What are the three types of specialized cells that can initiate the contraction cycle? Describe in detail the conduction pathway of each. What is the resulting heart rate for each?

NOTE: THIS QUESTION HAS DO TO WITH THE CARDIOVSACULAT SYSTEM AND NOT THE MUSCULAR SYSTEM. THANK YOU

Match the following. Use each answer once.

Secreted by preganglionic parasympathetic fibers.

Secreted by most postganglionic sympathetic fibers.

Connective tissue sheath surrounding the myelin sheath of a neuron

The end of the spinal cord

A. Edoneurium

B. Conus medullaris

C. Norepinephrine (NE)

D. Acetylcholine (ACh)

You are practicing in the public schools; a mother tells you that she would like you to provide therapy for her child who has been diagnosed with tongue thrust. What would you tell her? Describe in detail.

1. Which one of the following lists puts the events below in the correct order?

1. bipolar cells depolarize

2. glutamate release from the photoreceptor cell decreases

3. light strikes photoreceptor cells

4. photoreceptor cells are depolarized

5. photoreceptor cells are hyperpolarized

1,2,3,4,5               b. 2,4,3,5,1          c. 3,4,2,5,1           d. 4,3,5,2,1          e. 5,3,4,1,2

2. A sound wave is headed toward your ear. In which order would the signal travel through the following structures as it traveled to the auditory nerve? The structures, in alphabetical order are: (1) basilar membrane; (2) ear canal; (3) hair cells; (4) malleus, incus & stapes; (5) oval window; (6) pinna; (7) tympanic membrane
   1. 6, 7, 2, 4, 1, 3, 5
   2. 6, 7, 4, 2, 5, 1, 3
   3. 6, 2, 4, 7, 1, 3, 5
   4. 6, 2, 7, 4, 5, 1, 3
   5. 7, 2, 6, 4, 5, 1, 3
   6. 7, 2, 6, 5, 4, 3, 1

3. The series of membrane channels that surrounds and virtually covers each myofibril is the
   1. sarcolemma   b. sarcomere     c. sarcosome      d. sarcoplasmic reticulum             e. sarcoplasm
4. How many motor neurons control a typical skeletal muscle?
   1. zero                       b. exactly one                    c. a few                 d. many
5. What kind of a joint would allow for BOTH flexion and abduction, but not rotation?

a. ball and socket                  b. condylar          c. hinge                d. pivot

12. Which of the following will occur after stimulating a chemically-gated potassium channel located on the cell body of a neuron?

explain the mechanism of action of the nervous system in relation to the bone and muscular zystem

please code using ICD 10, there is more than one code.

Depressed left maxillary sinus fracture, fracture of nasal bridge, left orbital contusion, deep laceration of the middle of the nasal bridge to the left mid cheek. MVA, patient van driver ran a stop sign and collided with a pickup truck .