During embryonic development, the first portion of the ear to develop is the
a) middle ear.
b) internal ear.
c) external ear.
d) bony labyrinth.
e) membranous labyrinth.
b
Anatomy & Physiology
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The determinant of whether heart valves are open or closed is the pressure difference across them.
Answer the following statement true (T) or false (F)
Anatomy & Physiology
The respiratory control areas are in the
A) pons and medulla oblongata. B) hypothalamus and hippocampus. C) alveoli. D) cerebral cortex.
Anatomy & Physiology
Bone marrow stem cells and mast cells proliferate in response to ________.
A. interleukin-1 B. interleukin-2 C. interleukin-3 D. interleukin-4
Anatomy & Physiology
The two major groups of white blood cells are ________
A) leukocytes and erythrocytes B) platelets and megakaryocytes C) neutrophils and basophils D) granulocytes and agranulocytes E) granulocytes and leukocytes
Anatomy & Physiology