A clot or plaque which forms on the inside of blood vessel walls is called a/an ________.
A. arteriosus
B. plaque
C. embolus
D. sclerosis
E. thrombus
Answer: E
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Which two muscles act antagonistically?
A) tibialis anterior; fibularis longus B) flexor digitorum longus; gastrocnemius C) gastrocnemius; soleus D) extensor digitorum longus; flexor digitorum longus
All of the following are true of muscle spindles except that they
A) are found within skeletal muscle. B) consist of specialized fibers called intrafusal fibers. C) are found in tendons. D) are the receptor for the stretch reflex. E) are innervated by gamma motor neurons.
You are diagnosed with the autoimmune disease Systemic Lupus Erythematosus, causing your immune system to produce antibodies against specific tissues in your body. This best represents a failure of ________.
A. innate immunity B. clonal-anergy, because lymphocytes that recognize self antigens are not being activated C. central tolerance, because lymphocytes that recognize self antigens are not being activated D. clonal-deletion, because lymphocytes that recognize self antigens are not being destroyed
When a walking person lifts one foot off of the ground, which of these happens?
A. The body leans so that the center of gravity shifts over the foot that is on the ground. B. The body leans so that the center of gravity shifts over the foot that is lifted off the ground. C. The center of mass is left behind by the acceleration of the body, so the body must lean forward to compensate. D. The body accelerates forward, but the center of gravity shifts over the foot that is lifted off the ground. E. The body only accelerates forward, so the center of gravity remains directly between the two feet.