The phosphate "head" of a phospholipid is
A) hydrophobic.
B) hydrophilic.
C) polar.
D) nonpolar.
E) both hydrophilic and polar.
E) both hydrophilic and polar.
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What is the role of myoglobin in muscle contraction?
A. Creatine phosphate generator in muscle B. ATP carrier in muscle C. Blood carrier in muscle D. Oxygen carrier in muscle
During the rising (depolarizing) phase of a neuronal action potential,
A. PK+ becomes much greater than PNa+. B. K+ flows rapidly into the cell. C. PK+ is the same as PNa+. D. Na+ efflux (flow out of the cell) occurs. E. PNa+ becomes much greater than PK+.
Answer the following statements true (T) or false (F)
1. The distal convoluted tubule is an extension of the descending loop of Henle. 2. The distal convoluted tubule connects with the collecting tubule. 3. The distal and proximal convoluted tubules are named for their proximity to Bowman’s capsule. 4. The loop of Henle is located between Bowman’s capsule and the proximal convoluted tubule. 5. The loop of Henle is located between the distal convoluted tubule and the collecting tubule.
Differentiate between the roles the organic matrix and calcium salts play in giving bone strength yet flexibility
What will be an ideal response?