Circulatory System

Question 1

Simple unicellular organisms depends on what process?

Answer 1

diffusion process

Question 2

complex and larger animals needs..?

Answer 2

transport system

Question 3

circulatory system consists of?

Answer 3

heart, arteries, veins, capillaries

Question 4

what’s the size of a heart

Answer 4

clenched fist

Question 5

heart wall consists of?

Answer 5

cardiac muscle

Question 6

supplies oxygenated blood

Answer 6

coronary arteries

Question 7

collect deoxygenated blood

Answer 7

coronary veins

Question 8

heart is surrounded by a sac called?

Answer 8

pericardium

Question 9

four chambers of the heart

Answer 9

• right and left atria
• right and left ventricle

Question 10

four valves of the heart

Answer 10

tricuspid, pulmonic, mitral, aortic valve

Question 11

contraction of the heart is controlled by what tissue?

Answer 11

nodal tissue

Question 12

first nodal tissue in humans

Answer 12

sinoatrial node (san)

Question 13

second nodal tissue

Answer 13

atrioventicular node (avn)

Question 14

heart rate is controlled by two factors which are?

Answer 14

nervous and hormonal control

Question 15

two sets of nerve of SAN

Answer 15

parasympathetic - decrease
sympathetic - increase

Question 16

two hormonal control actions

Answer 16

adrenaline and thyroxine

Question 17

factors affecting heart rate (give at least 5)

Answer 17

• change in ph
• temp
• body size
• gender
• age
• physical activity
• stress
• state of health
• meds
• environ. factors
• smoking, alcohol

Question 18

disease caused by deposition of fats on the walls of arteries

Answer 18

arteriosclerosis

Question 19

disease where pressure is exerted on the walls of blood vessels

Answer 19

hypertension

Question 20

result of blood clot

Answer 20

heart attack

Question 21

moves water and solutes from roots to leaves

Answer 21

xylem

Question 22

moves glucose and amino acid around the plant

Answer 22

phloem

Question 23

where is xylem and phloem found

Answer 23

vascular bundles

Question 24

cells in xylem and phloem

Answer 24

xylem - elongated dead cells
phloem - living cells

Question 25

evaporation of water from leaves and stem

Answer 25

transpiration

Question 26

transport of glucose and amino acids

Answer 26

translocation

Question 27

process of transpiration

Answer 27

- water goes in the soil - passes through concentration gradient - root hairs - xylem - transports water from root, stem, then leaves

Question 28

process of translocation

Answer 28

- glucose - converted to fructose - enters phloem as amino acids - transport around plant

Question 29

water is absorbed by root hairs by?

Answer 29

osmosis

Question 30

route where water moves without air resistance

Answer 30

apoplast route

Question 31

route where water is hindered by resistance

Answer 31

symplast route

Question 32

route where water moves in and out of cell vacuoles by osmosis

Answer 32

vacuolar route

Question 33

water movement in cortex (3 routes)

Answer 33

- absorbed into the cell sap - absorbed into the cytoplasm - diffuses along cell wall

Question 34

a suction power

Answer 34

transpiration pull

Question 35

phloem tissues consists of two main types

Answer 35

sieve tubes and companion cells