Identify and describe the function of each of the components of a spinal reflex arc.
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Question 2) In comparison to skeletal muscle fibers, the contractile fibers of the heart are depolarized for _____ period of time.
a) a shorter
b) a longer
c) the same
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Question 3) In 1848, a railroad worker named Phineas Gage was seriously injured during an explosion on the job
A tapered metal rod ranging from 0.25 inches to 1.25 inches in diameter and over 3 feet long entered his skull just under his left cheek bone and exited through the top of his skull. The rod was found over twenty feet away. Amazingly, Gage lived even though he suffered massive damage to the left front of his brain. His personality and intellectual abilities changed, however. Before the accident, he was respected as a smart, capable and even-tempered man. After the accident, he was foul-mouthed and bad-tempered and could not make up his mind. In the years immediately preceding his death, he began to have epileptic seizures. Explain the changes observed in Mr. Gage based on your knowledge of the brain.
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Question 4) Which area of the myogram shows sustained contraction with partial relaxation?
a) A
b) B
c) C
d) D
e) none of these choices
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Question 5) Which of the following selections correctly lists the sequence of events that occur during intramembranous ossification?
a) Ossification center develops > Calcification > Formation of trabeculae > Development of new periosteum.
b) Calcification > Ossification center develops > Formation of trabeculae > Development of new periosteum.
c) Ossification center develops > Formation of trabeculae > Calcification > Development of new periosteum.
d) Development of new periosteum > Ossification center develops > Calcification > Formation of trabeculae.
e) Ossification center develops > Calcification > Development of new periosteum > Formation of trabeculae.
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Question 6) Which portion of the peritoneum attaches the liver to the anterior abdominal wall and diaphragm?
a) Greater omentum
b) Falciform ligament
c) Lesser omentum
d) Mesentery
e) Mesocolon
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Question 7) What is the origin of the muscle labeled D?
a) fascia over parotid gland
b) fascia over deltoid and pectoralis muscles
c) skin of the lower lip
d) epicranial aponeurosis
e) mandible
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Question 8) Compare and contrast the male and female pelvis.
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Question 9) When B and T cells are fully developed and mature, they are described as being
a) Immunocompetent
b) Pluripotent stem cells
c) Primary lymphatic cells
d) Specifically promoted
e) Germ cells
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Question 10) A patient with chronic skeletal muscle spasms was placed on an anticholinergic medication
After taking the medication, the patient's muscle spasms ceased, but now the patient reports a loss of muscle strength. In addition, the patient's resting heart rate has increased. Explain the effects of the medication the patient received.
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