Which of the following accurately describes white matter?
Correct answer: D. White matter consists of myelinated axons in the central nervous system
- A. White matter is denser than gray matter
- B. White matter is located in the central part of the spinal cord and is surrounded by gray matter
- C. White matter is only found in the peripheral nervous system
- D. White matter consists of myelinated axons in the central nervous system
Explanation
White matter refers to the white-colored myelin that surrounds the axons of neurons in the central nervous system. These axons are grouped together, creating distinct regions of white matter. In contrast, grey matter refers to the cell bodies of neurons in the central nervous system. The cell bodies are packed together into dense regions to create grey matter.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Chemical Coordination and Hormones
Chemical coordination uses hormones released by endocrine glands and carried in blood to specific target cells. Coverage includes the pituitary, thyroid, pancreas, adrenal glands, ovaries and testes, feedback control, and the contrast between slower, longer-lasting hormonal responses and rapid nervous coordination.
Practise Coordination and Control
1,687 free Coordination and Control MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Biology questions like this
Biology is on 8 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Chemical Coordination and Hormones questions
A lesion to which brain region would result in a lack of coordinated movement?
Which part of the brain is responsible for controlling body temperature, and adjusting to external temperature conditions?
The central nervous system consists of the brain and the spinal cord. In general, tracts allow for the brain to communicate up and down with the spinal cord. The commissures allow for the two hemispheres of the brain to communicate with each other. One of the most important commissures is the corpus callosum. The association fibers allow for the anterior regions of the brain to communicate with the posterior regions. One of the evolved routes from the spinal cord to the brain is via the dorsal column pathway. This route allows for fine touch, vibration, proprioception and 2 points discrimination. This pathway is much faster than the pain route. From the lower limbs, the signal ascends to the brain via a region called the gracile fasciculus. From the upper limbs, the signal ascends via the cuneate fasciculus region in the spinal cord.Patient A has a tumor in his spinal cord. He is able to feel a fine touch above the waist. Below the waist he is unable to feel fine touch on either side. Where is the tumor most likely located? I. All levels of the spinal cordII. In the gracile fasciculus regionIII. In the cuneate fasciculus region
Which is the correct order of sequences during the knee-jerk reflex?
Color blindness could be a result of the dysfunction of which type of cell?
Which of the following somatic sensory neurons is responsible for the perception of pain?