plant and animal responses

Question 1

skeletal(voluntary muscle)

Answer 1

made of,many muscle fibres which contain myofibrils. Myofirbils specialised for contraction as they contain actin and myosin which allow contraction. Contain lots of mitochondria to provide ATP for contraction.likely to fatigue

Question 2

calcium ions

Answer 2

activate enzyme atpase which breaks down atp for muscle contraion.

Question 3

giberelin

Answer 3

stimulates seed germination by triggering the break down of food stores into glucose which plant embryo can use to repsire and release energy needed to grow.

Question 4

high blood pressure

Answer 4

detected by baroreceptors impulse sent along vagus nerve causing acetylcholine to be released slowing heart rate

Question 5

high blood o2 low co2 high ph

Answer 5

chemoreceptors detect and impulses sent along vague merve release acetylcholine which binds to san decreasing heart rate