For the Problem Below, θ  Is a Central Angle in a Circle

question 39

Short Answer

For the problem below, θ  is a central angle in a circle of radius r . Find the length of arc s cut off by θ . θ = 30°, r = 2  mm. If the answer needs rounding, round it to three significant digits. s = __________ mm

---

Definitions:

Chemical Synapse

A specialized junction at which a neuron communicates with a target cell across a synaptic cleft using chemical messengers.

Presynaptic Terminal

The end of a nerve fiber where the release of chemicals (neurotransmitters) occurs, enabling the transfer of the signal to another neuron's receptor site.

Postsynaptic Membrane

Refers to the membrane on the neuron receiving end of a synapse, where neurotransmitters are received.

Voltage-Gated Channel

A type of ion channel that opens or closes in response to changes in the electrical potential across the cell membrane.