Neuroscience Concepts and Functions

Mr. X introduces a vocabulary activity focused on the nervous system. The video covers afferent and efferent nerves, somatic and autonomic systems, and various nervous system cells like astrocytes and microglia. It also explains neuron structure, nerve impulses, and reflexes, providing a comprehensive overview of the nervous system.

What is the primary function of afferent nerves?

• To form a protective covering around the spinal cord

• To transmit impulses from the central nervous system to muscles

• To carry impulses from sensory receptors to the central nervous system

• To link capillaries to neurons

Which type of neurons are responsible for carrying impulses from the central nervous system to muscles and glands?

• Microglia

• Efferent neurons

• Afferent neurons

• Astrocytes

What does the somatic nervous system primarily control?

• Involuntary actions of internal organs

• Voluntary movements of skeletal muscles

• Nutrient supply to neurons

• Waste disposal in the nervous system

Which system is responsible for controlling involuntary actions such as heartbeats and digestion?

• Autonomic nervous system

• Peripheral nervous system

• Somatic nervous system

• Central nervous system

What role do astrocytes play in the nervous system?

• They link capillaries to neurons and protect them from harmful substances

• They produce myelin sheaths around nerve fibers

• They absorb and dispose of dead cells

• They form a protective covering around the spinal cord

Which cells are responsible for forming a protective covering around the spinal cord?

• Astrocytes

• Ependymal cells

• Oligodendrocytes

• Microglia

What is the function of Schwann cells?

• To form a protective covering around the brain

• To absorb dead cells and bacteria

• To link capillaries to neurons

• To produce myelin sheaths around nerve fibers in the peripheral nervous system

What is the role of dendrites in a neuron?

• To transmit impulses away from the cell body

• To form synapses with other neurons

• To collect and transport signals to the cell body

• To insulate the axon

What is a synapse?

• A protective cell in the nervous system

• A type of nerve impulse

• A junction between two nerve cells

• A gap between Schwann cells

What is the refractory period in a neuron?

• The time when a neuron is actively transmitting an impulse

• The time when a neuron is forming new synapses

• The time when a neuron is absorbing nutrients

• The time when a neuron is temporarily unable to fire again