Muscular System

Question 1

There are two different types of muscle contraction. Name and explain them.

Answer 1

Isotonic-these are contractions that result in movement

Isometric-these are where muscles contract but there is no visible movement.

Question 2

What are the short term effects of physical activity on the muscular system?

Answer 2

.increase in muscle temperature
.increased demand for oxygen
.increased production of carbon dioxide
.Increased production of lactic acid
.muscle fatigue

Question 3

Regular participation in exercise has effects on the muscular system. Name them

Answer 3

Increased strength of muscles
Increased muscle hyper trophy (increased size of muscles)
Increased myoglobin stores

Question 4

Name two antagonistic pairs

Answer 4

Biceps and triceps

Quadriceps and hamstrings

Question 5

What is the role of the gluteal muscles ?

Answer 5

Extension of the leg at the hip

Question 6

Role of gastrocnemius

Answer 6

Pointing toes( plantar flexion of the ankle)-extension at the ankle

Question 7

What is the location of the deltoids and what is its role?

Answer 7

Located at the top of the shoulder and the role is to abduct the arm at the shoulder

Question 8

Trapezius . Location and role

Answer 8

Located upper back, from neck across shoulder. Role is to rotate the scapula toward the spine.

Question 9

Latissimus Dorsi . Location and role.

Answer 9

Located at the side if the back and role is to adduct the upper arm at the shoulder.

Question 10

Pectorals .location and role.

Answer 10

Located at the front of upper chest and role is to adduct the arm at the shoulder

Question 11

Abdominals . Role and location.

Answer 11

Located front of torso below upper chest. Role is flexion of trunk.