Cells prevent mutations during DNA replication by using their mechanisms which are mismatch repair, direct repair, base excision repair, and nucleotide excision repair.
the autonomic (involuntary) nervous system controls the rate at which the heartbeats. sympathetic (fight or flight) signals speed up the heart’s rate while parasympathetic (rest and digest) signals slow it down. The part or parts of the heart that forms sympathetic and parasympathetic neurons form synapses is called cardiac plexus.
Cardiac plexus is a plexus of the nerves that are present at the base of the heart and is divided into superficial and deep part. The sympathetic and the parasympathetic nerves form synapses with heart in the form of cardiac plexus.
The sympathetic nerves are responsible for activating flight or fight mode while parasympathetic nerves are responsible for restoring the normal body state.
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Answer:
The defective Na+/K+ ATPase is not able to dephosphorylate itself.
Explanation:
Na+/K+ ATPase pump cycles between two different forms: the phosphorylated form of the Na+/K+ ATPase has a high affinity for K+ ions and low affinity for Na+ ions. The release of phosphate from ATP and phosphorylation of Na+/K+ ATPase makes the pump to release the bound 3 Na+ ions outside the cell and to bind to the 2 K+ ions from the surroundings. As the Na+/K+ ATPase is dephosphorylated, its affinity for K+ ions is reduced leading to the release of K+ inside the cell.
A defective Na+/K+ ATPase that is able to pick and bind the K+ ions but is not able to shuttle them across the membrane should be defective to achieve its dephosphorylated form. Without releasing phosphate, the affinity of the pump for K+ ions is not reduced and the pump would not be able to release them to the opposite side of the membrane.
Answer:a. A timer to signal how long to brush teeth
Explanation:
Stimulus control of behavior occurs when the performance of a particular behavior is controlled by the presence or absence of a discriminative stimulus. For example, the presence of a stop sign (a discriminative stimulus) at a traffic intersection increases the probability that "braking" behavior will occur.
