Unit 4 B paper 2 Flashcards
1
Q
One variable that could influence the results of this study?
A
Sweat
2
Q
Deduce what events occur in muscles fibres to change them from the state shown in electron micrograph 1 to the state shown in electron micrograph 2
A
in 1 the sarcomere is relaxed meaning no contraction is happening, in state 2 sarcomere is contracting. It’s contracting bc it visibly looks shorter then 1, meaning actin has slid over myosin and both have decreased in length
3
Q
Roles of luitinizing hormone and follicle stimulating hormone
A
LH
- Stimulates ovulation
- promotes formation of corpus luteum
FSH
- Stimulates growth and maturation
- Works with LH to regulate estrogen production
4
Q
Processes that occur in ovary?
A
- Gametes develop in ovary
- Fertilization –> pollen tubes deliver sperm cells to ovary
5
Q
Benefits to the plant of secreting sugary liquid?
A
- Attracts polinators
- Seed dispersal
