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Let's clarify and correct the provided text and questions, then answer them.<br /><br />**Corrected Text and Questions:**<br /><br />**Text:** Changing the strength of **synapses**, or even adding new ones or removing existing ones, changes how neurons communicate and thus affects memory. Dopamine plays a key role in strengthening synapses related to rewarding experiences.<br /><br />**Question 1:** How did H.M.'s surgery (removal of the hippocampus) impact his memory?<br />(1) He remembered watching old movies.<br />(2) He was no longer able to permanently store new memories.<br />(3) He was no longer able to remember anything at all.<br />(4) He was no longer pleasant to his coworkers.<br /><br />**Question 2:** What controls with whom we affiliate and why?<br />(1) Your heart<br />(2) Your parents<br />(3) Your emotions<br />(4) Your brain<br /><br />**Question 3:** Which of the following is a true statement about the brain's reward circuit?<br />(1) The cortex assesses the level of threat.<br />(2) The cortex processes and evaluates the level of reward and releases dopamine.<br />(3) The cortex is the emotional center and explains the incentives.<br /><br /><br />**Answers and Explanations:**<br /><br />**Answer 1:** (2) He was no longer able to permanently store new memories.<br /><br />* **Explanation:** H.M.'s case is famous in neuroscience. The removal of his hippocampus resulted in anterograde amnesia, meaning he couldn't form new long-term memories. He could still remember things from before the surgery, but not after.<br /><br />**Answer 2:** (4) Your brain<br /><br />* **Explanation:** While emotions (influenced by the brain) play a significant role in who we affiliate with, the brain itself is the control center. It processes information, evaluates social cues, and ultimately drives our decisions about social connections. Parents and heart function can influence this, but the brain is the ultimate decision-maker.<br /><br />**Answer 3:** (2) The cortex processes and evaluates the level of reward and releases dopamine.<br /><br />* **Explanation:** The reward circuit, involving areas like the prefrontal cortex and nucleus accumbens, evaluates the reward value of stimuli and experiences. Dopamine, a neurotransmitter associated with pleasure and motivation, is released in response to rewarding stimuli, reinforcing behaviors that lead to those rewards. While the cortex plays a role in assessing threats, that's primarily the function of the amygdala within the limbic system. The cortex is involved in higher-level processing of emotions and rewards, not simply being the "emotional center."<br />