Questions-20

Twenty Questions
Subject:

Twenty Questions
1 2 3 4 5
6 7 8 9 10
11 12 13 14 15
16 17 18 19 20

1. Hamstrings when the leg is
extended?
The antagonist

2. The most common muscle
contractions are __.
Isotonic

3. Muscles begin to stiffen __
hours after death and reach peak
rigidity in __ hours.
3-4, 12

4. What is the function of
myoglobin?
Carry/store oxygen in the muscle

5. Bundles of muscle cells are __.
Fascicles

6. Give 4 ways muscles are
named and give an example of
each.
Various

7. In flexing the arm, the __ is the
agonist and the __ is the __.
Biceps brachii, triceps brachii, antagonist

8. The period after a muscle has
been stimulated, but before it
reacts is called the __ period.
Latent.

9. What is the refractory period?
The period when the muscle can’t be
stimulated because repolarization is
occurring.

10. The build up of __ __ causes
muscle soreness.
Lactic acid

11. The clavicle is at the __ of the
biceps.
Origin

12. Lactic acid builds up in __
respiration.
Anaerobic.

13. What is the covering of the
fascicle?
Perimysium

14. A muscle cell is a __.
Myofiber

15. _ make up myofibers.
Myofibrils

16. __ make up myofibrils.
Myofilaments

17. The small contractile unit of a
muscle is a __.
Sarcomere

18. The sliding filament theory
explains what?
How the myosin heads pull the actin into the
H zone.

19. What is atrophy?
Hypertrophy?.
Muscle shrinks.
Muscle enlarges

20. What increases in number in
hypertrophy?
The number of myofilaments---not the
number of myofibers!!!