Explain why a nerve impulse travels more quickly down a myelinated axon as compared with an unmyelinated axon.

The anatomical relationship of a spinal nerve to the spinal cord and how this relates to the concept of a spinal cord segment

In the cervical spine, which spinal nerve exits above/below the vertebral body of the same number?

Match the cranial nerves in column A with the associated functions in column B. Place the letter of your choice in the space provided.
Column A
a. Abducens
b. Accessory
c. Facial
d. Glossopharyngeal
e. Hypoglossal
f. Oculomotor
g. Olfactory
h. Optic
i. Trigeminal
j. Trochlear
k. Vagus
I. Vestibulocochlear
Column B
_____Vision

The median nerve is a component of the

a) cervical plexus.

b) brachial plexus.

c) lumbar plexus.

d) sacral plexus.

Adult tunicates have (a) a dorsal nerve cord (b) a pharynx with slits $(c)$ a notochord (d) all of the above.

Which of the following does not have nerve cells? a. hydra b. jellyfish c. sponge d. flatworm

Which of the following does not have nerve cells?

a. hydra

b. jellyfish

c. sponge

d. flatworm

Complete the following statement:
Cervical spinal nerve pair $\mathrm{C} 1$ originates between the occipital bone and the _______.

Briefly explain how nerve impulses are initiated and transmitted, and why conduction at synapses is always one-wa

Pitch depends on which of the following? a. Amplitude of a sound wave. b. Number of hair cells stimulated. c. Strength of nerve impulses traveling up the auditory nerve. d. Number of sound waves that reach the ear in a given time. e. Decibels of a sound wave.

The organ of smell is the ___________, located in the roof of the nasal cavity.

a. nares c. olfactory epithelium b. nostrils d. olfactory nerve

Circle the correct underlined term. $\underline{{Excitability }}$ / $\underline{{Conductivity}}$ is the ability to transmit nerve impulses to other neurons.

Match the cranial nerves in column A with the associated functions in column B. Place the letter of your choice in the space provided.
Column A
a. Abducens
b. Accessory
c. Facial
d. Glossopharyngeal
e. Hypoglossal
f. Oculomotor
g. Olfactory
h. Optic
i. Trigeminal
j. Trochlear
k. Vagus
I. Vestibulocochlear
Column B
_____ Regulates thoracic and abdominal viscera