The portion of the kidney that is composed of cone-shaped renal pyramids is called the
A. cortex.
B. medulla.
C. pelvis.
D. calyx.
E. columns.
B
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There are twenty different aminoacyl-tRNA synthetases.
Answer the following statement true (T) or false (F)
One of the characteristics of muscle tissue is that is has conductivity. Which of the following best describes this characteristic?
A) Muscles contract when stimulated. B) Muscles have local electrical charges that are capable of moving along the muscle fiber. C) Muscles only pull; they cannot push. D) Muscles can stretch when needed.
Which of the following are not secreted by platelets?
A. Thrombopoietin B. Vasoconstrictors C. Procoagulants D. Growth factors E. Chemicals that attract neutrophils
The thermoneutral zone is defined as:
A. the region in the central core of the body where temperature never changes. B. the core body temperature at which no energy is expended to maintain homeostasis. C. the environmental temperature range over which the changes in skin blood flow alone can regulate body temperature. D. the region of the body halfway between the high-temperature core and the low-temperature skin. E. the environmental temperature range in which shivering, changes in blood flow, and changes in thyroid hormone concentrations can maintain homeostasis of the body's core temperature.