Describe the structure of the three tunics of a blood vessel

What will be an ideal response?


The innermost tunica intima is composed of endothelium, which consists of a sheet of simple squamous tissue and its basal lamina. Deep to the endothelium is a layer of subendothelial connective tissue and a layer of elastic fibers that provide distensibility and elasticity. The middle tunica media is composed of smooth muscle cells and the external elastic lamina. The muscle cells are innervated by vasomotor nerves of the sympathetic nervous system that cause vasoconstriction and vasodilation. The outermost tunica externa is composed of supportive connective tissue.

Anatomy & Physiology

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Describe proteins

What will be an ideal response?

Anatomy & Physiology

Sensations of burning or aching pain

A) are carried by type A fibers. B) reach the CNS quickly. C) cause a generalized activation of the reticular formation and the thalamus. D) are well localized. E) are fast adapting.

Anatomy & Physiology

The figure illustrates a posterior view of the right knee joint. What does "B" represent?

A. medial (tibial) collateral ligament (MCL) B. posterior cruciate ligament (PCL) C. anterior cruciate ligament (ACL) D. lateral (fibular) collateral ligament (LCL) E. lateral meniscus

Anatomy & Physiology

Which type of inheritance is a phenomenon in which two or more genes contribute to a single phenotypic trait?

a) multiple allele b) incomplete dominant c) polygenic d) pleiotropic

Anatomy & Physiology