Which of the following best describes a difference between upper motor neurons (UMNs) and lower motor neurons (LMNs)?
A. UMNs are located in the spinal cord, while LMNs are located in the brain.
B. UMNs transmit motor signals from the brain to the spinal cord, while LMNs transmit signals from the spinal cord to muscles.
C. UMNs directly innervate muscles, while LMNs synapse with interneurons in the spinal cord.
D. UMNs control voluntary movements, while LMNs control involuntary reflexes.
Select your answer:
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Branches of Medicine Mitosis for Mya Anatomy Muscles Cell Vocabulary Parathyroid Gland Cell Biology & Biotechnology Non-infectious Disease Pollution Atoms and Radioactivity All About Blood Pharmacology Calculations Cell and Tissue Psoriasis CABG Surgery Bone, Spine, and Joint PathologyOther quiz:
Nail Enhancement › ViewThe ____ serves as the point of contact with the nail plate.
A. nail tip
B. nail wrap
C. nail well
D. nail resin
Biochemistry Vocabulary › View
Macromolecule
A. a chemical substance that cannot be broken down into other substances. The basic particle that constitutes a chemical element is the atom, and chemical elements are distinguished from each other by the number of protons in the nuclei of their atoms
B. a substance made up of two or more different chemical elements combined in a fixed ratio.
C. a particle that consists of a nucleus of protons and neutrons surrounded by a cloud of electrons.
D. a molecule containing a very large number of atoms, such as a protein, nucleic acid, lipid, or carbohydrate