Sensory organs & Nervous system - 1st sem finals

Cerebellum

Region of nervous system responsible for coordination of movement

Support neurons

Function of glial cells

Their lens no longer focus correctly

Why do people over 55 need glasses?

Chemoreceptors

Taste and odor receptors are examples of?

Increased heart rate

Activation of the sympathetic nervous system causes

Positive

An action potential means that the membrane potential has become....

Visual and vestibular/equilibrium

Motion sickness is caused by the contradiction of which two senses?

Schwann cell

Glial cell that covers the axon in the PNS

Why are action potentials conducted in only one direction along an axon?

The brief refractory period prevents reopening of voltage-gated Na+ channels

They redirect sound waves in their inner ear to hear better

Most mammals move their pinnae because of what advantage?

Cerebrum

Where in the brain does perception take place

Cerebellum

What part of the brain is responsible for coordination of movement

Hyperpolarization

What occurs when K+ diffuse out of a nerve cell and the inside of the cell becomes more negative than the outside?

Fight-or-flight response

This system's activity increases when you're stressed, in danger or physically active

Help monitor blood pressure

Function of baroreceptors found in the aorta?

Perception

Which step of the sensory pathway helps you form an image in your mind?

Brainstem

Damage to this brain structure is most likely to be fatal

Transduction

If a person's cold receptors no longer convert cold stimuli to sensory signals, that person has a problem with the process of...

Either activation of sleep centers or Increased blood flow to the digestive system

When a rest-and-digest response is activated, what one of many effects will be seen?

Semicircular canal

Detects when you move your head side to side

Hair cells

These cells detect angular acceleration and sound waves