Spatial summation refers to
A) repeated graded potentials reaching the trigger zone one after the other.
B) multiple graded potentials arriving at one location simultaneously.
C) electrical signals reaching neurons from outer space.
D) suprathreshold potentials triggering action potentials that are extra large.
E) All of the answers are correct.
B) multiple graded potentials arriving at one location simultaneously.
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The TMR:
a. is usually less than the BMR b. is usually greater than the BMR c. increases as activity increases d. both B and C above
The central nervous system contains a dense network of lymphatic capillaries.
Answer the following statement true (T) or false (F)
Which skull canal contains blood vessels that drain blood from the skull?
A. External auditory meatus B. Nasolacrimal canal C. Foramen ovale D. Jugular foramen E. Carotid canal
Old or defective erythrocytes and platelets are engulfed within the lymph organ known as the ________.
Fill in the blank(s) with the appropriate word(s).