Hi I need some help with these questions. Can you please help me.

6. Using data from the Australian twin register, Heath et al (1989) found that rates of alcohol use was higher for twins not in marriage-like relationships compared to those in marriage-like relationships, possibly showing that social experiences can impact genetic expression.

7. Children with Idiopathic Short Stature are otherwise healthy children who are in the bottom percentile in height compared to agemates and will be short adults. Studies show that administering Growth Hormones can increase height potential by 4-6cm but many will still be on the low end of adult height. This might be a finding consistent with:

18. When Neuron A fires (Action Potential travels down the axon), Neurotransmitters are released from Neuron A and travel across the . Those Neurotransmitters bind to on Neuron B.

19. After activating Neuron B, Neurotransmitters must be cleared from the synaptic gap through a process called:

20. In a state of readiness, the neuronal membrane is at the . When the internal charge reaches threshold, the active electric signal moves down the axon called the .

21. Just like sending an email, it doesn't matter how hard you press the Send button nor does the email get stronger as it gets closer to the recipient, action potentials are the same referred to as what phenomenon?