Plants & animal responses

Question 1

How do plants respond to abiotic stress & herbivory?

Question 2

What neurotransmitter is involved in sympathetic nervous system?

Answer 2

Noradrenaline

Question 3

What neurotransmitter is involved in parasympathetic nervous system?

Answer 3

Acetylcholine

Question 4

What do baroreceptors detect?

Answer 4

Change in blood pressure

Question 5

What’s the effector in the eye for blinking reflex?

Answer 5

Orbicularis oculi

Question 6

What’s abiotic stress?

Answer 6

Anything potentially harmful to a plant that’s natural but non-living e.g., drought

Question 7

Where are growth hormones produced?

Answer 7

Growing regions of plants e.g., shoot & root tips

Question 8

What type of hormone is indoleacetic acid (IAA)?

Answer 8

Auxin

Question 9

What’s inhibited by high IAA concentration?

Answer 9

Root growth

Question 10

What’s the shoot tip of a flowering plant called?

Answer 10

Apical bud

Question 11

What happens in apical dominance?

Answer 11

Auxins stimulate growth of apical bud and inhibit growth of side shoots

Question 12

What hormone are gibberellins inhibited by?

Answer 12

Abscisic acid

Question 13

What are auxins and giberellins?

Answer 13

Synergistic (work together to have a big effect)

OR

Antagonistic (oppose each others actions)

Question 14

What plants lose leaves in winter?

Answer 14

Deciduous plants

Question 15

Why do plants lose their leaves?

Answer 15

Help conserve water

Question 16

What is leaf loss triggered by?

Answer 16

Shortened day length

Question 17

How do auxin cause leaf loss?

Answer 17

As plant gets older, less auxin produced so leaves drop

(if high auxin concentration, then this inhibits leaf loss)

Question 18

How does ethene cause leaf loss?

Answer 18

As plants get older, more ethene produced

Question 19

What’s the relationship between auxins and ethene in leaf drop?

Answer 19

Antagonistic

Question 20

What plant hormone triggers stomatal closure?

Answer 20

Abscisic acid

Question 21

What are the similarities of plant and animal responses?

Answer 21

• May involve the interaction of more than one hormone
• May have an effect on more than one target tissue
• Hormone has to bind to receptor

Question 22

What’s the process of plants growing taller?

Answer 22

Etiolation

Question 23

How many binding sites does myosin have? And what are they for?

Answer 23

2 - ATP and actin

Question 24

What two molecules are found between actin filaments?

Answer 24

Troponin and tropomyosin (attached to each other)