Overall Week 5

Question 1

Triggering of the muscle action potential occurs after:

Answer 1

Acetycholine binds to specific receptors in the skeletal muscle fibre membrane

Question 2

What are compact bones good at?

Answer 2

Resisting force applied from one direction, because the osteons run parallel to each other

Question 3

Homeostasis of glucose:

Answer 3

Increased adrenaline release would be expected to lead to increased glucose in the blood

Question 4

Do synergistic hormones enhance each other’s effects?

Answer 4

No.

Question 5

The repeating unit of a skeletal muscle fibre is the:

Answer 5

Sarcomere

Question 6

What is a function of synovial fluid?

Answer 6

• provide nutrients
• lubrication
• remove waste

Question 7

The trabeculae of spongy bone:

Answer 7

organised in a cross-cross pattern, along stress lines

Question 8

What is a characteristic of bone?

Answer 8

The bone matrix is very dense and contains deposits of calcium salts

Question 9

A new hormone (hormone X) has been discovered; the release of hormone X is seen to increase when levels of phosphorous in the blood increase above normal limits. Assuming this new hormone is involved in a typical negative feedback loop, what is most likely to occur following release of hormone X?

Answer 9

Phosphorus excretion from the body into the urine increases

Question 10

The advantage of having many nuclei in a skeletal muscle fibre is:

Answer 10

The ability to produce large amounts of the muscle proteins needed for growth and repair