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Nervous coordination
Class 12 · Biology · 8 questions
Name: ____________________ Date: ____________
The resting membrane potential of a neuron is about:
- A +30 mV
- B +70 mV
- C -70 mV
- D 0 mV
An impulse jumps from node to node along a myelinated axon. This is called:
- A Reflex
- B Saltatory conduction
- C Osmosis
- D Diffusion
The gap between two neurons is the:
- A Dendrite
- B Node
- C Synapse
- D Axon
Acetylcholine is a:
- A Hormone from the thyroid
- B Neurotransmitter
- C Vitamin
- D Enzyme
The part of the brain that controls heart rate and breathing is the:
- A Pituitary
- B Cerebellum
- C Cerebrum
- D Medulla oblongata
The part of a neuron that receives signals is the:
- A Myelin sheath
- B Dendrite
- C Axon
- D Synapse
The sheath around many axons that speeds impulses is made of:
- A Keratin
- B Cellulose
- C Myelin
- D Chitin
A reflex arc involves a sensory neuron, a relay neuron and a:
- A Motor neuron
- B Hormone
- C Muscle spindle only
- D Gland only
Answer key
1. C, 2. B, 3. C, 4. B, 5. D, 6. B, 7. C, 8. A
The inside is negative relative to the outside.
The impulse jumps between nodes of Ranvier.
Neurotransmitters cross the synapse.
It carries signals across many synapses.
The medulla controls involuntary vital functions.
Dendrites receive impulses.
Myelin insulates the axon.
The motor neuron carries the response.