The urethra is ________ in the male than in the female.
Fill in the blank(s) with the appropriate word(s).
longer
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Select the correct statement about oxygen transport in blood
A) During conditions of acidosis, hemoglobin is able to carry oxygen more efficiently. B) Increased BPG levels in the red blood cells enhance oxygen-carrying capacity. C) A 50% oxygen saturation level of blood returning to the lungs might indicate an activity level higher than normal. D) During normal activity, a molecule of hemoglobin returning to the lungs carries one molecule of O2.
Which of the following statements is true regarding the thyroid hormones (T3 and T4)?
a. They inhibit hypothalamus secreting TRH (thyrotropin-releasing hormone) b. They inhibit anterior pituitary secreting TSH (thyrotropin or thyroid-stimulating hormone) c. They stimulate hypothalamus secreting TRH (thyrotropin-releasing hormone) d. They stimulate anterior pituitary secreting TSH (thyrotropin or thyroid-stimulating hormone)
Why would removal of the thymus compromise humoral immunity?
A. Once activated, B cells must travel to the thymus in order to produce antibodies. B. Helper T cells mature in the thymus and are needed to activate B cells and humoral immunity. C. B cells responsible for humoral immunity mature in the thymus. D. Most mature B cells reside in the thymus, so removing the thymus removes the majority of the body's B cells.
Among the advantages of the cerebral arterial circle is the presence of collateral channels of blood flow to the brain should a supply artery become blocked
Indicate whether this statement is true or false.