BIO 181 ASU Module 13 Exam Questions 2024 Marking Scheme

BIO 181 ASU Module 13 Exam Questions 2024 Marking Scheme What are the 3 levels are the nervous system? - Answer -Nerve Net, Ganglia, brain What is the cell body? - Answer -The portion of the neuron containing the nucleus What does the CNS consist of? - Answer -The brain and Spinal Cord What does the PNS consist of? - Answer -Neurons and supporting cells outside of the CNS What is the axon? what does it do? - Answer -The cell portion of the neuron; it carries info away from the cell body to target cells (other neurons, muscle cells or gland cells) What are the fine nerve endings at the end of the axon called? - Answer -Synapses What is at the tip of each synapse? - Answer -Axon terminals What do axon terminals do? - Answer -Helps release neurotransmitters Draw a picture of a basic neuron (include the axon hillock, axon terminal, axon, dendrites, and synapses) - Answer - What is a fast synapse? - Answer -Recepter ion channels that open very quickly (ionotropic receptors) What is a slow synapse? - Answer -Require a chemical cascade via cytoplasmic signal to open (metabotrophic receptors. Processes of metabolism) What are gap junctions? - Answer -Electrical synapses that open incredibly fast. The fastest possible option Where are messages exchanged? - Answer -At the synapse What is the presynaptic cell? - Answer -The cell that sends the message What is the post synaptic cell? - Answer -The cell that receives the message What is the most common type of synapse? - Answer -The chemical synapse, but it is not the fastest What is an excitatory synapse? - Answer -If it depolarizes in response to chemical stimulation (ie let's positive ions in) What's an inhibitory synapse? - Answer -Hyper polarizes when stimulated What is the resting potential of a membrane? - Answer --60 mV