Which of the following characterizes the developmental age of an eight month old infant?
A. sits without support
B. rolls from its back to its side
C. smiles in response to people's faces
D. pulls itself up to a standing position
E. None of these choices is correct
A
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Identify the structures innervated by the cervical plexus. Select all that apply.
a. Skin of the face
b. Skin of the neck
c. Upper limb
d. Posterior portion of the head
e. Muscles of the hyoid
f. Diaphragm
Compared to a somatic reflex, an autonomic reflex utilizes
A. one motor neuron plus cardiac and smooth muscle and glands as effectors. B. one motor neuron plus skeletal muscles as effectors. C. two motor neurons plus cardiac and smooth muscle and glands as effectors. D. two motor neurons plus skeletal muscles as effectors. E. three motor neurons plus skeletal muscles as effectors.
The two types of cells that make up the nervous system are
A. macrophages and mast cells. B. neurons and chondrocytes. C. mast cells and fibrocytes. D. neurons and mast cells. E. neurons and glial cells.
Hyaluronic acid
A. contributes to the rigidity of a joint. B. is found in the synovial membrane. C. is responsible for the lubricating properties of synovial fluid. D. makes up most of the matrix of hyaline cartilage. E. makes surfaces rough.