Which of the following is not attributable to the immune defense system?
a. Defends against pathogenic microorganisms
b. Converts foreign chemicals into compounds that can be more readily eliminated in the urine
c. Removes worn-out cells and tissue debris
d. Identifies and destroys abnormal or mutant cells
e. Can inappropriately induce allergic responses and autoimmune disease
B
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A fracture at the ankle involving both lower leg bones is often called a ________ fracture
A) compression B) Pott's C) displaced D) greenstick E) Colles
Which is NOT true regarding autonomic reflexes?
A) Integrating centers for autonomic reflexes in the brain include the hypothalamus, brain stem, and limbic system. B) Autonomic reflexes are all monosynaptic, with their synapse in the central nervous system. C) Many autonomic reflexes are characterized by tonic activity, a continuous stream of action potentials. D) Vomiting, sneezing, and coughing are all examples of autonomic reflexes.
Brittle bone disease (osteogenesis imperfecta) usually results from a collagen deficiency. Explain how a collagen deficiency affects bone structure
What will be an ideal response?
An incompetent aortic semilunar valve would allow blood to backflow from the ________
A) right ventricle to the right atrium B) left ventricle to the left atrium C) aorta to the left ventricle D) aorta to the left atrium E) pulmonary trunk to the left ventricle