Which vitamin is required for the normal synthesis of collagen?
A. Vitamin C
B. Vitamin B
C. Vitamin D
D. Vitamin K
E. Vitamin A
Answer: A
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This figure shows spinal nerve branches. What structures are indicated by number 4?
A. Anterior rami B. Posterior rami C. Rami communicantes D. Sympathetic trunk ganglia E. Posterior root ganglia
What component of a synovial joint lubricates the joint, supplies nutrients and removes metabolic wastes, and absorbs shock?
A) ligament B) articular cartilage C) synovial fluid D) adipose tissue
What movements are made possible by the rotation of the head of the radius?
A) rotation and circumduction B) adduction and abduction C) pronation and supination D) flexion and extension E) rotation and adduction
What provides toughness to the dermis and holds water in this skin layer?
A) Merkel cells B) collagen fibers C) melanocytes D) elastic fibers E) epidermis dendritic cells