TRUNK/DIAPHRAGM MUSCLES

Question 1

Rectus abdominis

Answer 1

Flexors of trunk

Question 2

Abdominal mm (3 different layers):

Answer 2

2 obliques (external and internal)
1 transverse (deepest)

Question 2

2 obliques (external and internal)

Answer 2

Flexors, lateral flexors, and rotators of trunk

Question 3

Aorta

Answer 3

Arterial blood coming from heart

Question 4

How is the diaphragm innervated?

Answer 4

Innervated by phrenic n (C3-C5 levels of spinal cord)
If damaged (even above), cannot use diaphragm

Question 5

Inferior vena cava

Answer 5

Returns to heart (venous blood)

Question 6

What do all 4 abdominal muscles do?

Answer 6

Can increase intra-abdominal pressure (during defecation, urination, parturition, loud singing, etc)

Question 7

What does the diaphragm separate?

Answer 7

Separates thoracic and abdominal cavities

Question 8

What happens to diaphragm during exhalation phase of respiration?

Answer 8

Relaxation of diaphragm

Question 9

What happens to diaphragm during inhalation phase of respiration?

Answer 9

Contraction of diaphragm
Brings central tendon down to increase volume of thoracic cavity

Question 10

What is the diaphragm?

Answer 10

Chief muscle of respiration