Muscles

Question 1

what does syncytium mean in relation to cardiac muscle

Answer 1

when one cell contracts they all contract. The heart also has automaticity and autorythmicity

Question 2

What shape is smooth muscle?

Answer 2

fusiform

Question 3

What functions of skeletal muscle?

Answer 3

Producitng movement. Producing Heat, Posture/ stabilzing body position.

Question 4

What are functions of smooth muscle?

Answer 4

Movement of substances throughout the body, regulations oregano volume.

Question 5

What are the properties of Muscle tissues?

Answer 5

Exitability, Conductivity, Contractillty, Extensibility, Elasticitcity

Question 6

What kind of muscle can be extended a lot without wakening the muscle

Answer 6

smooth muscle

Question 7

What is the functional unit of the muscle?

Answer 7

The sarcomere

Question 8

What is the sarcolemma?

Answer 8

Cell membrane of a muscle

Question 9

What s a group of muscle fibers together?

Answer 9

a fascicle

Question 10

What structure surrounding each sarcolemma is composite of areolar connective tissue?

Answer 10

Endomysium

Question 11

What structure surround each fascicle and what tissue type is it composed of

Answer 11

Perimysium, areolar connective tissue

Question 12

What is the difference between a direct and indirect tendon

Answer 12

Indirect muscles have a tendon that connects to the bone. In a direct muscle the fascia of the muscle weaves directly into the periosteum

Question 13

Connective tissues of muscles collectively form what, and what are their functions

Answer 13

Series elastic elements. Functions are to add power and return muscles to their resting lengths

Question 14

What is another name for superficial fascia of muscle?

Answer 14

The hypodermic

Question 15

What is are developmental precursors for muscle fibers and what are the cells that assist in their assembly?

Answer 15

Myoblasts, and satellite cells.

Question 16

What is the oxygen carrying molecule of muscles

Answer 16

Myoglobin

Question 17

What are the function of transverse tubules

Answer 17

The quickly move the electrical impulse throughout the cell

Question 18

What does the Sarcoplasmic Reticulum do?

Answer 18

Acts as a storage point for calcium?

Question 19

What is Nebulan?

Answer 19

A protein that attaches the actin to the Z disc

Question 20

What are the two contractile proteins in a sarcomere?

Answer 20

Myosin and actin

Question 21

What protein holds the myosin.

Answer 21

Myomesin

Question 22

What is the function of Dystrophin?

Answer 22

Attach the contractile elements to the cell membrane

Question 23

What are the regulatory proteins of the sacromere?

Answer 23

Tropomyosin and troponin

Question 24

What is a motor unit?

Answer 24

a motor neuron and muscles fibers that it enervates

Question 25

Where does calcium bind in a sacromere?

Answer 25

at the Troponin

Question 26

Which regulatory protein prevents the myacin heads from binding to the actin active sites, and how many heads does each molecule cover

Answer 26

Tropomyacin, 6-7 g-actin

Question 27

What protein is at the center of the m-line

Answer 27

Myomesin

Question 28

How many strands make up actin and what are the subunits called?

Answer 28

Two strands mad of G-action (globular)

Question 29

What is the traveling action potential called?

Answer 29

A nerve impulse

Question 30

What is the absolute refractory period?

Answer 30

Nothing can start another Action potential until the sodium gates res et to baseline

Question 31

What is the relative refractory period?

Answer 31

The time during which the sodium gate have reset but the potassium gates are still open

Question 32

What is another name for spongy bone as a whole and one for the bone portion of the spongy bone

Answer 32

Spongy bone can be called dipole the bone portion is Trabeculae

Question 33

What is the bone marrow cavity in a long bone called?

Answer 33

Medullary cavity