Muscles

Question 1

What are the three types of muscle?

Answer 1

Skeletal, cardiac, smooth

Question 2

Which type of muscle moves joints by strong and rapid contractions?

Answer 2

Skeletal muscle

Question 3

Which two types of muscles are involuntary?

Answer 3

Cardiac and Smooth Muscle

Question 4

What type of nucleus does a skeletal muscle have?

Answer 4

Multinucleated

Question 5

What type of nucleus does a cardiac muscle have?

Answer 5

Single central nucleus often branched

Question 6

What type of nucleus does a smooth muscle have?

Answer 6

Single central nucleus

Question 7

What type of junction do cardiac muscles contain?

Answer 7

Gap junctions, adherens junctions, desmosomes

Question 8

What type of muscles are tightly connected by specialized junctions?

Answer 8

Cardiac muscle

Question 9

What shape are smooth muscles?

Answer 9

Spindle shaped

Question 10

Where are smooth muscles found?

Answer 10

Found in walls of most blood vessels and tubular organs

Question 11

What is the function of gap junctions?

Answer 11

Allow cells to be electrically coupled, so that they beat in synchrony

Question 12

What is a static bone?

Answer 12

Point of origin of muscle connection

Question 13

What is a moving bone?

Answer 13

The point ofinsertion of a muscle connection

Question 14

What is an antagonistic pair?

Answer 14

when one contracts, the other relaxes to enable opposing movements

Question 15

Examples of opposing movements

Answer 15

Flexion versus extension
Abduction vs adduction
Protraction vs retraction

Question 16

What are flexor muscles?

Answer 16

Any of the muscles that decrease the angle between the two sides of a joint

Question 17

Example of flexor muscle

Answer 17

bending the elbow or knee

Question 18

What is an extensor?

Answer 18

Any of the muscles that increase the angle between two sides of a joint

Question 19

Example of extensor

Answer 19

Straightening the elbow or knee

Question 20

What are the 3 parts of the jointed exoskeleton of the hind leg?

Answer 20

Femur, tibia, tarsus

Question 21

What are the 2 antagonistic muscles that connect an insect leg’s femur and tibia?

Answer 21

flexor tibiae muscle and extensor tibiae muscle

Question 22

What happens when the flexor muscle contracts and the extensor muscle relaxes?

Answer 22

the tibia and femur are brought closer together

Question 23

What happens when the extensor muscle contracts and the flexor muscle relaxes?

Answer 23

the tibia is pushed away from the femur