Ossification of the ends of long bones ________.
is a characteristic of intramembranous bone formation
is produced by secondary ossification centers
involves medullary cavity formation
takes twice as long as diaphysis ossification
is produced by secondary ossification centers
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The stage in meiosis where chromosomal exchange takes place is telophase
Indicate whether the statement is true or false
Which of the following evolutionary adaptations would result in an increase in the speed of conduction of action potentials by decreasing the longitudinal resistance of the axon?
a. increasing the number of channels in the plasma membrane b. myelinating the axon c. increasing the diameter of the axon d. placing all voltage-gated ion channels at distant intervals e. None of these.
Antidiuretic hormone (ADH) is synthesized in the ________ and released from the ________.
A. anterior pituitary; hypothalamus B. hypothalamus; posterior pituitary C. anterior pituitary; posterior pituitary D. hypothalamus; anterior pituitary
Thyroxine and triiodothyronine, the thyroid hormones, do not have a specific target organ; instead, they stimulate most of the cells of the body to metabolize at a faster rate.
a. true b. false