Peripheral Nervous System

What can happen to the brain without a constant flow of external information?

• It becomes more efficient at processing internal thoughts.

• It starts to confuse its own thoughts for actual experiences, leading to hallucinations.

• It enters a state of deep relaxation and meditation.

• It develops new sensory receptors to compensate for the lack of input.

What is the primary function of the peripheral nervous system?

• To process complex thoughts and emotions.

• To connect the brain to the physical environment and allow it to respond.

• To control involuntary bodily functions like digestion.

• To store memories and facilitate learning.

Which type of sensory receptor is responsible for detecting changes in temperature?

• Photoreceptors

• Chemoreceptors

• Mechanoreceptors

• Thermoreceptors

What is the specific function of nociceptors in the body?

• To detect light and color.

• To respond to pressure, touch, and vibration.

• To fire only to indicate pain.

• To sense chemical changes in the environment.

Why is the sensation of physical pain considered useful for the body?

• It enhances the body's ability to perform complex tasks.

• It helps protect the body from stress, damage, or danger.

• It is a necessary component for muscle growth and development.

• It improves cognitive function and memory recall.

What is a potential danger for individuals who cannot feel pain?

• They are more prone to emotional distress.

• They may not notice severe injuries like broken bones or burns.

• They experience heightened sensitivity to other senses.

• They have difficulty forming social connections.

What is the correct order of events when a pain signal is processed in the body?

• Brain -> Spinal Cord -> Receptors -> Stimulus

• Stimulus -> Receptors -> Spinal Cord -> Brain

• Receptors -> Brain -> Spinal Cord -> Stimulus

• Spinal Cord -> Stimulus -> Receptors -> Brain

What is the difference between pain threshold and pain tolerance?

• Pain threshold is subjective, while pain tolerance is objective.

• Pain threshold is the point where a stimulus triggers action potentials, while pain tolerance is the perception of pain.

• Pain threshold varies greatly among individuals, while pain tolerance is constant.

• Pain threshold is a psychological response, while pain tolerance is a physiological response.

What is the electrical event that sends a signal along a neuron?

• Repolarization

• Hyperpolarization

• Depolarization

• Resting potential

How is an electrical signal converted to a chemical signal to cross a synaptic gap between neurons?

• By activating neurotransmitters

• By increasing membrane potential

• By closing ion channels

• By stimulating muscle fibers