1) Which of the following is a sensory neuron’s main function? a) Connect other neurons in the brain and spinal cord b) Carry signals from muscles to the brain c) Carry information from sensory receptors to the CNS d) Release hormones into the bloodstream 2) What is the primary role of interneurons? a) Detect stimuli such as light and sound b) Connect sensory and motor neurons within the CNS c) Cause muscles to contract d) Produce myelin 3) Motor neurons function to: a) Carry impulses toward the CNS b) Connect nerve cells in the brain c) Carry signals from the CNS to muscles and glands d) Sense changes in the environment 4) Which neuron structure receives incoming signals? a) Axon b) Dendrite c) Axon terminal d) Node of Ranvier 5) The myelin sheath is produced by which type of cell in the peripheral nervous system? a) Astrocyte b) Ependymal cell c) Schwann cell d) Microglial cell 6) What is the main function of the myelin sheath? a) Store neurotransmitters b) Speed up nerve impulse conduction c) Create action potentials d) Detect sensory information 7) The gaps between myelin segments on an axon are called: a) Dendrites b) Axon terminals c) Nodes of Ranvier d) Synapses 8) Nerve transmission refers to: a) The release of hormones by glands b) The movement of electrical and chemical signals along a neuron c) The digestion of neurotransmitters d) The storage of ions inside the nucleus 9) Which ions play the most important role in generating an action potential? a) Calcium and chloride b) Sodium and potassium c) Iron and iodine d) Hydrogen and oxygen 10) An action potential is best described as: a) A slow buildup of chemicals inside the cell b) A rapid electrical change along the neuron’s membrane c) A release of neurotransmitters into the bloodstream d) A type of hormone released by glands 11) Saltatory conduction refers to: a) A reflex pathway through the spinal cord b) Neurotransmitter release c) Ions leaking across myelin d) Action potentials jumping between Nodes of Ranvier 12) Schwann cells help saltatory conduction by: a) Producing neurotransmitters b) Creating synaptic vesicles c) Forming the myelin sheath d) Reabsorbing ions 13) Synaptic transmission occurs when: a) A neuron absorbs sodium ions b) Neurotransmitters cross the synaptic cleft c) The myelin sheath thickens d) A reflex arc is activated 14) A spinal reflex is best described as: a) A voluntary movement controlled by the brain b) A slow response involving multiple neurons in the cerebrum c) A fast, automatic response controlled by the spinal cord d) A chemical secretion by the glands 15) Which of the following is an example of a spinal reflex? a) Writing your name b) Solving a math problem c) Pulling your hand away from a hot stove d) Deciding to stand up

Nervous system and Synapse

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