Why do some normal cells fail to respond to a chemical signal?

A) Some cells are completely without ligands.
B) Signal chemicals often break down before reaching a distant target.
C) Chemical signals are only delivered to specific cells.
D) Some cells are completely without receptors.
E) Some cells lack the necessary receptors.


E) Some cells lack the necessary receptors.

Anatomy & Physiology

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All organic compounds contain carbon

Indicate whether the statement is true or false

Anatomy & Physiology

A deficiency in channels that allow ____________________ ions to pass through cell membranes is responsible for cystic fibrosis

Fill in the blank(s) with correct word

Anatomy & Physiology

The inability to produce a gag reflex could indicate a problem with the:

A) abducens nerve (VI) or trochlear nerve (IV). B) glossopharyngeal nerve (IX) or vagus nerve (X). C) facial nerve (VII) or trigeminal nerve (V). D) hypoglossal nerve (XII) or vestibulocochlear nerve (VIII).

Anatomy & Physiology

All ribs articulate with the sternum.

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

Anatomy & Physiology