The presence of vitamin D is necessary for PTH to exert its effect on promoting intestinal Ca2+ absorption
Indicate whether the statement is true or false
F
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Which of the following statements is a false or incorrect statement?
A) The lymphoid organs where lymphocytes become immunocompetent are called primary lymph organs. All other lymphoid organs are referred to as secondary lymphoid organs. B) After becoming immunocompetent, the naive T cells and B cells are exported to the bone marrow where the encounters with antigens occur. C) It is our genes, not antigens, that determine what specific foreign substances our immune system will be able to recognize and resist. D) T cells and B cells become activated when they bind with recognized antigens.
A receptor that contains many mechanically gated ion channels would function best as a
A) tactile receptor. B) chemoreceptor. C) nociceptor. D) thermoreceptor. E) light receptor.
What is the primary energy source for ejaculated sperm?
a. fructose b. glucose c. galactose d. lactic acid e. fatty acids
What muscle has an origin of the medial and lateral condyles of the femur and an insertion of the posterior calcaneus?
A. Tibialis anterior B. Soleus C. Plantaris D. Gastrocnemius