The right AV valve is known as the:
A) aortic semilunar valve
B) tricuspid valve
C) mitral valve
D) pulmonary semilunar valve
E) bicuspid valve
Ans: B) tricuspid valve
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Which steroid is secreted by the adrenal cortex to increase reabsorption of sodium ions?
A. Antidiuretic hormone B. Aldosterone C. Adrenaline D. Angiotensin
The five cavities of the head are cranial, oral, nasal, middle ear, and ________.
What will be an ideal response?
Fast fibers
A) have loosely packed myofibrils. B) have a high concentration of myoglobin. C) have many mitochondria. D) have high glycogen reserves. E) are about half the diameter of slow fibers.
Under normal conditions, T lymphocytes in an adult are primarily found in the ________.
A. thymus B. blood C. lymph nodes and spleen D. bone marrow