Table of contents

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
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 Blood3h 22m
18. The Heart3h 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 Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

10. Muscles

Origin and Insertion

Anatomy & Physiology

10. Muscles

Origin and Insertion

Previous problemNext problem

3:26 minutes

Problem 29

Textbook Question

Mary sees Jill coming toward her and immediately contracts her frontalis and procerus. She also contracts her right levator labii. Is Mary glad to see Jill? How can you tell?

Verified step by step guidance

Step 1: Understand the muscles involved in the problem. The frontalis muscle is responsible for raising the eyebrows, the procerus muscle is involved in pulling the skin between the eyebrows downward (creating a frown or furrow), and the levator labii superioris elevates the upper lip.

Step 2: Analyze the actions of these muscles. Contracting the frontalis muscle typically indicates surprise or excitement, while contracting the procerus muscle suggests a frown or displeasure. The levator labii superioris elevates the upper lip, which can be associated with expressions of happiness or a smile.

Step 3: Consider the combination of muscle actions. Mary is contracting both the frontalis and procerus muscles simultaneously, which could indicate mixed emotions. However, the contraction of the levator labii superioris on the right side suggests a partial smile, which might indicate positive feelings.

Step 4: Evaluate the context of the facial expression. Facial expressions are often a combination of muscle movements that convey emotions. The presence of a smile (even partial) combined with raised eyebrows may suggest that Mary is glad to see Jill, despite the involvement of the procerus muscle.

Step 5: Conclude based on the evidence. While the contraction of the procerus muscle might initially seem contradictory, the overall combination of muscle actions (especially the levator labii superioris and frontalis) leans toward Mary being glad to see Jill. Facial expressions are complex and can convey nuanced emotions.

Verified video answer for a similar problem:

This video solution was recommended by our tutors as helpful for the problem above

Video duration:

Play a video:

Was this helpful?

Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Facial Expressions and Emotions

Facial expressions are key indicators of emotional states. The frontalis muscle raises the eyebrows, often associated with surprise or happiness, while the procerus can indicate frowning or concern. The levator labii elevates the upper lip, which can signal a positive emotional response. Understanding these expressions helps in interpreting Mary's feelings toward Jill.

Nonverbal Communication

Nonverbal communication encompasses all forms of communication that do not involve words, including facial expressions, body language, and gestures. It plays a crucial role in conveying emotions and intentions. In this scenario, Mary's facial muscle contractions serve as nonverbal cues that can suggest her emotional state and attitude toward Jill.

Contextual Interpretation

Contextual interpretation involves analyzing the surrounding circumstances and environment to understand behavior and emotions accurately. In this case, the context of Mary seeing Jill and her immediate facial reactions provides insight into her feelings. Recognizing the social dynamics and previous interactions can further clarify whether her expressions indicate gladness or another emotion.

Watch next

Master Origin and Insertion with a bite sized video explanation from Bruce Bryan

Start learning

Related Videos

Related Practice

Textbook Question

Elongated bursae that reduce friction and surround the tendons that cross the posterior and anterior surfaces of the wrist form___.

493

views

Textbook Question

Assume you have a 10-lb weight in your right hand. Explain why it is easier to flex the right elbow when your forearm is supinated than when it is pronated.

498

views

Textbook Question

Mr. Ahmadi, an out-of-shape 45-year-old man, was advised by his physician to lose weight and to exercise on a regular basis. He followed his diet faithfully and began to jog daily. One day, while on his morning jog, he heard a snapping sound that was immediately followed by a severe pain in his right lower calf. When his leg was examined, a gap was seen between his swollen upper calf region and his heel, and he was unable to plantar flex that ankle. What do you think happened? Why was the upper part of his calf swollen?

588

views

Textbook Question

What class of lever system do the following activities describe?

a. The soleus muscle plantar flexes the foot.

b. The triceps brachii is strained while doing pushups.

568

views

Textbook Question

While unloading her car trunk, Amy strains a muscle and as a result has difficulty moving her arm. The doctor in the emergency room tells her that she strained her pectoralis major. Amy tells you that she thought the pectoralis major was a chest muscle and doesn't understand what that has to do with her arm. What should you tell her?

449

views

Textbook Question

Which eye muscle passes through the trochlea and turns the eye inferiorly and laterally?

a. Lateral rectus muscle

b. Inferior rectus muscle

c. Inferior oblique muscle

d. Superior oblique muscle

478

views

Textbook Question

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