10 Questions
Which part of the nervous system responds to stimuli from the external or internal environment?
Afferent Division
What is the term for the process by which a stimulus is converted into an electrical signal in a sensory receptor?
Receptor potential
How is stimulus intensity (strength) distinguished in the coding of sensory stimuli?
By the frequency of action potentials generated
What causes the opening of voltage-gated Na+ channels leading to an action potential?
Stronger stimulus triggering larger receptor potential
What is the role of interneurons in the activation of motor neurons?
Stimulate motor neurons that carry action potentials to periphery
Which of the following is NOT a function of the dorsal horns of the gray matter in the spinal cord?
Transmitting efferent motor signals to skeletal muscles
Which of the following statements about the lateral horns of the gray matter is INCORRECT?
They are found throughout the entire length of the spinal cord
Which of the following statements about the white matter of the spinal cord is CORRECT?
It is grouped into three columns on each side of the spinal cord
Which of the following statements about the ascending tracts in the spinal cord is INCORRECT?
They relay messages from the brain to the spinal cord
Which of the following is NOT a component of a reflex arc?
Effector organ (muscle or gland)
Explore the structure and function of the gray matter in the spinal cord, including the dorsal, ventral, and lateral horns. Learn about the different types of neurons and nuclei found in each horn, and their roles in somatic and autonomic functions.
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