Chapter 6 Homework

What role does acetylcholine play in muscle contraction?

Stimulate muscle contraction

Which structure connects muscles to bone?

Tendons

Which muscle tissue is responsible for involuntary movements and is found in the walls of hollow internal organs?

Smooth muscle

Which condition is caused by overuse or injury to the tendons surrounding a joint, leading to inflammation?

Tendinitis

1

K.

latissimus dorsi

2

I.

trapezius

3

E.

deltoid

4

C.

biceps brachii

5

H.

triceps

7

D.

pectoralis major

10

A.

obliques

9

J.

abdominals

11

L.

gluteus maximus

12

B.

quadriceps

16

F.

hamstring

18

G.

calf muscle

What is the role of the antagonist muscle during movement?

Relaxes to allow the agonist to contract

Which of the following is a common symptom of myasthenia gravis?

Muscle weakness that worsens with activity

What kind of muscle is responsible for heart contractions, pumping blood throughout the circulatory system.

Cardiac muscle

Which neurotransmitter is affected in myasthenia gravis?

Acetylcholine

What is the term for the contractile unit of a muscle fiber?

Sarcomere

What is the primary function of skeletal muscle?

Produce movement of bones through voluntary control

Which ion is essential for muscle contraction?

Calcium

Extension

Extending the knee so the leg is straight

Flexion

Bending an elbow

Abduction

Raising your hand straight up in the air

Adduction

Moving your arm down by your side

Rotation

Turning your neck

Circumduction

Spinning your arm in a circular motion

Pronation

Turning your hand so the palm is facing down

Supination

turning your hand so the palm is facing up

Opposition

Moving your thumb across your hand (towards the pinky finger)

Inversion

Turning your foot so the sole is pointing inward

Eversion

Turning your foot so the sole is facing outward