Sending Signals & Reflexes

The synaptic cleft is:

• a gap between neurons where neurotransmitters are released

• a part of the neuron that receives signals

• the main body of the neuron

• a type of neurotransmitter

Cold temperatures cause numbness by:

• reducing blood flow to the skin and extremities, leading to decreased sensation

• increasing blood flow to the skin and extremities, leading to increased sensation

• causing the body to produce more heat, which numbs the nerves

• stimulating nerve endings, increasing sensitivity

Why do your arms & legs “fall asleep” if you sit or lay a certain way?

• Due to lack of blood flow

• Because of nerve compression

• As a result of muscle fatigue

• From dehydration

A 2 neuron reflex is quicker than a 3 neuron reflex because:

• it involves fewer synapses.

• it has more synapses.

• it requires more processing time.

• it involves more neurons.

Rapid, predictable, involuntary responses to stimuli are called reflexes.

• True

• False

Rapid, predictable, involuntary responses to stimuli are called movements.

• True

• False

Established neural pathways of the CNS & PNS are called reflexes.

• True

• False

Established neural pathways of the CNS & PNS are called movements.

• A. True

• B. False

Skeletal muscle responses are known as somatic reflexes.

• True

• False

Skeletal muscle responses are known as autonomic reflexes.

• A. True

• B. False