Which of the following is true about veins?

A) Venous valves are formed from the tunica media.
B) Up to 35% of total body blood is in venous circulation at any given time.
C) Veins have a small lumen in relation to the thickness of the vessel wall.
D) Veins are called capacitance vessels or blood reservoirs.


D) Veins are called capacitance vessels or blood reservoirs.

Anatomy & Physiology

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Which of the following subatomic particles has a neutral charge?

a) neutron b) electron c) proton d) Both neutron and electron. e) All of these choices.

Anatomy & Physiology

Describe how lymphatic capillaries are one-way only vessels

What will be an ideal response

Anatomy & Physiology

Some species of fish are able to produce electrical discharges. These fish

A) Produce discharges continuously from their electric organ. B) Produce only weak discharges of approximately 1 volt. C) Have a specialized electric organ of highly derived nerve and muscle cells known as electrocytes. D) Are known as strongly electric fish.

Anatomy & Physiology

Rough endoplasmic reticulum (ER) is most abundant in what kind of cells?

a. cells specialized for protein secretion b. nerve cells c. cells that require minimal membrane synthesis d. cardiac muscle cells e. slowly growing cells

Anatomy & Physiology