Describe a motor unit. How many fibers does a motor unit contain?
A motor unit consists of all of the skeletal muscle fibers controlled by a single motor neuron. They may have as few as 10 fibers (eye muscles) or as many as 10,000 (back muscles).
Anatomy & Physiology
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Where is the latissimus dorsi?
a) A b) B c) F d) G e) I
Anatomy & Physiology
The spinal nerves are formed by the ________
A) dorsal and ventral roots B) pia mater C) dura mater
Anatomy & Physiology
T cells that are activated by costimulation involving a class I MHC and CD8 markers are called __________.
a. plasma cells b. cytotoxic T cells c. memory B cells d. helper T cells
Anatomy & Physiology
The cardioregulatory center of the brain is located in the
A. cerebellum. B. diencephalons. C. hypothalamus. D. cerebrum. E. medulla oblongata.
Anatomy & Physiology