Unit 3 Control and Coordination

Vagus

the longest nerve that extends all the way into the badomen

Facial

operates muscles for expressions, salivating, blinking, and more

Olfactory

responsible for sending information from smell receptors to the brain

trochlear and abducens

a motor nerve that controls the movement for one eye muscle

optic

a sensory nerve that sends visual information to the brain

vestibulocochlear

plays a key role in our ability to hear and balance

oculomotor

controls the pupils’ response to light as well as the other four eye muscles

trigeminal

the largest nerve that innervates the face and jaw muscles

accessory

controls the muscles in the neck

hypoglossal

enables us to swallow and talk by controlling most of the muscles in the tongue

glossopharyngeal

acts as a motor nerve in our ability to taste and swallow while also acting as a sensory nerve by sending sensory information from the sinuses to the brain

reflex

an automatic reaction to stimuli

What division of the peripheral nervous system would a reflexive action fall under?

sensory/afferent

After the initial stimulus reception, where does the sensory neurons transmit the impulse?

from the peripheral nervous system to the central nervous system

Where is the “integration center” and what happens there?

Spinal cord; information is decoded

The motor neuron conducts an impulse to which effector organ? what is the resulting effect?

muscles; to move the hand away from the heat

Path of sound from outer ear to brain

outer ear, ear canal, ear drum, middle ear bones, cochlea, basilar membrane, hair cells, nerve cells

Lens

focuses the light and projects it onto the retina

Retina

contains the photoreceptors that receive the light

fovea centralis

gives us our sharpest and clearest vision

What two organs in the endocrine system promote rhythmic hormone release in this way?

hypothalamus and anterior pituitary

Endocrine gland of oxytocin

Posterior pituitary gland

Location of posterior pituitary gland

at the base of the brain, below the hypothalamus, behind nose bridge

Hormone the posterior pituitary gland excretes

Oxytocin

Target organ of posterior pituitary gland

Brain, uterus, heart

Resulting effects of oxytocin affecting target organs

regulation of social behaviors, manages stress, slows heart rate