Which is not correct about the vascular tunic of the eye?
A. The choroid is the most extensive and posterior region of the vascular tunic.
B. Melanin pigment granules in the choroid absorb extraneous light.
C. The iris is composed of two groups of skeletal muscle fibers.
D. The ciliary body epithelium secretes aqueous humor.
E. Relaxation and contraction of ciliary muscles alter the shape of the lens.
Answer: C
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The thoracic nerves are also called the
a) brachial nerves. b) lumbar nerves. c) sacral nerves. d) cervical nerves. e) intercostals nerves.
Which cranial nerve in the diagram has an autonomic motor function primarily involved in stimulating secretion of saliva?
a) F b) I c) J d) K e) L
The lymph nodes of the axillary region receive lymph mainly from the
A) abdominal viscera. B) thoracic viscera. C) scalp and face. D) upper limb and mammary gland.
Blood travelling to the liver can be said to be ________ in nutrients and ________ in oxygen, compared to blood elsewhere.
A. lower; lower B. lower; higher C. higher; lower D. higher; higher