Neuroscience Quiz

If the myelin sheath of a neuron is damaged, what will most likely happen?

• The neuron will generate impulses more quickly

• Impulses will travel faster than normal

• Impulse transmission will slow down or be blocked

• Neurotransmitter release will increase

A person’s cerebellum is injured. Which activity will likely be most affected?

• Speaking clearly

• Digesting food

• Maintaining balance while walking

• Remembering past events

Which of the following best describes a synapse?

• A space where myelin is absent

• A junction where one neuron stimulates another

• A gap between muscles and nerves only

• The site of impulse generation in the axon

Which one of these actions involves a reflex arc?

• Typing on a keyboard

• Blinking when dust enters the eye

• Answering a question in class

• Choosing a book to read

Which of these changes will increase the speed of impulse transmission along a neuron?

• Longer axon length

• Increased neurotransmitter production

• Thicker myelin sheath

• More dendrites

In a reflex arc, what is the correct order of components?

• Effector → Sensory neuron → Spinal cord → Motor neuron → Receptor

• Receptor → Motor neuron → Sensory neuron → Effector

• Receptor → Sensory neuron → Spinal cord → Motor neuron → Effector

• Stimulus → Brain → Spinal cord → Effector

The speed of impulse conduction is faster in:

• Sensory neuron without myelin

• Unmyelinated motor neuron

• Myelinated sensory neuron

• Interneuron in the spinal cord

What will happen if acetylcholine is not released at the synapse?

• The impulse will travel faster

• The next neuron will not be stimulated

• The muscle will contract continuously

• The dendrites will detach

Which part of the brain plays a dual role in maintaining body temperature and hormonal regulation?

• Cerebellum

• Cerebrum

• Hypothalamus

• Medulla

Which of the following explains the advantage of reflex action?

• It is controlled by the brain, so it is accurate

• It allows voluntary response to danger

• It prevents harm through fast, involuntary response

• It helps in decision-making