Biology 225 Sample Final

The trigger zone of a neuron includes

at the distal end of a nerve fiber, action potentials have the same voltage as they had at thte beginning. That is to say they are

when a neuron is depolarized to threshold,

the falling phase of an action potential results from

nerve signals,

One role of the astrocytes is to

what is an example of an effector

the intergrative function of the nervous system is associated especially with

The ____ nervous system carries brain and spinal cord signals to other organs

a neuron fires only when its membrane reaches

During the rising phase of an action potential

The cytoplasm, nucleus, and outer wrapping of plasma mambrane of the schwann cells constitute the

The first thing that occurs when a nerve signal reaches a synaptic knob is

A bipolar neuron has

The regeneration tube of a peripheral nerve fiber consist of

Mature neurons lack centrioles. You would expect these neurons to be unable to

The oligodendrocyte is found in the ___ and functions to

Glial cells which resemble a cubiotal epithelium without the basement membrane and produce CSF are called

Most adult brain tumors are composed of___ cells and cannot be treated by chemotherapy because of the _____.

neurons that send impulses to skeletal muscles have a ____ diameter and are___

What is the correct sequence of voltage-regulated gates opening and closing in an action potential?

the ventral rami of the spinal nerves from nerves plexuses in all regions except

The spinal cord ends at about which vertebrae?

Nerves in the pelvic region and lower limbs arise from an area of the spinal cord called the ____ enlargement

A bundle of nerve roots that occupy the canal of the vertebrae L2 to S5 are called the

Spinal cord injuries commonly result from fractures of vertebraes C5 to C6, but never from fractures of L3 to L5. This is because vertebrae C5 to C6

The innermost meninx around the spinal cord is called the___ and extends beyond the medullary cone as the___

The ventral root carries ____ neurons, while the dorsal root carries ____ neurons.

Anesthetics and anti-inflammitory drugs are introduced into this space in the spinal cord

individuals with parkinsons disease do not produce enough dopamine. Injections of dopamine do not help either. This is because?

Two cranial nerves involved in taste are

The white matter of the cerebellum constitutes its

Almost all sensory signals pass through the ___ on the way to the cerebrum

_____ connect one gyrus to another within the same cerebral hemisphere

The ____ contains nuclei that control coouching, sneezing, swallowing, and vomiting

The brain center most concerned with emotion is

Which of the following nerve endings are not found in the skin?

The loudness of a sound is correlated with the ___ of the sound wave

Other than the optic disc, the only point where the retina is attached to the rest of the eyeball is an anterior ring called

When the stapes pushes in and creates pressure on the endolymph, the ___ bulges out to relieve the pressure

The sensory cells of hearing are stimulated by the ___ resting on their stereocilia

We sense rotary movements of the head when the endolymph pushes on a gelatinous cap called the ___ on a semicircular duct

What is part of the fibrous tunic of the eye?

The blind spot in each visual field is a region in which

The footplate of the stapes covers an opening called

Suppose you are sitting in a rotating chair in a hair salon with your eyes closed, and the chair was rotated. you could sense this by means of your

The function of the suspensory ligaments is to

Tate buds are found on all the lingual papillae except for the ___ type.

The ___ is attached to the medial side of the typanic membrane.

The ____ nervous system carries brain and spinal cord signals to other organs

The corpus callosum is composed of

cerebrospianl fluid serves what functions

The primary somesthetic cortex monitors which senses

The cerebrum and cerebellum contains thick folds or ridges called___ whose purpose is to____.

the second largest region of the brain is the___, whose function is to____.

The neurons and all glial cells except microglia are derived from embryonic tissue called ___ that thickens to form a structure called the ____ in the third week of embyronic development.

the lumen of the neural tube develops into the

The outer double meningeal layer around the brain is called the _____, and in some places the two layers are seperated by the ___

the trigger zone of a neuron indludes

the symptoms of ___ are high fever, stiff neck, drowziness, and intense headache

a network of capillaries in the brain that produce CSF is called the ___ and is surrounded y glial cells called _____.

The blood brain barrier is most permeable to which chemicals

Neurons that send impulses to skeletal muscles have a ___ diameter and are ___.

In this disorder, oligodendrocytes and myelin sheaths of the CNS deteriorate and are replaced by hardend scar tissue

Damaged neurons in the PNS can regenerate if their ___ is in tact and they can form a ____.

which sensory funciton involves neurons in the dorsal root ganglia?

The cerebellum develops from the embryonic

What is most concered with motor coordination and equilibrium?

Which lobe of the cerebrum is most concered with vision

CSF returns to the bloodstream by way of

Damage to the temporal lobe would most likely cause the individual to be unable to

What is under dual control of the ANS

This group of nerves does not come from the brian or spinal cord

Most parasympathetic fibers reach their target organs by way of

The ___ system is characterized by long preganglionic and short postganglionic fibers

What is not controlled by the autonomic nervous system

in response to high blood pressure, stretch receptors called ___ in the walls of the arteries carrying blood to the heart will cause the heart to ___ its beats per minute.

The system that stimuates normal conditions in the body such as lowered heart rate, and increased gastrointestional activites such as digestion, secretion, and defecation is the

The somas of somatic motor neurons are found in the __ of the spinal cord, while the somas of preganglionic neurons of the sympathetic division are found in the ___ of the spinal cord.

In the ANS the preganglionic neuron releases ___, while the postganglionic neuron releases ___

All receptors for ___ are confined to the head and are innervated by cranial nerves

The receptors for taste are located on

these cells are the only neurons in the body exposed to the external environment, and unlike most neurons, they are replaceable.

the aqueous humor is secreted by the ___ and reabsorbed into the ____.

What is most concerned with motor coordination and equilibrium?