What is homeostasis?
A. Positive feedback
B. Negative feedback
C. The body's ability to maintain a steady internal environment
D. The body's ability to function outside of the optimal range
Answer: C
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As the respiratory system ages:
a. the costal cartilages harden b. a condition called “barrel chest” develops c. the strength of inspiratory and expiratory muscles decreases d. all of the above
Which of the following statements about juxtamedullary nephrons is incorrect?
a. Their glomeruli lie in the renal medulla. b. They are important in the ability of the kidneys to concentrate urine. c. Their loops of Henle dip deep into the medulla. d. Their peritubular capillaries form vasa recta. e. They are not the predominant type of nephron found in human kidneys.
Which of the following is an appendicular muscle group rather than an axial muscle group?
A) muscles of the pelvic floor B) muscles of the head C) oblique and rectus muscles D) hamstring group E) muscles of the vertebral column
Which lymphatic vessel is the largest?
A) Lymph duct B) Lymph trunk C) Lymphatic capillary D) Lymph-collecting vessel