Which of the following are primarily responsible for maintaining the salinity gradient of the renal medulla?
A) Collecting ducts
B) Proximal convoluted tubules
C) Cortical nephrons
D) Distal convoluted tubules
E) Juxtamedullary nephrons
E
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If there was an increased concentration of K+ outside of the neuron, which would be TRUE?
A. The potassium equilibrium potential of nerve cells would become more negative. B. The sodium equilibrium potential would become less positive. C. Neurons would spontaneously hyperpolarize. D. During an action potential, the neuron would repolarize slowly or stay depolarized. E. Neurons would spontaneously depolarize.
The portion of a DNA molecule that contains the genetic information for making a protein is called a gene.
Answer the following statement true (T) or false (F)
Which of the following is a function of the stomach?
A. It churns food into a paste by mechanical means. B. It absorbs most of the nutrients in food. C. It digests lipids. D. Most chemical digestion takes place in the stomach. E. It stores food in the form of fat.
Which skin condition is characterized by an overgrowth of skin cells and improper keratinization?
A. Scleroderma B. Warts C. Dermatitis D. Psoriasis