The division of each primary spermatocyte produces a pair of ________.
Fill in the blank(s) with the appropriate word(s).
secondary spermatocytes
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Which is a result of an absence of thyroid hormones during fetal development?
A. Addison's disease B. Acromegaly C. Cushing's syndrome D. Graves' disease E. Congenital hypothyroidism (cretinism)
Where in the embryo does mesoderm first appear?
A) between the cell layers of the inner cell mass B) within the blastocoele C) in the chorionic villi D) above the epiblast E) around the trophoblast
A change in a membrane potential from -70 mV to -70 mV is an example of
a. depolarization. b. hyperpolarization. c. polarization. d. repolarization. e. zero potential.
What is the function of the uvula?
A. To prevent food from entering the nasal cavity during swallowing B. To prevent infection from entering the lungs C. To prevent food from entering the larynx and trachea during swallowing D. To connect the tongue to the floor of the oral cavity E. To separate the hard palate from the soft palate