What is characteristic of a congenital disorder?
A) There is a genetic component.
B) It is a developmental anomaly.
C) A cause is known.
D) Usually manifested in the neonatal period.
Answer: D) Usually manifested in the neonatal period.
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Mechanisms that do not help regulate blood pressure include ________.
A) nervous control that operates via reflex arcs involving baroreceptors, chemoreceptors, and higher brain centers B) the dural sinus reflex C) renal regulation via the renin-angiotensin system of vasoconstriction D) chemical controls such as atrial natriuretic peptide
Scientists recently discovered a possible new route for direct exchange of materials between cells: ____
a. piggy back molecules b. tunneling nanotubes c. microcrystals d. protein carriers e. lipid bridges
All of the following are functions of parathyroid hormone except which one?
A. Causes the small intestines to absorb calcium in order to increase blood calcium levels B. Causes the kidney to reabsorb calcium in order to maintain blood calcium levels C. Causes osteoclasts to reabsorb bone therefore increasing blood calcium levels D. Causes osteoblasts to deposit bone, reducing blood calcium levels
The individual with emphysema attempts to forcefully expire, which exacerbates (worsens) the problem of airway collapse, since now the floppy airways are excessively compressed by the tremendous rise in intrathoracic pressure. Additionally, a person with emphysema has a __________ residual volume due to not being able to expire the normal volume of air; this causes a(n) __________ in vital capacity.
A. smaller; decrease B. smaller; decrease C. larger; increase D. larger; decrease