Review CHAP 20

Question 1

How do the 2 divisions of the autonomic nervous system modify heart rate?

Answer 1

SYMPATHETIC: INCREASING ACTIVITY; INCREASE HEART RATE. PARASYMPATHETIC: MODIFYING & DECREASING HEART RATE

Question 2

Function of angiotensin 2 in terms of blood pressure (increase/decrease? How?).

Answer 2

VASOCONSTRICTOR; INCREASE BLOOD PRESSURE BECAUSE IT DRAWS IN MORE WATER; DECREASES URINE FORMATION

Question 3

Know the 3 arteries branching off the ascending aorta.

Answer 3

BRACHIOCEPHALIC TRUNK: RIGHT SIDE; SUPPLIES BLOOD TO UPPER LIMBS, THORACIC, NECK, & HEAD.
LEFT COMMON CAROTID ARTERY: SUPPLIES BLOOD TO LEFT SIDE OF NECK & HEAD.
LEFT SUBCLAVIAN ARTERY: SUPPLIES BLOOD TO LEFT UPPER LIMB & THORACIC.

Question 4

Know the arteries associated with the descending aorta.

Answer 4

RIGHT COMMON ILIAC ARTERY & LEFT COMMON ILIAC ARTERY

Question 5

P-WAVE:

Answer 5

ATRIAL DEPOLARIZATION

Question 6

QRS COMPLEX:

Answer 6

VENTRICULAR DEPOLARIZATION

Question 7

T-WAVE:

Answer 7

VENTRICULAR REPOLARIZATION

Question 8

What function do capillaries provide?

Answer 8

SITE OF GAS EXCHANGE

Question 9

Vessel wall layers in relation to arteries, veins, & capillaries:

Answer 9

CAPILLARY & VEIN WALLS ARE VERY THIN; ARTERIES HAVE THICK WALLS

Question 10

Define lumen. Relation to veins & arteries?

Answer 10

INSIDE OF VESSEL WHERE BLOOD IS TRANSPORTED. VEINS HAVE LARGE LUMEN; ARTERIES HAVE SMALL LUMEN

Question 11

Valves:

Answer 11

ONLY VEINS HAVE VALVES; MADE OF FIBROUS CT FLAPS

Question 12

Direction of blood flow relative to the heart:

Answer 12

ARTERIES: AWAY FROM HEART. VEINS: TOWARD THE HEART

Question 13

Order of tunic layers?

Answer 13

TUNICA INTIMA (DEEPEST), TUNICA MEDIA (MIDDLE), & TUNICA EXTERNA (SUPERFICIAL)

Question 14

What is each tunic layer comprised of?

Answer 14

INTIMA: ENDOTHELIUM
MEDIA: THICKER IN ARTERIES BECAUSE MORE ELASTIC
EXTERNA: VASA VASORUM WHICH SUPPLIES NUTRIENTS TO A LARGE VESSEL; THICK IN VEINS