Which of the following is a feature that distinguishes active transport from facilitated diffusion?
A. saturation of transport rate
B. requirement for a carrier molecule
C. carrier molecules have specificity
D. presence of a transport maximum
E. requirement for metabolic energy
E
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In these views of the larynx, what structure does number 2 indicate?
A. Cricothyroid muscle B. Thyrohyoid muscle C. Hyoid bone D. Cricoid cartilage E. Thyroid cartilage
The one-way propagation of action potentials down an axon is primarily due to
A) sodium ion depletion. B) potassium ion depletion. C) the absolute refractory period. D) ATP loss.
The semicircular ducts are part of the membranous labyrinth
Indicate whether this statement is true or false.
Since each kind of B cell carries its own particular antibody molecule in its cell membrane, activation can only occur in the presence of a(n):
corresponding antigen immunosuppressive drug CD3 receptor complex cytotoxic T cell None of the choices are correct