The philtrum is a shallow groove in the skin between your nose and upper lip. Which terms best describes the position of the philtrum?
a. lateral and plantar
b. medial and proximal
c. dorsal and distal
d. superficial and anterior
Answer: d. superficial and anterior
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When the ions move across the cell membrane, an electrical potential change results. As you are probably aware, nerves trigger muscle movement. When you place your finger on a sharp object (such as a tack), you quickly draw your hand away and develop a sensation of pain. Which types of channels are operating under these conditions to allow nerve conduction and subsequent muscle movement?
What will be an ideal response?
Endocrine responses occur more slowly and last longer than neural responses
Indicate whether the statement is true or false
The basic structural component of the plasma (cell) membrane is ________
A) chromatin B) phospholipid bilayer composed of two layers of phospholipid molecules C) telophase D) nuclear membrane
Which portion of the brain contains the posterior part of the fourth ventricle?
A. Pons B. Thalamus C. Medulla oblongata D. Hypothalamus E. Cerebellum