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Flashcards in Muscle Test Deck (36)
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1
Q

A skeletal muscle is separated from adjacent skeletal muscles and kept in place by layers of dense connective tissue

A

Fascia

2
Q

Connective tissue that attaches muscle of the periosteum

A

Tendons

3
Q

Bundles of muscle fibers

A

Fascicles

4
Q

Each bundle is covered by layers of connective tissue

A

Endomysium

5
Q

The connective tissue that penetrates and divides the individual muscles into compartments

A

Perimysium

6
Q

The characteristic striated appearance of skeletal muscle is due to the arrangement of alternating protein filaments composed of ______ and ______.

A

Actin and myosin

7
Q

The units that form the repeating pattern along each muscle fiber is called

A

Sarcomeres

8
Q

The union between a nerve fiber and a muscle fiber is the

A

Neuromuscular junction

9
Q

Connection of skeletal muscle is made possible by ________ in the synaptic cleft

A

Motor end plate

10
Q

The substance used by motor neurons to transmit stimuli to skeletal muscle

A

Acetylcholine/Neurotransmitter

11
Q

When the filaments of actin and myosin side past each other in the myofibril, the result is

A

Muscle contraction

12
Q

The substance stored in large quantities in muscle that can store oxygen is

A

Myoglobin

13
Q

The substance that halts stimulation of muscle tissue is

A

Cholinesterase

14
Q

Muscle tissue is a major source of

A

Heat

15
Q

The finer and more precise the movement produced by a particular muscle, the (fewer/greater) the number of muscle fibers in the motor unit

A

Fewer

16
Q

Two types of smooth muscle are _______ muscle and _______ muscle

A

Visceral and Multiunit

17
Q

The all-or-none response means

A

A muscle will have a complete or no contraction

18
Q

What is included in a motor unit

A

Several muscle fibers and a motor neuron

19
Q

The increase in the number of motor units is activated when the intensity of stimulation increases is called

A

Recruitment

20
Q

The pigment responsible for the reddish-brown color of skeletal muscles is called

A

Myoglobin

21
Q

Muscle fatigue is most likely due to an accumulation of

A

Latic acid

22
Q

The lag between the time a muscle is stimulation and the beginning of its response is called

A

Latent period

23
Q

This is the connection between the myosin and the actin myofibrils during muscle contraction

A

Cross-bridges

24
Q

Chemical substances stored in vesicles of motor neurons which cause muscle contractions when released in the presence of Ca++ are

A

Acetylcholine

25
Q

The substance that accumulates in muscles working without enough oxygen is called

A

Latic acid

26
Q

The ion that must be released into muscle cells before contractions is called

A

Calcium

27
Q

This is the immediate source of energy contractions is called

A

ATP

28
Q

This is the compound the stores oxygen in muscle cells

A

Myoglobin

29
Q

The muscle that produces a given movement is called the ________ _________

A

Prime mover

30
Q

The muscle attachment point on the stationary body part is called

A

Origin

31
Q

The muscle attachment point on the moving body part is called

A

Insertion

32
Q

The muscle that must relax during a given movement is called the _______

A

Antagonist

33
Q

Muscles enter into oxygen debt are functioning _________

A

Anaerobically

34
Q

Which myofibril is dark in color with in a skeletal muscle

A

Myosin

35
Q

Which myofibril is light in color with in a skeletal muscle

A

Actin

36
Q

The connective toss that attaches a muscle to a bone is called

A

Tendon