________ is a growth factor that stimulates both the production of megakaryocytes in the bone marrow and the subsequent formation of platelets.
Fill in the blank(s) with the appropriate word(s).
Thrombopoietin
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The all-or-none principle states that
A) all stimuli will produce identical action potentials. B) all stimuli great enough to bring the membrane to threshold will produce identical action potentials. C) the greater the magnitude of the stimuli, the greater the magnitude of the action potential. D) only sensory stimuli can activate action potentials. E) only motor stimuli can activate action potentials.
The parasympathetic nervous system is especially active during which physiological state?
A) exertion B) trauma C) digestion D) stress E) exercise
This figure shows a frontal view of a human. What does number 1 indicate?
A. Mediastinum?B. Pelvic cavity?C. Thoracic cavity?D. Pleural cavity?E. Pericardial cavity
Atrial natriuretic peptide increases aldosterone secretion.
A) adrenaline. B) erythropoietin. C) angiotensin. D) atrial natriuretic peptide. E) cortisol.