The portion of the eye that contains blood vessels, pigment cells, loose connective tissue, and intrinsic muscle fibers is the
A) conjunctiva.
B) cornea.
C) iris.
D) pupil.
E) canthus.
C) iris.
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When an action potential passes over the surface of a synaptic knob, the contents of the vesicles are released in response to the presence of
A. sodium ions. B. neuropeptides. C. neurotransmitters. D. calcium ions.
Vitamin D (calcitriol)
A) synthesis is stimulated by high calcium levels. B) is formed by sunlight and bound to plasma protein for transport. C) is formed by sunlight and synthesis is stimulated by high calcium levels. D) is bound to plasma protein for transport only. E) is formed by sunlight only.
The ________ is equal to the hydrostatic pressure of the blood in the capillaries minus the hydrostatic pressure of tissue interstitial fluid outside the capillaries.
A. blood pressure B. net filtration pressure C. osmotic pressure D. None of the choices are correct.
The integrating centers for temperature-regulating reflexes are located in the brain stem
Indicate whether the statement is true or false.