BIO 201L Lab Exam 7 | Score 15/15 | Straighterline

7/24/25, 1:08 PM Lab Exam 7: Attempt review
Lab 7 The Muscular System

Started on Wednesday, 23 July 2025, 6:14 PM
State Finished
Completed on Wednesday, 23 July 2025, 6:16 PM
Time taken 2 mins 46 secs
Grade 15.00 out of 15.00 (100%)




Question 1
The positional change in tropomyosin exposes myosin binding sites on what protein?
Correct

Mark 1.50 out of Select one:
1.50 a. Troponin
b. Myosin Head
c. Adenosine Triphosphate
d. Actin




Question 2
The contractile unit of the muscle fiber is the sarcoplasmic reticulum.
Correct

Mark 1.50 out of Select one:
1.50 a. True
b. False




Question 3
Which of the following is true regarding isotonic and isometric contractions?
Correct

Mark 1.50 out of Select one:
1.50 a. Isotonic contractions occur when muscle tension remains the same as muscle length changes.
b. Isometric contractions occur when the muscle length remains the same as muscle tension increases.
c. Both of the above are true.
d. Neither of the above are true.




Question 4
What is the most common muscle type in the human body?
Correct

Mark 1.50 out of Select one:
1.50 a. Cardiac
b. Skeletal
c. Smooth
d. All muscle types are evenly distributed throughout the body.




Question 5
Depletion of ATP leads to muscle fatigue.
Correct

Mark 1.50 out of Select one:
1.50 a. True
b. False