Pupil diameter would be increased by contraction of the ________.

A. radial muscles
B. superior rectus muscle
C. circular muscles
D. ciliary body


Answer: A

Anatomy & Physiology

You might also like to view...

The resistance to fatigue of fast fibers is ________ when compared to that of slow or intermediate fibers.

A. identical B. high C. low

Anatomy & Physiology

Before beginning orthodontic treatment, a patient may have her wrist and hand x-rayed to determine her stage of growth. What feature of the long bones will the orthodontist use to assess this?

A.  Osteon B.  Periosteum C.  Spongy bone D.  Epiphyseal plate E.  Compact bone

Anatomy & Physiology

All cells (not just animal cells) have

a. mitochondria. b. a cell membrane. c. a cell wall. d. a nucleus. e. microtubules.

Anatomy & Physiology

Which structure is a bundle of smooth muscle fibers that are attached to the hair follicle?

a. cuticle b. root c. medulla d. arrector pili

Anatomy & Physiology