Sodium, calcium, and bicarbonate are all described as plasma

A.  solvents.
B.  nutrients.
C.  electrolytes.
D.  proteins.
E.  formed elements.


C

Anatomy & Physiology

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____________________ are chemical messengers that bind to neuronal receptors at nonsynaptic sites and alter the effectiveness of ongoing synaptic activity

Fill in the blank(s) with correct word

Anatomy & Physiology

In single-unit smooth muscle, ________.

A. cells display pacemaker activity B. all cells receive direct autonomic stimulation C. cells do not respond to stretch D. norepinephrine binds to muscarinic receptors and closes K+ channels

Anatomy & Physiology

The walls of lymphatic capillaries are only one cell thick.

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

Anatomy & Physiology

T cells and B cells can be activated only by

A) pathogens. B) interleukins, interferons, and colony-stimulating factors. C) cells infected with viruses, bacteria, or cancer cells. D) exposure to a specific antigen at a specific site in a plasma membrane. E) disease-causing agents.

Anatomy & Physiology