Skin wrinkles with age because
A) collagen degrades in the subcutaneous layer as the epidermis shrinks.
B) the number of sweat glands diminishes.
C) fat is lost from the subcutaneous layer and the dermis shrinks.
D) epidermal cells undergo a burst of cell division.
C
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The ________ muscle partitions the neck into the anterior and posterior triangles.
Fill in the blank(s) with the appropriate word(s).
Which of the following statements about voltage-gated sodium channels is true?
a. All cells contain voltage-gated sodium channels. b. Voltage-gated sodium channels are integral membrane proteins. c. Voltage-gated sodium channels have roughly equal permeability to Na+ and K+. d. Voltage-gated sodium channels open in response to any change in membrane potential. e. Voltage-gated sodium channels open in response to binding of acetylcholine.
The mucous membrane that lines the interior cavities of the body is called the visceral membrane.?
Indicate whether the statement is true or false
A poison having destructive effects on the kidneys is a/an __________
Fill in the blank(s) with correct word