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GMS 6474 FINAL EXAM STUDY MATERIALS QUESTION AND ANSWERS (VERIFIED ANSWERS)
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GMS 6474 FINAL EXAM STUDY MATERIALS QUESTION AND ANSWERS (VERIFIED ANSWERS)
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ESTUDYGMS 6474 FINAL EXAM STUDY MATERIALS QUESTION
AND ANSWERS (VERIFIED ANSWERS)
1. **What does the sarcoplasmic reticulum (SR) store?**
- A. Glucose and proteins
- B. Proteins and calcium
- C. ATP and oxygen
- D. Sodium and potassium
**- ANSWER: B**
2. **What is the role of the transverse tubules in the muscle fiber?**
- A. To store calcium
- B. To allow communication between the inside of the muscle and the outside
- C. To anchor the myofilaments
- D. To regulate blood flow
**- ANSWER: B**
3. **How is a sarcomere measured?**
- A. From the M line to the H zone
- B. From the A band to the I band
- C. From Z-disc to Z-disc
- D. From the H zone to the I band
,ESTUDY
**- ANSWER: C**
4. **What is contained in the I band of the sarcomere and what color is the band?**
- A. Thick filaments; dark (anisotropic)
- B. Thin filaments, titin, Z-disc; light (isotropic)
- C. Thick filaments, Z-disc; dark (isotropic)
- D. Myomesin, titin, M line; light (anisotropic)
**- ANSWER: B**
5. **What is contained in the A band of the sarcomere and what color is the band?**
- A. Thin filaments, titin; light (isotropic)
- B. Thick and thin filaments; dark (scatters light)
- C. Thick filaments, M line; light (anisotropic)
- D. Thin filaments, Z-disc; dark (isotropic)
**- ANSWER: B**
6. **What is contained in the H zone and what color is the band?**
- A. Thick filaments, light
- B. Thin filaments, dark
- C. Thick and thin filaments, light
- D. Myomesin, dark
**- ANSWER: A**
,ESTUDY
7. **What is contained in the M line?**
- A. Thin filaments
- B. Myomesin, thick filaments, middle of H zone
- C. Titin, thin filaments
- D. Z-disc, thick filaments
**- ANSWER: B**
8. **What does titin do in the sarcomere?**
- A. Anchors thin filaments to Z-disc
- B. Structural protein
- C. Regulates calcium levels
- D. Binds actin and myosin
**- ANSWER: B**
9. **How many zones can you see when the sarcomere is relaxed?**
- A. Only the I band and H zone
- B. Only the A band
- C. All zones
- D. Only the M line
**- ANSWER: C**
, ESTUDY
10. **How many zones can be seen when the sarcomere is contracted?**
- A. All zones are visible
- B. I band shortens, H zone disappears, thick and thin filaments overlap
- C. The A band shortens
- D. The I band and H zone increase in size
**- ANSWER: B**
11. **What is the contractile unit of skeletal muscle?**
- A. The myofibril
- B. The myofilament
- C. The sarcomere
- D. The muscle fiber
**- ANSWER: C**
12. **What is the main component of the thick filaments?**
- A. Actin
- B. Troponin
- C. Tropomyosin
- D. Myosin
**- ANSWER: D**
13. **What is the largest protein in the body?**
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