Anatomy Exam 4 part 2

Question 1

What is a nerve plexus?

give an example

Answer 1

A nerve plexus is a collection of spinal nerves that fuse together to give better control to regional muscles.

Example: Cervical plexus, Solar plexus

Question 2

What is a spinal nerve reflex?

Answer 2

An automatic unconscious reaction to a stimuli

Question 3

What are the basic components of any reflex

Answer 3

1. Sensory receptor/neuron
2. inter-neuron
3. Effector

Question 4

What events take place in the patellae reflex

Answer 4

1. Sensory Neuron
2. Motor Neuron
3. Quadriceps Muscle Contracts (Effector)

Question 5

Why are crossed extender reflexes important?

Answer 5

So both feet or arms react to cover for the other

Question 6

In which lobe does the primary motor cortex reside.

Answer 6

Frontal

Question 7

What is the ventricular system?

What is the purpose of the choroid plexus tissue?

Answer 7

Both are the producer and reservoir of cerebro-spinal fluid

Question 8

Where are the lateral Ventricles found?

Where are the third and fourth Ventricles found?

Answer 8

Lateral- Thalamus

Third/Fourth- on mid line of cerebellum

Question 9

Excess Ceribro-spinal fluid can be released into the venous system via what structures

Answer 9

Arachnoid granulations

Question 10

Which cranial nerves innervate taste buds for the tongue?

Answer 10

Facial, Glossopharyngeal 7 and 9

Question 11

Which two cranial nerves enter/exit the brain stem at about the same location?

Answer 11

7(Facial) and 8(Auditory) both exit through the Internal auditory meatus

Question 12

What controls the muscles of mastication

HINT: NOT FACIAL

Answer 12

Trigeminal

Question 13

Name the five special scences

Answer 13

Sight
Olfacation
Hearing
Taste
Balance

Question 14

What is a Tonic Receptor?
What is a Phasic Receptor?
When do they activate

Answer 14

Tonic receptor- Active whenever stimulus is present.

Phasic receptor- on present when stimulus changes.

Question 15

What do the following Cerebral Nerves do?
3 Oculomotor
5 Trigeminal
8 Acoustic
9 Glossophalarygeal
10 Vagus
11 Spinal accessory
12 Hypoglossal

Answer 15

3 oculomotor- spin eyes

5 Trigeminal- Muscles of mastication

8 Acoustic- Detects movement through audio of ear keeps balance

9 Glossopharyngeal- Helps swallow

10 Vagus- motor function to smooth muscle in heart, lungs, gut

11 Spinal Accessory- Spinal accessory

12 Hypoglossal- motor only controls muscles of your tongue

Question 16

Name Three locations you would expect to find a proprioceptor(stretch receptor)

Answer 16

1. Muscles
2. Tendons
3. Joint connective tissues