Table of contents

1. Introduction to Anatomy & Physiology5h 40m
2. Cell Chemistry & Cell Components12h 37m
3. Energy & Cell Processes10h 7m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood1h 22m
18. The Heart1h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance Coming soon
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity Coming soon

13. The Peripheral Nervous System

Organization of Sensory Pathways

Anatomy & Physiology

13. The Peripheral Nervous System

Organization of Sensory Pathways

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Multiple Choice

How does the strength of a sensory stimulus affect the generator potential in sensory receptors?

Stronger stimuli result in smaller generator potentials.

The strength of a stimulus is correlated with the strength of the receptor potential.

Stronger stimuli result in larger generator potentials.

Generator potentials are not influenced by stimulus strength, just by the presence of a stimulus.

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Related Practice

Textbook Question

Mark the following statements about the spinal cord as true or false. If a statement is false, correct it to make a true statement.

e. The corticospinal tracts are the main sensory tracts in the spinal cord.

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Textbook Question

Fill in the blanks: The tracts of the posterior columns decussate in the_____, whereas the tracts of the anterolateral system decussate in the _____.

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Textbook Question

Which of the following statements is false?

a. The spinothalamic tracts are part of the anterolateral system.

b. Pain, temperature, and crude touch stimuli are carried by the anterolateral system.

c. Descending pathways from the brain and spinal cord can make the spinal cord less receptive to pain stimuli.

d. The thalamus serves as the 'gateway' for entry of all special sensory stimuli into the cerebral cortex, with the exception of audition (hearing).

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Textbook Question

Label the following components of the corticospinal tracts with numbers 1 through 6, with 1 being the origin of the tracts and 6 their destination.

_____Medullary pyramids where most fibers decussate.

_____Anterior horn of the spinal gray matter.

_____Midbrain and pons.

_____Upper motor neurons in the primary motor and premotor cortices.

_____Corona radiata and internal capsule.

_____Lateral funiculus of the spinal cord.

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Textbook Question

Which of the following somatic sensations is not carried by the posterior columns?

a. Tactile senses

b. Temperature

c. Proprioception

d. Stretch

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Textbook Question

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

a. The somatic sensory division of the PNS detects sensory stimuli from the organs in the thoracic and abdominopelvic cavities.

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Textbook Question

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

b. The somatic motor division of the PNS consists of lower motor neurons that directly innervate skeletal muscle fibers.

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Textbook Question

Why is visceral pain often perceived as cutaneous pain?

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Textbook Question

How do upper and lower motor neurons differ?

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Textbook Question

List and describe the basic steps involved in producing movement, beginning with the upper motor neurons in the cerebral cortex.

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Textbook Question

The lower motor neurons that innervate contractile skeletal muscle fibers are called:

a. α-motor neurons.

b. β-motor neurons.

c. upper motor neurons.

d. γ-motor neurons.

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Textbook Question

Explain why you lose both motor and sensory function of a part of your body when a spinal nerve is numbed with anesthetic agents.

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Textbook Question

When Mr. Williams goes to the emergency department with pain in the area along the midline of the diaphragm, he worries he is having a heart attack. Could the pain be related to his heart? Could it be related to any other organ(s)? Explain.

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Textbook Question

What are the three major somatic sensory pathways and their functions?

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Multiple Choice

Spatial discrimination is the ability to distinguish between and precisely identify two or more stimuli. In terms of touch, which of these body parts do you think would have the lowest degree of spatial discrimination?

All spinal nerves are mixed nerves.

At the perceptual level, the ability to differentiate the submodalities of a sensation is known as __________.

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