exam 3 / quiz 7

Question 1

circulatory system system

Answer 1

open- one fluid type that fluid bathes organs directly = hemolymph
- ex. arthropods –> insects, crustations, and mollusks

closed - multiple fluids ex. blood, lymph, intestines
- interstitial fluid - bathes the cells
- cerebral spinal fluid ex. cephalopods, annelids, vertebrates

Question 2

3 parts of a closed circulatory system

Answer 2

1. blood
2. blood vessels
3. heart

Question 3

blood

Answer 3

cells that travel in blood vessels to every cell of the body.
- fluid -> plasma - h20, salts, proteins, nutrients, wastes, and gases.
- cells –> white, leukocytes (nucleonic), immune system and red, erythrocytes (no nucleus)
- platelets –> aid in clotting

Question 4

blood vessels

Answer 4

pathway for blood travel in body.
heart -> arteries, away –> capillary = co2 exchange —> veins, toward –> heart

Question 5

heart

Answer 5

pumping blood through blood vessels
atria - enters heart
ventricles - leaves heart

Question 6

single circuit

Answer 6

if blood goes to heart 1x ex fish

Question 7

double circuit

Answer 7

is blood goes to heart 2x ex amphibians - mixing og o2 rich to o2 poor blood

Question 8

normal blood pressure

Answer 8

120/80

Question 9

atria

Answer 9

fills w blood

Question 10

ventricles

Answer 10

pump out of heart

Question 11

sino atrial node

Answer 11

controls heart + hylform , impacted by temp hormones

Question 12

regulation of breathing

Answer 12

stimuli: low blood ph
signal cell: sensors in by blood cells
target cell: brain (medulla ) via ph changes in csf
response: increase in breathikng by contractions of diaphragm