Enlarged area of the spinal cord from which nerves to the shoulder and upper limbs arise
A) cervical enlargement
B) lumbar enlargement
C) thoracic region
D) conus medullaris
E) sacral region
A
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Which of the following is not a characteristic of the second-messenger mechanism of hormone action?
A) Hormone effects are amplified. B) G proteins and cAMP are used. C) Receptors are on the cell surface. D) Cellular operations are altered by direct stimulation of a gene. E) Kinases may phosphorylate proteins.
Which of the following does not affect the range of motion at a joint?
A. the degree of tonus of surrounding muscles and ligaments B. the shape of the articular surfaces C. the exercise habits of the individual D. the number of proprioceptors present at the joint
Semen is
A. responsible for engorgement of erectile tissue of the penis. B. sperm cells plus the secretions of accessory glands. C. is composed only of sperm cells. D. a vaginal secretion needed to activate sperm cells. E. produced solely by the testis.
The steps in the process of endochondral ossification are a: Ossification center forms in the diaphysisb: Cartilage calcifies and a bone collar formsc: Ossification centers form in the epiphysesd: Bone replaces cartilagee: Epiphyseal plates ossifyf: Cartilage model developsThe correct chronological order for these steps is
A. f - b - c - d - a - e B. a - e - c - d - b - f C. f - b - a - c - d - e D. b - c - f - a - e - d E. a - c - b - d - e - f