Answer the following statements true (T) or false (F)

1. Bursae are small fluid-filled sacs that lie between some tendons and bones.
2. The thin myofilament in a muscle fiber is made of actin.
3. The thick myofilament in a muscle fiber is made of actin.
4. The basic contractile unit of a muscle is called a sarcomere.
5. Z-lines mark the ends of individual sarcomeres.


1. TRUE
2. TRUE
3. FALSE
4. TRUE
5. TRUE

Anatomy & Physiology

You might also like to view...

The ________ are the four masses on the posterior of the midbrain

A) cerebral peduncles B) reticular formation C) substantia nigra D) choroid plexuses E) corpora quadrigemina

Anatomy & Physiology

Endorphins and enkephalins

a. are endogenous morphine-like substances. b. are important in the body's natural analgesic system. c. block the actions of substance P by binding with opiate receptors. d. both (a) and (b) above. e. all of these answers.

Anatomy & Physiology

What are the sensory neurons in the PNS?

A. Somatic Sensory B. Visceral Sensory C. A and B D. none of the above

Anatomy & Physiology

Regurgitation of blood flow through the aortic semilunar valve would give rise to

A. the first heart sound. B. the second heart sound. C. a heart murmur. D. an extra heart beat. E. end-systolic volume.

Anatomy & Physiology