By the time the filtrate reaches the loop of Henle, the reabsorption of water and ions has
A) removed all of the sodium from the filtrate.
B) left the filtrate hyperosmotic.
C) left the filtrate iso-osmotic.
D) left the filtrate hypoosmotic.
E) removed all of the potassium from the filtrate.
Ans: C) left the filtrate iso-osmotic.
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The integumentary system is protected by the action of cells that arise from bone marrow and migrate to the epidermis. Which of the following cells serve this function?
A) cells found in the stratum spinosum B) macrophages called epidermal dendritic cells C) keratinocytes, because they are so versatile D) tactile cells
The contractile units of skeletal muscles are ________
A) microtubules B) myofibrils C) mitochondria D) T tubules
The knee is ____________________ to the ankle
Fill in the blank(s) with correct word
Autonomic motor nerves do NOT innervate ________.
A. cardiac muscle B. skeletal muscle C. glands D. smooth muscle