The Nervous System Quiz
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5 questions, one answer each
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1. Which of the following correctly describes the role of the peripheral nervous system?
- A. It consists of the brain and spinal cord only
- B. It carries nerve impulses between the CNS and the rest of the body
- C. It is responsible for all voluntary responses in the body
- D. It processes all sensory information before sending it to the brain
2. A student touches a hot surface and quickly pulls their hand away. Which statement correctly explains why this response occurs faster than a conscious decision would allow?
- A. The relay neurone sends the signal directly to the brain before the motor neurone responds
- B. A reflex arc allows the motor neurone to be stimulated by the relay neurone without the signal reaching the brain first
- C. The sensory neurone is connected directly to the effector muscle
- D. The brain processes the signal immediately and sends a faster response than normal
3. Which of the following is a key structural feature of a synapse that enables the transmission of nerve impulses?
- A. A direct electrical connection between the axon of one neurone and the dendrite of the next
- B. A gap between neurones where neurotransmitters are released from the presynaptic membrane and bind to receptors on the postsynaptic membrane
- C. A myelin sheath that insulates the gap between two neurones
- D. A continuous cytoplasm bridge that allows ions to flow directly from one neurone to another
4. A patient suffers damage to their motor cortex following a stroke. Which of the following would be the most likely consequence?
- A. Loss of sensory perception because the motor cortex processes sensory information
- B. Inability to carry out voluntary movements in the body parts controlled by the damaged region
- C. Loss of memory because the motor cortex stores long-term memories
- D. Inability to reflex because the motor cortex controls all reflex actions
5. Why is studying the brain considered particularly difficult, and what advantage do modern scanning techniques like MRI have in addressing this challenge?
- A. The brain is too small to study; MRI magnifies the brain tissue so it can be seen clearly
- B. The brain is protected by the skull and is very complex; MRI allows non-invasive imaging of brain structure without surgery or harmful radiation
- C. The brain works too quickly to study; MRI slows down brain activity so changes can be observed
- D. Brain cells die quickly in laboratories; MRI allows researchers to study living brains in real time without any limitations