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 rate of calcium deposition occurs due to high blood calcium levels.
C. Increased physical activity causes lengthwise growth in response to bone stress.
D. Increased secretion of sex hormones promotes epiphyseal plate growth.
E. Increased absorption of dietary vitamins and minerals strengthens the matrix.
D
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Police officers who question multiple witnesses to a crime are primarily concerned with the _____ reliability of the eyewitnesses' account.
A. internal consistency B. test-retest C. inter-rater D. parallel form
After correctly positioning the laryngoscope blade in the patient's mouth, you should:
A) ask your partner to apply firm posterior pressure to the cricoid cartilage. B) gently pry back on the laryngoscope to obtain a view of the vocal cords. C) exert gentle traction at a 45° angle to the floor as you lift the patient's jaw. D) pull slightly back on the laryngoscope blade in order to view the epiglottis.
Which of the following is NOT true of glial cells?
A. They form the myelin for axons. B. Neurons outnumber glial cells 10 to 1 in the nervous system. C. They deliver fuel molecules to neurons and remove the waste products of metabolism. D. They are important for the growth and development of the nervous system. E. They regulate the composition of the extracellular fluid in the CNS.
Which of the following is true regarding endocrine glands?
A) They secrete their products by way of ducts. B) They release their secretions into the blood. C) They secrete substances that do not alter the metabolism of their target cells, but have extracellular effects. D) Their secretions may be released onto the body surface. E) They have an unusually low density of blood capillaries.