As a more subtle means of destruction, neutrophils secrete lactoferrin, a protein that tightly binds with iron, making it unavailable for use by invading bacteria
a. True
b. False
Indicate whether the statement is true or false
True
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During pulmonary ventilation, relaxation of the diaphragm and external intercostals ________ and air flows out of the lungs.
A. stimulates the phrenic nerve B. expands the rib cage C. increases the volume of the thoracic cavity D. flattens the floor of the thoracic cavity E. increases the pressure in the thoracic cavity
Which of the following types of vertebrae and their numbers is not correct?
A) cervical: 7 B) thoracic: 12 C) lumbar: 5 D) sacral: 2 fused E) coccygeal: 3 to 5 fused
The ________ of the humerus is called the "funny bone." The tingling sensation that you experience is due to striking of the ulnar nerve that runs behind this structure
A) olecranon process B) lateral epicondyle C) medial epicondyle D) olecranon fossa
What protein makes stratified epithelial tissues tough and resistant to friction?
A) reticular B) collagen C) elastic D) keratin