What differentiates a closed circulatory system from an open circulatory system?
A) The presence of a heart
B) The presence of a circulating fluid
C) The presence of vessels
D) Direct contact of circulating fluid with tissues
Answer: D
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Forward failure is when the heart fails to pump an adequate amount of blood forward to the tissues because the stroke volume becomes progressively smaller
Indicate whether the statement is true or false
The thick, flat sheet of tendon deep to the scalp is called the
A) retinaculum. B) calcaneal tendon. C) linea alba. D) plantar aponeurosis. E) epicranial aponeurosis.
If acetylcholine binds to muscarinic receptors,
A. Na+ channels open. B. Ca2+ channels open. C. adrenaline is released. D. G proteins mediate the cell's response. E. the response is neither excitatory nor inhibitory.
The ___________ secretes insulin and glucagon
a. posterior pituitary b. liver c. pancreas d. stomach e. adrenal medulla