The proximal radioulnar joint is a __________ joint.
A. ball-and-socket
B. saddle
C. hinge
D. pivot
E. condylar
D. pivot
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A thin layer of tissue that covers an organ or lines a cavity is a ________.
A. lamella B. membrane C. mesentery D. dendrite E. tendon
The proper buffer pair ratio is:
a. 20 times more sodium bicarbonate than carbonic acid b. 20 times more carbonic acid than sodium bicarbonate c. 10 times more sodium bicarbonate than carbonic acid d. 10 times more carbonic acid than sodium bicarbonate
Which of the following is not involved in creating the resting potential of a neuron?
A) diffusion of potassium ions out of the cell B) diffusion of sodium ions into the cell C) Membrane permeability for sodium ions is greater than for potassium ions. D) Membrane permeability for potassium ions is greater than for sodium ions. E) The interior of the plasma membrane has an excess of negative charges.
The major regions of a hair shaft include all of the following except ________
A) external root sheath B) cortex C) cuticle D) medulla