Unit 3 Concept 1 Nervous System Review

What is the ultimate control center of the body that oversees all communication among the organ systems?

• The heart

• The liver

• The brain

• The lungs

What is the role of sensory input in the body's control system?

• It activates effector organs to cause a response

• It processes the input stimuli and decides what should be done

• It receives stimuli via millions of sensory receptors throughout the body

• It oversees all communication among the organ systems

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What does integration refer to in the context of the body's control system?

• The activation of effector organs to cause a response

• The reception of stimuli via sensory receptors

• The processing of input stimuli and making decisions on what should be done

• The communication between different organ systems

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What is the function of motor output in the body's control system?

• It receives stimuli from the environment

• It processes stimuli and makes decisions

• It oversees communication among organs

• It activates effector organs to cause a response

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What is the primary function of neurons in nervous tissue?

• To provide nutrition and insulation

• To respond to stimuli by conducting impulses to transmit signals

• To support other cells without transmitting signals

• To form the physical structure of the nervous system

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What role do neuroglia (glial cells) play in the nervous system?

• They conduct impulses to transmit signals

• They are excitable cells that respond to stimuli

• They provide nutrition, insulation, and help with signal transmission

• They are the primary cells responsible for transmitting signals

Nervous tissue is composed of which two main types of cells?

• Astrocytes and oligodendrocytes

• Neurons and neuroglia

• Schwann cells and microglia

• Red blood cells and white blood cells

What are the dendrites of a neuron?

• Branched projections of a neuron that receive signals from other neurons.
• Circular projections of a neuron that regulate body temperature.
• Short projections of a neuron that store energy for the cell.
• Long projections of a neuron that transmit signals to other neurons.

What is the function of axon terminals in a neuron?

• To receive neurotransmitters from other neurons

• To release neurotransmitters at a synapse when a nerve impulse is received

• To protect and electrically insulate the axon

• To increase the velocity of nerve signal conduction

What is the role of the myelin sheath in a neuron?

• To cover dendrites and increase the speed of nerve impulse transmission

• To release neurotransmitters at the synapse

• To cover long axons and electrically insulate them to increase the speed of nerve impulse transmission

• To create unmyelinated gaps in the axon