Which is not true about synovial joints?
A. Ligaments strengthen and reinforce joints.
B. Synovial fluid is secreted by the synovial membrane.
C. All articulating bone surfaces are covered with articular cartilage.
D. Synovial joints are enclosed by fibrous articular capsules.
E. Blood circulates within the joint cavity to nourish the articular cartilage.
Answer: E
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The effects of aging on the skin include
A) a decline in the activity of sebaceous glands. B) increased production of vitamin D. C) thickening of the epidermis. D) an increased blood supply to the dermis. E) a decreased number of sweat glands.
The five vertebral regions are the cervical, thoracic, lumbar, sacral, and
A) medial. B) proximal. C) distal. D) coccygeal. E) os coxal.
The following steps occur in rods when they are excited by photons of light. What is the proper sequence for these steps? 1. Membrane sodium channels close. 2. Increased phosphodiesterase breaks down cGMP. 3. Retinal changes from the 11-cis form to the 11-trans form. 4. The membrane hyperpolarizes and the rate of neurotransmitter release declines. 5. Opsin activates transducin. 6. Opsin
activation occurs. A) 1, 6, 5, 2, 4, 3 B) 3, 6, 5, 2, 1, 4 C) 6, 3, 5, 2, 1, 4 D) 3, 6, 5, 1, 2, 4 E) 1, 3, 4, 5, 6, 2
Which type of connective tissue predominates in the deep portion of the dermis, where it lends strength to the skin?
A. Adipose B. Dense regular C. Dense irregular D. Cartilage E. Areolar