Muscle

Question 1

Which type of muscle cell can be described as spindle shaped?

Answer 1

Smooth muscle

Question 2

Which types of muscle are striated?

Answer 2

Cardiac and skeletal

Question 3

Which type of muscle cells are unicellular?

Answer 3

Cardiac and smooth

Question 4

Which type of muscle cells are long, parallel cylinders?

Answer 4

Skeletal muscle

Question 5

Which type of muscle cells can be described at short, branched cylinders?

Answer 5

Cardiac

Question 6

What are the three types of skeletal muscle fibres?

Answer 6

Red, intermediate and white

Question 7

Which type of skeletal muscle fibres are fast twitch?

Answer 7

White muscle fibres

Question 8

What protein is used as a marker of cardiac ischemia?

Answer 8

Troponin

Question 9

When calcium enters the cell to engage contraction, where does it bind?

Answer 9

To the tropomyosin complex on the thin filament

Question 10

In which type of muscle do the T-tubules and Z lines line up?

Answer 10

Cardiac muscle

Question 11

What is the name of the specialised myocardial cells, of which the distal conducting cells, carrying impulses to the ventricular muscle?

Answer 11

Purkinje fibres

Question 12

What cells am I describing?
Large cells with: 
-Abundant glycogen
-Sparse myofilaments
-Extensive gap junction sites
-Very good at conducting action potentials rapidly

Answer 12

Purkinje fibres

Question 13

The H zone of the sarcomere is …… during contraction

Answer 13

Reduced

Question 14

The I band of the sarcomere is ….. during contraction.

Answer 14

Reduced

Question 15

What is the M-line of the sarcomeres?

Answer 15

It is the disc in the middle of the sarcomere and is formed of cross-connecting elements of the cytoskeleton

Question 16

Fasicles are composed of ……. ……

Answer 16

Muscle fibres

Question 17

Muscles is composed of many …….

Answer 17

Fascicles

Question 18

What is the name of the connective tissue that surrounds muscle fibres?

Answer 18

Endomysium

Question 19

Many myofibrils from a ….. …..

Answer 19

Muscle fibre

Question 20

Muscles are connected to bones by …….

Answer 20

Tendons

Question 21

What results in the power stroke?

Answer 21

The release of phosphate

Question 22

What is the name of the modified smooth muscle cells found at the site of wound healing?

Answer 22

Myofibroblasts. They produce collagenous matrix but also contract .

Question 23

Where does the autonomic nervous system release their neurotransmitter on, when stimulating smooth muscle cells?

Answer 23

Varicosites

Question 24

In skeletal muscle which cells undergo mitosis to regenerate tissue?

Answer 24

Satellite cells

Question 25

Which type of muscle is incapable of regeneration?

Answer 25

Cardiac muscle

Question 26

Which type of muscle fully retains their mitotic activity?

Answer 26

Smooth muscle

Question 27

Which type of muscle cells have multiple peripheral nuclei?

Answer 27

Skeletal muscle

Question 28

In skeletal muscle there are distinct myofibrils seen. What about in cardiac muscle?

Answer 28

Myofilaments of actin and myosin form continuous masses in the cytoplasm