In the human male, sperm cells are produced in the ________ and are suported by the ________.
A. seminiferous tubules; Sertoli cells
B. interstitial tissue; cervix
C. vas deferens; endometrium
D. urethra; uterus
E. seminal vesicles; oviduct
Answer: A. seminiferous tubules; Sertoli cells
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Answer the following statement(s) true (T) or false (F)
1. Locomotion is a function of the spinal cord. 2. Ascending signals in the spinal cord travel via gray matter, while descending signals travel via white matter. 3. The cervical and lumbar enlargements are wide points in the spinal cord marking the emergence of motor nerves. 4. Nerve fibers in a given white matter tract are similar in origin, destination, and function. 5. Voluntary motor signals typically begin in an upper motor neuron in the thalamus.
Which of the following is true?
A. No particular biomechanical factors have been associated with running economy. B. 3-year olds walking fast can use 70% more energy than adults. C. both A and B D. none of the above
Which of the disorders below is characterized by destruction of the walls of the alveoli producing abnormally large air spaces that remain filled with air during exhalation?
A) pneumonia B) tuberculosis C) emphysema D) coryza
What flap of elastic cartilage keeps food and liquids from entering the larynx during swallowing?
A) corniculate cartilage B) arytenoid cartilage C) epiglottis D) thyroid cartilage