Human Physiology - Neural Control

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Q1. Which part of the nervous system is responsible for the 'fight or flight' response? (2023)

Solution:

The sympathetic nervous system is responsible for the 'fight or flight' response, preparing the body for action.

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Q2. What is the function of the blood-brain barrier? (2022)

Solution:

The blood-brain barrier protects the brain from harmful substances while allowing essential nutrients to pass through.

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Q3. Which structure in the neuron is responsible for the generation of action potentials? (2019)

Solution:

The axon hillock is the part of the neuron where action potentials are generated.

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Q4. Which type of neuron carries signals away from the central nervous system? (2021)

Solution:

Motor neurons carry signals away from the central nervous system to muscles and glands.

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Q5. Which part of the neuron receives signals from other neurons? (2020)

Solution:

Dendrites are the parts of the neuron that receive signals from other neurons.

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Q6. What is the primary role of the spinal cord in the nervous system? (2022)

Solution:

The spinal cord transmits signals between the brain and the rest of the body, playing a crucial role in reflex actions.

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Q7. Which part of the neuron transmits impulses away from the cell body? (2023)

Solution:

The axon is the part of the neuron that transmits impulses away from the cell body to other neurons or muscles.

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Q8. Which ion is primarily responsible for the depolarization phase of an action potential? (2023)

Solution:

Sodium ions (Na+) rush into the neuron during depolarization, causing the membrane potential to become more positive.

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Q9. Which structure in the neuron is responsible for transmitting impulses away from the cell body? (2019)

Solution:

The axon is the part of the neuron that transmits impulses away from the cell body.

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Q10. Which part of the neuron is responsible for transmitting impulses away from the cell body? (2023)

Solution:

The axon is the long projection of a neuron that transmits impulses away from the cell body.