Nervous System Quiz

What are the two main components of the central nervous system (CNS)?

• Brain and spinal cord

• Heart and lungs

• Stomach and intestines

• Muscles and bones

What is the primary function of afferent fibers in the nervous system?

• Conduct information toward the CNS

• Transmit signals away from the CNS

• Control muscle movements

• Regulate blood pressure

Which division of the peripheral nervous system is responsible for sensory input?

• Afferent division

• Efferent division

• Autonomic division

• Somatic division

What are the two subdivisions of the motor portion of the PNS?

• Somatic motor division and autonomic motor division

• Central motor division and peripheral motor division

• Voluntary motor division and involuntary motor division

• Sensory motor division and integrative motor division

What are the three main parts of a neuron?

• Cell body, axon, and synapse

• Cell body, dendrites, and axon

• Dendrites, axon, and synapse

• Nucleus, axon, and dendrites

What is the function of dendrites in a neuron?

• To transmit impulses away from the cell body

• To serve as a receptive area for electrical impulses

• To store neurotransmitters

• To protect the neuron from damage

What is the role of axons in neurons?

• To receive signals from other neurons

• To carry electrical messages away from the cell body

• To process sensory information

• To store genetic information

Why is myelin important?

• It increases the diameter of axons.

• It forms a continuous sheath around axons.

• It accelerates the speed of transmission in neurons.

• It decreases the speed of neural transmission.

What are the key ions involved in neuronal communication?

• Sodium (Na+), potassium (K+), calcium (Ca2+), and chloride (Cl-)

• Magnesium (Mg2+), iron (Fe2+), zinc (Zn2+), and copper (Cu2+)

• Hydrogen (H+), oxygen (O2-), nitrogen (N3-), and sulfur (S2-)

• Carbon (C4+), helium (He), neon (Ne), and argon (Ar)

What is the typical resting membrane potential of a neuron?

• -70 mV

• -50 mV

• -90 mV

• -30 mV