Muscle Tissue

Question 1

Characteristics and overall functions of muscle tissue

Answer 1

Capable of contraction and relaxation. It functions to produce movement, maintain posture, support, guard exits/entrances (e.g. sphincter), and maintain body temperature.

Question 2

_____________ muscle is attached to skeleton, is striated, voluntary and causes body movement.

____________ muscle is heart muscle, is striated with intercalated discs, is involuntary and causes heart pumping.

____________muscle is found in the wall of tubular viscera and is not striated, is involuntary and causes mixing & movement called peristalsis.

Answer 2

Skeletal
Cardiac
Smooth

Question 3

Connective tissue around groups of muscles or filling spaces is _____________.

________________ is connective tissue around a single muscle
____________
is connective tissue around fascicles
__________ are bundles of muscle cells
__________ connective tissue cord attaching muscle to (periosteum of) bone, aponeurosis is a broad sheet-like tendon.

Answer 3

Fascia
Epimysium
Perimysium
Fascicles
Tendon

Question 4

Skeletal muscle must have nerve supply to function and has an excellent blood supply. T or F?

Answer 4

T

Question 5

_____________: occurs when many muscle cells or motor units contract at the same time making a bigger whole muscle contraction

Answer 5

Multiple motor unit summation

Question 6

__________________: when muscle cells contract repeatedly and rapidly, so that the next contraction is occurring before the previous one has totally relaxed. Examples include incomplete tetanus (repeated contraction due to repeated stimuli with a little bit of contraction between each stimulus) and complete tetanus (sustained contraction with no relaxation).

Answer 6

Temporal summation

Question 7

_____________: the bigger muscle twitch that is achieved upon warming up for exercise.

Answer 7

Treppe

Question 8

________________: when not all muscle cells are working at the same time so that some can rest while others are contracting. This allows posture muscles to be contracted all day without tiring, because the motor units take turns.

Answer 8

Asynchronous motor unit summation

Question 9

________________: is when some of the motor units are contracting making the muscle firm, but not enough are contracting to result in movement.

Answer 9

Muscle tone

Question 10

____________ contractions occur when you pick up something that is too heavy. While your muscle is working and creating tension, it is not shortening.
___________ contractions result in shortening, as in bending your elbow.

Answer 10

Isometric

Isotonic

Question 11

___________ fibers are fatigue resistant and are red. They have excellent blood supply and myoglobin for oxygen storage (think of dark meat of chicken). Therefore they are geared toward aerobic metabolism and while this is not fast these fibers do not run out of ATP and do not fatigue (think of the chicken walking around all day long)

Answer 11

Slow

Question 12

____________ fibers are fatiguable and are white. They do not have great blood supply and do not have myoglobin. They are geared toward anaerobic metabolism. They can make the ATP very quickly (think of the breast meat of chicken and the chicken flying quickly to a tree when being chased) but will run out of it soon and cannot endure (the chicken cannot fly long distances, but the goose has dark meat for the breast, why?).

Answer 12

Fast

Question 13

___________ are more fatigue-resistant fast fibers. You can get these through endurance training, but the fast and slow fibers are genetically determined.

Answer 13

Intermediate fibers