ATI RN
Test Questions on Autonomic Nervous System Questions
Question 1 of 5
The hypothalamus plays a crucial role in:
Correct Answer: A
Rationale: The hypothalamus regulates homeostasis (temperature, hunger, thirst).
Question 2 of 5
Which of the following is a regulatory protein in the cytoplasm that helps the processes at the synapse?
Correct Answer: A
Rationale: Calmodulin binds calcium to regulate synaptic processes (e.g., neurotransmitter release). Protein kinase phosphorylates, ligands bind receptors, and 'gap protein' is vague (likely gap junctions, unrelated).
Question 3 of 5
Excessive polarization due to GABA is created due to the opening of channels.
Correct Answer: B
Rationale: GABA opens Cl- channels, causing hyperpolarization (inhibition) by Cl- influx. Ca++, K+, and Na+ are involved in other processes.
Question 4 of 5
The progression of a nerve impulse with the nodes of Ranvier is called:
Correct Answer: A
Rationale: Saltatory conduction is impulse jumping between nodes of Ranvier in myelinated axons, speeding transmission. Others are incorrect or vague.
Question 5 of 5
It is a type of nerve cell that protects CNS from infection and becomes phagocytic in response to inflammation:
Correct Answer: C
Rationale: Microglia are CNS immune cells that phagocytose debris and pathogens during inflammation. Schwann cells myelinate PNS axons, ependymal cells produce CSF, and astrocytes support the BBB.