What occurs immediately before an electrical signal travels along the sarcolemma?
A. Calcium binds to troponin.
B. Calcium is released from the sarcoplasmic reticulum.
C. Acetylcholine diffuses across the synaptic cleft.
D. Acetylcholine binds to its receptors.
Answer: D
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A) hormonally controlled in distal tubule segments B) not limited by a transport maximum C) in the distal convoluted tubule D) accomplished after the nephron loop is reached
The portion of the female reproductive tract in birds that directs the egg to the cloaca is the:
A) uterus B) urodeum C) vagina D) isthmus
The sympathetic nervous system is always excitatory to the organs it innervates
Indicate whether the statement is true or false
Extensions of the renal cortex that project into the medulla (and subdivide it) are known as the renal ________.
Fill in the blank(s) with the appropriate word(s).