Cutaneous effectors such as blood vessels, sweat glands, and erector pili muscles are innervated by ________.
A. only parasympathetic nerves
B. only sympathetic nerves
C. both parasympathetic and sympathetic nerves
D. both parasympathetic and somatic nerves
Answer: B
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During embryonic development, the lens of the eye develops directly from an invagination of the lens placodes called the
a) optic groove. b) optic vesicle. c) optic stalk. d) prosencephalon. e) lens vesicle.
The superior portion of the sternum has a central jugular notch located between the ________.
Fill in the blank(s) with the appropriate word(s).
Which of the following functions would not be performed by the kidney?
A. Regulate synthesis of vitamin D B. Regulate synthesis of RBCs C. Urine storage D. Maintenance of fluid balance E. Excretion of waste
In which bone is the foramen magnum located, and what is significant about this opening?
A) sphenoid; surrounds the connection between the brain and the spinal cord B) sphenoid; permits the passage of a branch of the trigeminal nerve C) temporal; permits the passage of a branch of the trigeminal nerve D) occipital; permits the passage of the hypoglossal nerve E) occipital; surrounds the connection between the brain and the spinal cord