Question

What happens to neurotransmitters once they’ve elicited their effect?

		They are degraded by enzymatic action.
		All of these.
		None of these.
		They diffuse away.
		They can be taken up by the neuron.

Which types of endogenous (naturally occurring) performance enhancers are considered important for brain activity during exercise because they make you faster, stronger and quicker?

		Hormones
		Neurochemicals
		Proteins
		DNA

Kiddie, 23, and his grandpa Pappi, 68, have to walk faster to catch the metro. Luckily they both manage to jump on the train coach. After the short run they both have accelerated heart beats, but Pappi's heart rate takes a longer time than Kiddie's to go back to normal. This is because with aging we lose organ's ___________________.

		metabolic rate
		functional reserve
		body mass index
		homeostasis

The synapse:

		shields neurons from viral and bacterial invaders.
		allows neurons to communicate with each other.
		is the specialized structure allowing action potentials to travel directly between neurons.
		is the specialized structure that makes action potentials travel faster.
		is the specialized structure that allows the action potential to regenerate itself.

Answer 1

1. Neurotransmitters are mainly released in to synapse, enabling the passage of signal to the next cell. Once they have elicited their effect,the excess neurotransmitters are degraded by enzymatic action, so that the effect doesn't prolong leading to dirordered functioning.

2. Hormones are the enhancers that are required for brain activity. Group of hormones called endorphins mainly perform this function.

3. As we age, the functional reserve capacity of heart muscles and skeletal muscles reduces, leading to a longer recovery time after intense exercise of any form.

4. Synapse is the space present between two neurons or an neuron and a cell. This forma a passage of communication between adjacent cells. Signal is transmitted chemically here. Therefore, it allows neurons to communicate with each other.