An increase in the production of ADH affects the kidney tubules by
A. inhibiting reabsorption of sodium ion in the collecting duct.
B. decreasing the permeability of the glomerulus to water.
C. causing the walls of the collecting duct to become more permeable to water.
D. inhibiting the reabsorption of water in the glomerulus.
E. decreasing the insertion of aquaporins into the membranes of cells that line the collecting ducts.
C. causing the walls of the collecting duct to become more permeable to water.
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Which of the following is true about gametogenesis in humans?
a. Gametogenesis begins at puberty for males and females. b. Oogenesis starts during fetal development, while spermatogenesis begins at puberty. c. Spermatogenesis starts during fetal development, while oogenesis begins at puberty. d. In both males and females, gametogenesis results in four gametes from each diploid germ cell.
Which of the following occurs first during an action
potential? a. Many sodium ions flow into the neuron. b. Voltage-gated sodium channels open. c. A local disturbance triggers the resting voltage to reach the threshold level. d. The interior of the neuron becomes positive. e. The interior of the neuron becomes negative.
The energy used by the cell to generate specific biological molecules and highly ordered structures is stored in the form of _____________
(a) Brownian motion. (b) heat. (c) light waves. (d) chemical bonds.
Indicate whether each of the following is true for meiosis, mitosis, both, or neither
A. formation of a bivalent B. genetically identical products C. condensation ofchromosomes D. segregation of all paternal chromosomes to one cell E. involvement of DNA replication