Mods9

Question 1

Which of the following descriptions characterizes skeletal muscle tissue?

Answer 1

It contains striations

Question 2

What is the functional unit of muscle contraction?

Answer 2

sarcomere

Question 3

Which of the following is not a general function of muscle tissue?

Movement
Protection
Heat Production
Posture

Answer 3

Protection

Question 4

The skeletal muscle fiber characteristic of excitability directly results in these cells being capable of….

responding to nerve signals
shortening
returning to resting length after contracting
producing heat

Answer 4

responding to nerve signals

Question 5

I. Muscles
A. Special Characteristics
B. Main functions
II. Types of Muscles
1. Skeletal Muscles
2. Cardiac muscles
3. Smooth muscles
III. Gross Anatomy of a Skeletal Muscle
- Nerve and Blood Supply
- Connective Tissue Sheaths
- Microscopic Structure and Function

Answer 5

ok ok ok overview

Question 6

These are elongated, and are called muscle fibers.

Answer 6

Skeletal and smooth muscle(but not cardiac muscle cells)

Question 7

prefixes myo or mys are word roots meaning?

Answer 7

muscle

Question 8

it is referenced as muscle

Answer 8

Sarco(flesh)

Question 9

Plasma membrane of muscle cells

Answer 9

sarcolemma

Question 10

muscle=

Answer 10

sarco

Question 11

husk=

Answer 11

lemma

Question 12

muscle cell cytoplasm is called

Answer 12

sarcoplasm

Question 13

What are the special characteristics of muscle tissue? (4) E C E E

Answer 13

Excitability
Contractility
Extensibility
Elasticity

Question 14

• responsiveness
• the ability of a cell to receive and respond to a stimulus by changing its membrane potential
• in the case of muscle, the stimulus is usually a chemical like (neurotransmitter) released a nerve cell.

Answer 14

Excitability

Question 15

• shorten forcibly
• this ability sets muscle apart from all other tissue types

Answer 15

Contractility

Question 16

• extend or stretch
• muscle cells shorten when contracting, but can be stretched beyond their resting length, when relaxed.

Answer 16

Extensibility

Question 17

• recoil
• and resume its resting length after stretching

Answer 17

Elasticity

Question 18

B. Main Functions (of Muscle Tissue) P M S G

Answer 18

Produce movement
Maintain posture and body position
Stabilize joints
Generate heat

Question 19

• responsible for all locomotion and manipulation
• enable you to quickly jump, direct your eyes, and smile or frown
• Blood courses through your body
• Smooth muscle in organs of the digestive, urinary, and reproductive tracts substances through the organs and along the tract

Answer 19

Produce movements

Question 20

-…. Maintain body posture
-… Making one tiny adjustment after another to counteract the never-ending downward pull of gravity

Answer 20

Maintain posture and body position

Question 21

Pull on bones to cause movement

Answer 21

Stabilize joints

Question 22

• Muscle generate heat as they contract
• plays role in maintaining normal body temperature

Answer 22

Generate heat

Question 23

II. Types of Skeletal Muscles? (3) S C S

Answer 23

Skeletal muscle
Cardiac Muscle
Smooth muscle

Question 24

____________
- organs that attach and cover skeleton
- ____ ___ ____ are the longest muscle cells and have obvious stripes called ______.
- Called _____ muscle because it is the only type subject to conscious control
- responsible for overall body _____
- it can contract rapidly, but tires easily and must rest after short periods of activity
- words to keep in mind: ____ _____ ______ (3)

Answer 24

Skeletal Muscle
- skeletal muscles
- skeletal muscle fibers, striations
- voluntary
- mobility
-
- skeletal, striated, voluntary

Question 25

______ - occurs only in the heart - it's not voluntary (it can and does contract without being stimulated by the nervous system). We have no subconscious control over it. - contracts fairly _____ rate by the heart's peacemaker - keywords to remember: ___ ____ ____(3)

Answer 25

Cardiac muscle - cardiac muscle - ^ - steady - cardiac, striated, voluntary

Question 26

______ - found in the walls of hollow visceral organs (stomach, urinary bladder, respiratory passages) - its role is to force fluids - also forms valves tor regulate the passage of substances... - has elongated cells, BUT no striations - key words: __ ___ __(3)

Answer 26

visceral, nonstriated, involuntary

Question 27

Nerve and Blood supply - has __ nerve, __ artery, and ___ or ___ veins serve each muscle.

Answer 27

1, 1, 1 or more

Question 28

- Has several connective tissue sheaths - these sheaths support each cell and reinforce and hold together the muscle

Answer 28

Connective tissue sheaths

Question 29

"outside the muscle"

Answer 29

Epimysium

Question 30

- is an overcoat of dense irregular connective tissue that surrounds the whole muscle - sometimes it blends with the deep fascia

Answer 30

epimysium

Question 31

the muscle fibers are grouped into fascicles

Answer 31

Perimysium and fascicles

Question 32

Surrounding each fascicle is a layer of dense irregular connective tissue called _____.

Answer 32

Perimysium

Question 33

"Around the muscle"

Answer 33

perimysium

Question 34

"within the muscle"

Answer 34

endomysium

Question 35

is a wispy sheath of connective tissue that surrounds each individual muscle fiber. It consists of fine areolar connective tissue

Answer 35

Endomysium

Question 36

cordlike extension of the preceding three linings. It extends beyond the muscle tissue to connect the muscle to a bone or to other muscles.

Answer 36

tendon

Question 37

- contractile cells

Answer 37

Microscopic structure and function

Question 38

- contractile cells are called ____; connective tissue holds muscle fibers..

Answer 38

muscle fibers

Question 39

- fibers of cytoskeleton form cylinders that contain ___ _____ (containing _____) and ____ ____ (containing mainly ___)

Answer 39

thick myofilaments, myosin thin myofilaments, actin

Question 40

Basic functional (contractile) unit called

Answer 40

sarcomere

Question 41

- sarcmeres separated from each other by dark bands called=

Answer 41

z lines