Which four elements comprise approximately 96% of our body weight?
A. carbon, oxygen, iron, and potassium
B. carbon, oxygen, hydrogen, and nitrogen.
C. carbon, oxygen, hydrogen, and potassium.
D. carbon, oxygen, potassium, and sodium.
Answer: B. carbon, oxygen, hydrogen, and nitrogen.
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Which of the following is TRUE about the concentration gradient of Na+ in a neuron at rest?
A. It is in the same direction as the diffusion potential due to the concentration gradient for K+. B. It favors movement of Na+ in the opposite direction as the electrical potential acting on Na+ at the resting membrane potential. C. It favors its movement into the cell at the resting membrane potential. D. It favors its movement out of the cell at the resting membrane potential. E. It is equal and opposite to the electrical potential acting on Na+ at the resting membrane potential.
Spongy bone
A. contains no osteocytes. B. has spaces filled with yellow marrow. C. is composed of tubular units called osteons. D. forms diploe in the cranial bones. E. All of the choices are correct.
Which of the paired cartilages of the larynx articulate with the cricoid cartilage?
A. Thyroid B. Corniculate C. Cuneiform D. Arytenoid E. Epiglottis
Explain the role of vasodilation and vasoconstriction in thermoregulation
What will be an ideal response?