Quiz on the Central Nervous System

What does the central nervous system (CNS) include?

• Brain and spinal cord

• 12 pairs of cranial nerves

• All ganglia

• 31 pairs of spinal nerves

Which of the following is NOT a protective structure of the CNS?

• Cerebrospinal fluid

• Meninges

• Vertebral column

• Nerve fibers

What type of information does the afferent branch of the peripheral nervous system carry?

• Reflex actions

• Autonomic functions

• Sensory information to the CNS

• Motor signals to muscles

Which part of the brain is responsible for coordinating voluntary movements?

• Brainstem

• Hypothalamus

• Cerebellum

• Thalamus

What is the primary function of astrocytes in the CNS?

• Act as phagocytes

• Support neurons and regulate blood flow

• Transmit nerve impulses

• Form myelin sheath

Which type of glial cell is responsible for myelination in the CNS?

• Microglia

• Astrocytes

• Ependymal cells

• Oligodendrocytes

What is the role of the blood-brain barrier?

• To facilitate the flow of cerebrospinal fluid

• To protect the brain from harmful substances

• To connect the brain to the spinal cord

• To allow all substances to enter the brain

Which of the following is a function of the autonomic nervous system?

• Voluntary muscle control

• Regulation of heart rate

• Sensory perception

• Cognitive functions

What type of receptors are responsible for detecting changes in muscle tension?

• Pacinian corpuscles

• Muscle spindles

• Meissner's corpuscles

• Merkel's discs

Which cranial nerve is responsible for the sense of smell?

• Facial nerve

• Trigeminal nerve

• Olfactory nerve

• Optic nerve