Circulatory and Endocrine systems

Question 1

definition of circulatory system

Answer 1

blood, pumping organ, system of blood vessels

Question 2

what is a circulatory system used for

Answer 2

delivers oxygen and takes away waste products

Question 3

transport substances

Answer 3

oxygen and carbon dioxide

Question 4

Blood helps maintain what

Answer 4

Homeostasis and acts as buffer

Question 5

Open circulatory systems

Answer 5

blood isn’t confined to closed vessels, may be organise channels through certain organs, blood tissue exchange in tissue spaces (Molluscs and arthropods)

Question 6

OCS molluscs

Answer 6

One ventricle, haemocoel to gills

Question 7

OCS arthropods

Answer 7

bloods collects in pericard and enters the heart through dorsal ostia

Question 8

OCS characteristics

Answer 8

More difficult to regulate, sluggish, hydrostatic functions, helps with shape change, assists moulting in arthropods

Question 9

Closed circulatory system

Answer 9

Blood circulates in blood vessels, blood tissue exchange occurs in capillaries

Question 10

CCS are in what

Answer 10

invertebrates, annelids, cephalopods

Question 11

CCS characteristics

Answer 11

Active organisms, higher metabolic rate, contractile vessels and accessory hearts

Question 12

CCS - vertebrates - Fish

Answer 12

heart - gills, becomes oxygenated - body

pros - blood is fully oxygenated when leaving gills

cons - low blood pressure, limits rate blood can be delivered

Question 13

CCS - vertebrates - Amphibians and most reptiles (three cambered heart)

Answer 13

Pros - higher blood pressure

cons - no complete separation

Question 14

CCS

Question 15

Hormones are what

Answer 15

chemical signals responsilbe for growth development, sexual maturation and immune function

Question 16

Classes of hormones

Answer 16

steroids, Amine derivatives, Peptides and proteins

Question 17

Ecdysis or moulting hormonal control

Answer 17

temp, day length trigger CNS to begin ecdysis, CNS decreases production of molt-inhibiting hormone. promotes release of moulting hormone

Question 18

Endocrine disruptor (EDC)

Answer 18

a chemical thar interferes with the synthesis secretion transport or binding or any hormone in the body

Question 19

Known sources of EDCs

Answer 19

Pesticides, leaching from plastics, birth control pills, commercial cleaners, industrial chemicals - PCB dioxins and PAH

Question 20

EDCs are linked to

Answer 20

immune system dysfunction, cancers, birth defects, neurological effects

Question 21

EDCs bioaccumulative

Answer 21

instead of breaking down when eaten it builds

Question 22

Nonylphenol

Answer 22

makes chemicals work better in water, suspected of feminizing male fish around the world