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BIO 2310 - Exam 3 (Muscles) > Quiz Questions > Flashcards

Flashcards in Quiz Questions Deck (27):
1

The muscle fibers are covered by a connective tissue membrane called the:

endomysium

2

The fibrous connective tissue that surrounds the muscle organ and is outside the epimysium and tendon is called the:

fascia

3

The point of attachment that does not move when the muscle contracts is the:

origin

4

The term _____ is used to describe a muscle that directly performs a specific movement.

agonist

5

The central body portion of the muscle is the:

belly

6

Superficial muscles are named according to:

location, function, shape and/or size

7

The occipitofrontalis muscle can be found in the:

face

8

The external and internal oblique muscles can be found in the:

abdominal wall

9

Which of the following muscles are referred to as the “rotator cuff” muscles?

Infraspinatus, supraspinatus, subscapularis, and teres minor

10

Muscles that move the wrist, hand, and fingers can be:

extrinsic or intrinsic.

11

The tendon common to both the gastrocnemius and soleus is called the:

calcaneal

12

The continuous low level of sustained contraction maintained by all skeletal muscles is:

muscle tone

13

1. Which of the following is not a function of muscles?
a. Storage
b. Posture
c. Heat production
d. Movement

storage

14

The muscle’s ability to stretch or extend and to return to its resting length is called:

extensibility

15

The contractile unit of a muscle cell is the:

sacromere

16

This structure allows the electrical signals to travel along the sacrolemma and move deeper into the cell.

transverse tubules

17

The four kinds of protein that make up myofilaments are:

myosin, actin, tropomyosin, and troponin.

18

6. According to the sliding filament theory:
a. actin moves past myosin.
b. myosin moves past actin.
c. tropomyosin moves past actin.
d. troponin moves past myosin.

a. actin moves past myosin.

19

The energy required for muscular contraction is obtained by hydrolysis of:

ATP

20

Anaerobic respiration results in the formation of an incompletely catabolized molecule called:

lactic acid

21

The minimal level of stimulation required to cause a fiber to contract is called the:

threshold stimulus

22

three phases of the twitch contraction are the

latent period, contraction phase, and relaxation phase.

23

Repeated stimulation of muscle in time lessens its excitability and contractibility and may result in:

fatigue

24

12. Muscle tone is maintained by:

negative feedback mechanisms

25

A contraction in which muscle length remains the same but muscle tension increases is called:

an isometric contraction.

26

exercises may cause an increase in muscle size called

hypertrophy

27

The more muscle fibers contracting at the same time, the stronger the contraction of the entire muscle. The number of muscle fibers contracting depends on how many motor units are:

recruited