Muscle Contraction, Sensory Pathways, and Endocrine Anatomy

What neurotransmitter is released at the axon terminal?

Acetylcholine (Ach)

What is generated along the sarcolemma after neurotransmitter release?

An action potential

Where does the action potential travel after the sarcolemma?

To the T-tubules

What is released into the muscle cell from the sarcoplasmic reticulum?

Calcium

What does calcium attach to in muscle contraction?

Troponin

What forms the cross-bridge during muscle contraction?

Actin attaches to myosin heads

What structure focuses light onto the retina?

The lens

What sends visual signals toward the optic disc?

Photoreceptors on the retina

What carries visual information to the thalamus?

The optic tract

Which lobe of the brain receives visual information from the thalamus?

The occipital lobe

What funnels sound from the auricle?

The external auditory canal

What creates vibrations in the auditory system?

The tympanic membrane

What nerve carries sound information to the thalamus?

The vestibulocochlear nerve

Which lobe of the brain processes sound information from the thalamus?

The temporal lobe