dendrons & axons
Dendrons, axons & myelin sheath
True or False? Sensory neurons have one dendron that carries impulses to the cell body.
True
False
True or False? The cell body in a sensory neuron is found very close to the short dendron and it has a long axon
True
False
True or False? Motor neurons have one long axon but may have many dendrites
True
False
What are layers of myelin sheath made up of?
Plasma membranes
Schwann Cells
Schwan Cells
Specialised cells with voltage channels
What is the average speed for a myelinated neuron?
1 m/s
10 m/s
100 m/s
1000 m/s
Schwann cells are permeable to sodium and potassium ions. True or false?
True
False
What is the space between myelinated and non-myelinated sections of an axon called?
Nodes of Ravier
Nodes of Ranvier
Nodes of Ranier
Nodes of Raviuer
What is the term used to describe how the action potential moves along a myelinated axon?
Saltatory Propagation
Propagation
Salutatory Conduction
Saltatory Conduction
What is an energy transducer?
A receptor that sends a nerve impulse
A receptor that sends an action potential
A receptor that is adapted to detect changes
A receptor that converts one form of energy to another
What type of receptor is a Pacinian Corpuscle?
Thermoreceptor
Chemoreceptor
Photoreceptor
Mechanoreceptor
The bulbs of Krause are also known as:
Bulboid Corpuscles
Thermoreceptors
Mechanoreceptors
Wilhelm Corpuscles
What are the name of the channels in the Pacinian corpuscles?
Voltage gated sodium channel
Stretch mediated sodium channel
Ligated chanel
Sodium-Potassium Channel
In the pacinian corpuscles resting state the channel is too narrow to allow (a) to pass through.
When pressure is applied the corpuscle changes shape which causes the membrane to stretch. Sodium ions (a) into the neuron.
The influx of positive changes changes the potential of the membrane. It becomes (a)
This results in a generator potential being created. This initiates an (a) along the sensory neuron.
