(second midterm) Lecture 8 (5/2/16) PT. 1 Flashcards Preview

Bio 224 > (second midterm) Lecture 8 (5/2/16) PT. 1 > Flashcards

Flashcards in (second midterm) Lecture 8 (5/2/16) PT. 1 Deck (24):
1

The diaphragm is derived from....

hypaxial musculature of cervical segments

2

What innervates diaphragm?

right and left phrenic nerves
C3, 4, 5

3

How many arcuate ligaments are there? What do they do?

3
lateral (2), medial (2), median
they attach the diaphragm to ribs & sternum

4

How does the aorta get through the diaphragm?

via the aortic opening

5

How does the inferior vena cava get through the diaphragm from below?

via the canal opening

6

How does the esophagus get through the diaphragm?

via the esophageal opening

7

What are crura?

two muscular columns (right and left) that help attach diaphragm

8

The center of the diaphragm become less meaty and more connective tissue-like; that area is called:

the central tendon

9

Respiratory tree consists of...

Trachea > primary bronchi > secondary bronchi > tertiary bronchi > bronchioles > alveoli

10

Lung does NOT expand into ______.

cupola

11

What is "pleurisy"?

painful chaffing between visceral and parietal pleura

12

What is the partition between the right and left pleura and the enclosed lung?

the mediastinum

13

Parasympathetic nervous control of lungs is innervated by..

Vagus nerve
(constriction)

14

Opening of the respiratory tree is innervated by...

sympathetic fibers

15

Sympathetic fibers that innervate respiratory tree go up into the neck and then come back down. Why?

because they started in the neck and they moved down

16

What pulls up on 1st and 2nd ribs?

scalene muscles

17

Each successive rib pulls on the next rib via what muscles?

intercostal muscles

18

When the ribs move up and out, what happens to volume of thoracic cavity?

volume of thoracic cavity increases

19

Innervation of scalenes:

C2-7

20

What happens when the thoracic cavity volume increases?

Pressure decreases

21

What happens when pressure decreases?

air gets sucked in

22

When the diaphragm contracts, this does what to the thoracic volume?

increases it

23

Forced inhalation:

facilitated by all the muscles of the ribcage, pressurizing coelom, and contracting limb muscles around the axial body wall

24

Decreasing thoracic volume means we are...

blowing