In a lumbar puncture (spinal tap), fluid is extracted from the
A. subdural space.
B. epipial space.
C. subarachnoid space.
D. central canal of the spinal cord.
E. epidural space.
Answer: C
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Which of the following is not a way to conserve or generate heat?
A) shivering thermogenesis B) nonshivering thermogenesis C) vasoconstriction in the skin D) increasing the depth of respirations E) release of thyroxine
What explains the dramatic acceleration in lengthwise bone growth at puberty?
A. Increased activity of osteoclasts occurs in response to parathyroid hormone stimulation. B. Increased absorption of dietary vitamins and minerals strengthens the matrix. C. Increased rate of calcium deposition occurs due to high blood calcium levels. D. Increased physical activity causes lengthwise growth in response to bone stress. E. Increased secretion of sex hormones promotes epiphyseal plate growth.
During a biology lab, Erin used a cotton swab to remove some tissue from the inner side of her cheek. She then placed the tissue on a slide to examine it under the microscope. When Erin examined the cells under the microscope, what shape were the cells?
a. squamous b. cuboidal c. columnar d. circular
The figure illustrates the layers of the epidermis. Which layer of the epidermis is "A"?
A. Stratum lucidum B. Stratum corneum C. Stratum spinosum D. Stratum basale E. Stratum granulosum