BIOL 2024 Nervous System Exam Correctly Answered.

BIOL 2024 Nervous System Exam Correctly Answered. Label the parts of a typical multipolar neuron. - CORRECT ANSWER An action potential traveling down the presynaptic neuron reaches the synaptic knob. What initially occurs at the synaptic knob when that action potential arrives? - CORRECT ANSWER Voltage-gated calcium ion channels open, and calcium ions diffuse into the synaptic knob. What happens next, after an action potential arrives at a synaptic knob, opening calcium channels and allowing calcium to enter the cell? - CORRECT ANSWER Synaptic vesicles migrate to the plasma membrane and release acetylcholine. Describe the effect of acetylcholine on the postsynaptic neuron. - CORRECT ANSWER Ligand (chemically)-gated sodium channels open, and sodium diffuses into the postsynaptic neuron. If the postsynaptic membrane potential reaches threshold level, an action potential will be produced. - CORRECT ANSWER True Acetylcholine is actively transported across the synaptic cleft. - CORRECT ANSWER False During an action potential, what change occurs at the cell membrane? - CORRECT ANSWER The area inside the neuron cell membrane becomes positively charged compared to the outside. An action potential generates local currents that cause _____ of the membrane immediately adjacent to the action potential. - CORRECT ANSWER depolarization The occurrence of the refractory period allows an action potential to propagate in both directions along the axon. - CORRECT ANSWER False Match the description with each functional aspect of the nervous system: Response - CORRECT ANSWER Motor function Match the description with each functional aspect of the nervous system: Decides response - CORRECT ANSWER Sensory function Match the description with each functional aspect of the nervous system: Detects stimulus/informs CNS - CORRECT ANSWER Integrative function Complete the sentences describing the functioning of the nervous system, then place them in logical order. - CORRECT ANSWER Label the features indicated in the image. - CORRECT ANSWER Label the parts of the nervous system. - CORRECT ANSWER Label the parts of the nervous system. Use each label twice. - CORRECT ANSWER Each label describes either dendrites or axons. Drop each label into the correct box. - CORRECT ANSWER Match each description with the correct part of a neuron: Rough endoplasmic reticulum with neuron cell body - CORRECT ANSWER Chromatophilic substance Match each description with the correct part of a neuron: Release neurotransmitter molecules - CORRECT ANSWER Synaptic knobs Match each description with the correct part of a neuron: Branches of an axon - CORRECT ANSWER Collaterals Match each description with the correct part of a neuron: Provide support for axon hillock and axon - CORRECT ANSWER Neurofibrils