EDT Neuroanatomy & Physiology 1 — Questions and Answers
Question 1: Which part of the brain is responsible for coordinating movement and balance?
- Cerebrum
- Medulla
- Cerebellum (Correct answer)
- Hypothalamus
Correct answer: Cerebellum
The cerebellum, located at the back of the brain, is primarily responsible for coordinating voluntary movements, maintaining posture, balance, and motor learning. It integrates sensory input from the spinal cord with motor commands from the cerebral cortex to fine-tune movements.
Question 2: What is the primary function of myelin in the nervous system?
- Produces neurotransmitters
- Acts as a receptor
- Insulates axons and speeds signal conduction (Correct answer)
- Connects neurons to muscles
Correct answer: Insulates axons and speeds signal conduction
Myelin is a fatty substance that forms a protective sheath around nerve fibers (axons). Its main function is to insulate the axon, preventing the dissipation of electrical signals and allowing nerve impulses to travel much faster along the axon through a process called saltatory conduction.
Question 3: Which part of the neuron receives incoming signals?
- Axon terminal
- Node of Ranvier
- Dendrite (Correct answer)
- Synaptic cleft
Correct answer: Dendrite
Dendrites are tree-like extensions of a neuron that receive chemical signals (neurotransmitters) from other neurons. They act as the primary input sites, converting these chemical signals into electrical impulses that are then transmitted towards the neuron's cell body.
Question 4: What role does the synapse play in neuronal communication?
- Generates impulses
- Stores myelin
- Facilitates signal transmission between neurons (Correct answer)
- Regulates oxygen supply
Correct answer: Facilitates signal transmission between neurons
A synapse is the specialized junction where one neuron communicates with another neuron or an effector cell. It involves the transmission of nerve impulses, typically via neurotransmitters, from the presynaptic neuron across the synaptic cleft to the postsynaptic neuron, allowing for complex neural networks.
Question 5: What is the function of the spinal cord in the nervous system?
- Controls blood pressure
- Processes visual input
- Transmits nerve impulses and mediates reflexes (Correct answer)
- Regulates hormone release
Correct answer: Transmits nerve impulses and mediates reflexes
The spinal cord serves as the main pathway for information transmission between the brain and the rest of the body. It carries motor commands from the brain to muscles and sensory information from the body to the brain, and it also independently mediates rapid, involuntary reflex actions.
Question 6: Which division of the nervous system controls involuntary body functions?
- Somatic nervous system
- Central nervous system
- Autonomic nervous system (Correct answer)
- Peripheral sensory nerves
Correct answer: Autonomic nervous system
The autonomic nervous system (ANS) is a division of the peripheral nervous system that controls involuntary bodily functions such as heart rate, digestion, respiration, and blood pressure. It operates without conscious thought, regulating internal organs and glands to maintain homeostasis.
EDT Neuroanatomy & Physiology 1
Which part of the brain is responsible for coordinating movement and balance?