biology gas exchange and circulation Flashcards

1
Q

raspitory surfaces

A

must be thin and moist for quicker diffusion of O2 and CO2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

gills

A

žiaunos
gill filaments bearing many platelike lamellae
gills absorb O2 dissolved in water

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

countercurrent exchange

A

the transfer of a substance such as oxygen between two fluids flowing in opposite directions

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

operculum

A

gill cover

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

advantages of breathing air

A

air contains a much higher concentration of O2
air is much lighter and easier to move our body within (less energy is used)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

diaphragm

A

separates the abdominal cavity from the thoracic cavity
helps ventilate the lungs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

mucus and cilia

A

in the raspitory passeges protect the lungs from contaminants and dust

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

inhalation

A

the contraction of rib muscles and the diaphragm expands the thoracic cavity, reducing air pressure in the alveoli and drawing air into the lungs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

exhalation

A

the relaxation of rib muscle and the diaphragm contract the thoracic cavity, increasing air pressure in alveoli, leading to exhalation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

vital capacity

A

the maximum volume of air that can be inhaled and exhaled with each breath

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

normal blood pH

A

about 7.4
CO2 + H2O <–> H2CO3 <–> H+ + HCO3-

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

how our brain indicates the amount of CO2 in our blood?

A

MEDULLA by sensing the pH of our cerebrospinal fluid
Medulla oblongata - the bottom-most part of your brain

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

why molluscs blood is blue?

A

oxygen is bound to copper-containing pigment, which is blue

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

fish heart

A

two-chambered
heart pumps blood in a single circulation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

land vertebrates

A

double circulation
pulmonary (heart and lungs) and systematic circuit (heart and the rest of the body)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

blood flow through the double circulatory system in humans

A
  • drains from the superior vena cava (from the head and arms) or inferior vena cava (from the lower trunk and legs) into the right atrium
  • moves out to the lungs via the pulmonary artery
  • returns from the lungs to the left atrium through the pulmonary vein
  • leaves the heart through the aorta
17
Q

diastole

A

blood flows from the veins into the heart chambers

18
Q

systole

A

contractions of the atria push blood into the ventricles, and then stronger contractions of the ventricles propel blood into the large arteries

19
Q

valves

A

vožtuvai
semilunar valve
AV valve

20
Q

cardiac output

A

the volume of blood that each ventricle pumps per minute

21
Q

heart rate

A

number of heartbeats per minute

22
Q

AV valve

A

between atrium and ventricle

23
Q

semilunar valve

A

between ventricle and pulmonary artery / aorta

24
Q

SA node

A

sinoatrial node
generates electrical impulses in atria
set the rate of heart contractions

25
Q

AV node

A

atrioventricular node
relays signals from AV node to the ventricles
trigger ventricular contractions

26
Q

ECG

A

electrocardiogram

27
Q

stroke

A

death of the brain tissue due to lack of O2

28
Q

atherosclerosis

A

During the course of this disease, fatty deposits called plaques develop in the inner walls of arteries, narrowing the blood vessel through which blood can flow

29
Q

blood consists of

A

plasma
red blood cells
white blood celss
platelets

30
Q

amenia

A

low number of red blood cells

31
Q

hormone erytropoietin (EPO)

A

stimulates the bone marrow to produce
more red blood cells

32
Q

fibrin inactive form

A

fibrinogen

33
Q

leukemia

A

cancer of white blood cells