The Concentration of a Trace Essential Element in the Body $\mu$

question 59

Multiple Choice

The concentration of a trace essential element in the body is typically in the range of _____per gram ofbody mass.

• A)1 \(\mu\) g to 1 mg
• B)1 \(\mu\) g to 10 mg
• C)10 \(\mu\) g to 10 mg
• D)10 \(\mu\) g to 100 mg
• E)100 \(\mu\) g to 100 mg

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Definitions:

Presynaptic Terminal

The end part of a nerve cell (neuron) that releases neurotransmitters to send a signal across the synapse to another neuron.

Acetylcholine

A neurotransmitter involved in many functions including muscle activation, heart rate, and the processing of memory and cognition.

Synaptic Cleft

The microscopic gap between neurons across which neurotransmitters are released, facilitating communication between cells.

Neurotransmitter Effects

The impacts or actions exerted by neurotransmitters, which are chemicals responsible for transmitting signals across a chemical synapse between neurons or between neurons and muscles.