bio review video 2 transcript

Question 1

What does negative feedback do?

Answer 1

Reverses a change.

Question 1

What does positive feedback do?

Answer 1

amplifies a change.

Question 2

How do endotherms stay warm?

Answer 2

Use metabolic heat.

Question 3

How do ectotherms warm up?

Answer 3

Use external heat.

Question 4

What helps animals cool down?

Answer 4

Sweating or panting.

Question 5

What helps bats survive cold?

Answer 5

Hibernation.

Question 6

Which animals lose heat faster?

Answer 6

Smaller animals.

Question 7

Do larger animals have higher or lower metabolism?

Answer 7

Lower.

Question 8

What marks start of diploid stage?

Answer 8

Embryo formation

Question 9

What stage forms three germ layers?

Answer 9

Gastrula.

Question 10

What are cells in the gastrula?

Answer 10

Multipotent cells.

Question 11

What does totipotent mean?

Answer 11

Can become any cell type.

Question 12

What tissue makes matrix like bone?

Answer 12

Connective tissue.

Question 13

What tissue lines organs?

Answer 13

Epithelial tissue.

Question 14

What tissue contracts?

Answer 14

Muscle tissue.

Question 15

What carries electrical signals?

Answer 15

Action potentials.

Question 16

What enters axon during depolarization?

Answer 16

Sodium (Na⁺).

Question 17

What system controls rest functions?

Answer 17

parasympathetic.

Question 18

What system handles stress?

Answer 18

Sympathetic.

Question 19

What lowers blood sugar?

Answer 19

Insulin.

Question 20

What raises blood sugar?

Answer 20

Glucagon.

Question 21

Where are nutrients absorbed?

Answer 21

Small intestine.

Question 22

What organ stores glycogen?

Answer 22

Liver.

Question 23

What do ruminants use to digest plants?

Answer 23

Multi-chambered stomach.

Question 24

What chamber has enzymes in ruminants?

Answer 24

Abomasum

Question 25

What do omnivores eat?

Answer 25

Plants and meat.

Question 26

What vitamin is fat-soluble?

Answer 26

Vitamin D.

Question 27

What mineral decreases during fever?

Answer 27

Iron.

Question 28

What hormone conserves water?

Answer 28

ADH.

Question 29

Where does filtration happen?

Answer 29

Bowman's capsule.

Question 30

What part creates osmotic gradient?

Answer 30

Loop of Henle.

Question 31

Where is urine collected?

Answer 31

Collecting duct → renal pelvis→ureter→urinary bladder→urethra

Question 32

What blocks ADH release?

Answer 32

Alcohol.

Question 33

What hormone regulates sleep?

Answer 33

Melatonin.

Question 34

What gland makes LH and FSH?

Answer 34

Anterior pituitary.

Question 35

What hormones support reproduction?

Answer 35

LH, FSH, progesterone.

Question 36

What cell starts immune response?

Answer 36

Helper T cell.

Question 37

What makes antibodies?

Answer 37

Plasma B cells.

Question 38

What keeps memory of pathogens?

Answer 38

Memory B cells.

Question 39

What causes allergic reaction?

Answer 39

igE antibodies and histamine.

Question 40

What carries blood to heart?

Answer 40

Veins.

Question 41

What artery carries low oxygen blood?

Answer 41

Pulmonary artery.

Question 42

What triggers breathing?

Answer 42

Low pH from CO₂.

Question 43

What does CO₂ form in blood?

Answer 43

Carbonic acid.

Question 44

What shifts oxygen curve right?

Answer 44

Low pH, high temp.

Question 45

What is oxygen used for?

Answer 45

Making ATP.

Question 46

What forms after ovulation?

Answer 46

Corpus luteum.

Question 47

What hormone shows pregnancy?

Answer 47

hCG.

Question 48

What forms between mother and fetus?

Answer 48

Placenta.

Question 49

What is parthenogenesis?

Answer 49

Asexual egg development.

Question 50

What is polygyny?

Answer 50

One male, many females.

Question 51

What is kin selection?

Answer 51

Helping relatives.

Question 52

What is cognitive learning?

Answer 52

Solving new problems.

Question 53

What is manipulated maternal care?

Answer 53

Brood parasitism.

Question 54

What is plant's first defense?

Answer 54

Waxy cuticle.

Question 55

What are plant stem cells called?

Answer 55

Meristems.

Question 56

What do inducible defenses do?

Answer 56

Activate only when needed.

Question 57

What are secondary metabolites?

Answer 57

Plant defense chemicals.

Question 58

Where do plants absorb nutrients?

Answer 58

Root hairs.

Question 59

Who fixes nitrogen?

Answer 59

Bacteria.

Question 60

What is usable nitrogen for plants?

Answer 60

Nitrate.

Question 61

Where is phosphorus mostly found?Rocks and soil.

Answer 61

Rocks and soil.

Question 62

What helps plants absorb nutrients?

Answer 62

Mycorrhizal fungi.

Question 63

Where does most transpiration occur?

Answer 63

Leaf stomata.

Question 64

What increases algal blooms?

Answer 64

Excess nutrients.

Question 65

What defines a keystone species?

Answer 65

Big impact on habitat.

Question 66

What defines invasive species?

Answer 66

Outcompetes natives.

Question 67

What biome is most productive?

Answer 67

Tropical rainforest and oceanic

Question 68

What are limiting biome factors?

Answer 68

Temp and precipitation.

Question 69

What is a positive climate feedback?

Answer 69

CO₂ traps more heat.

Question 70

Why is intact habitat valuable?

Answer 70

Provides ecosystem services.