Chapter 18 Quiz 2

The diagram below shows muscles and bones of a human arm.

What is structure X?

• ligament

• connective tissue

• tendon

• muscle fibre

The diagram below shows muscles and bones of a human arm.

What is the function of structure X?

• To hold the bones in position and prevent dislocation

• To transmit the pulling force from muscles to bones

• To reduce friction between the bones during movement

The diagram below shows muscles and bones of a human arm.

Y relaxes when Z contracts.

• True

• False

The diagram below shows muscles and bones of a human arm.

The arm straightens when Z contracts.

• True

• False

The diagram below shows muscles and bones of a human arm.

The tension in X increases when Z contracts.

• True

• False

Complete the flowchart below to show how muscle contraction is triggered by nerve impulses.

What are (a) and (b)?

• (a) nerve impulse；(b) neurotransmitters

• (a) neurotransmitter；(b) nerve impulses

Complete the flowchart below to show how muscle contraction is triggered by nerve impulses.

What are (c) and (d)?

• (c) motor end plate；(d) diffusion

• (c) motor end plate；(d) active transport

• (c) neuromuscular junction；(d) diffusion

• (c) neuromuscular junction；(d) active transport