The depolarization phase of an action potential is punctuated by the closing of inactivation gates in the voltage gated sodium ion channels. all of the following are consequences of this inactivation except one. choose the statement below that is not a consequence of the closing of inactivating gates. a) this allows for the efflux (diffusion out) of potassium ions, resulting in the repolarization of the cell. b) this allows for the one way transmission of action potential down the axon. c) this limits the frequency of action potentials down the axon. d) this stops the depolarization of the axon membrane. a) this allows for the efflux (diffusion out) of potassium ions, resulting in the repolarization of the cell.

fertilization, pictured in figure 24.23a is the process in which gametes (an egg and sperm) fuse to form a zygote. the egg and sperm each contain one set of chromosomes. to ensure that the offspring has only one complete diploid set of chromosomes, only one sperm must fuse with one egg. in mammals, the egg is protected by a layer of extracellular matrix consisting mainly of glycoproteins called the zona pellucida. when a sperm binds to the zona pellucida, a series of biochemical events, called the acrosomal reactions, take place. in placental mammals, the acrosome contains digestive enzymes that initiate the degradation of the glycoprotein matrix protecting the egg and allowing the sperm plasma membrane to fuse with the egg plasma membrane, as illustrated in figure 24.23b. the fusion of these two membranes creates an opening through which the sperm nucleus is transferred into the ovum. the nuclear membranes of the egg and sperm break down and the two haploid genomes condense to form a diploid genome.

explanation:

haploid cells;

c. establishing proper sleep hygiene