All cardiac veins empty into the ________, which then empties into the ________.
A. great cardiac vein; superior vena cava
B. coronary sinus; right atrium
C. coronary sinus; left atrium
D. great cardiac vein; right atrium
E. inferior vena cava; left atrium
Answer: B
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A) P wave B) T wave C) QRS complex D) P-R interval E) R-T interval
An erection of the penis is caused by
A. increased secretions of lymph into the spongy tissue. B. muscle flexion of the penile muscles. C. blood filling the erectile bodies and compressing the veins. D. semen pressure from the testes and ductus deferens. E. ejaculatory muscles.
Which of the following is not a neurotransmitter?
A. Acetylcholine B. Lipofuscin C. Glutamate D. Serotonin E. Gamma-aminobutyric acid (GABA)
The primary function of the large intestine is to store and dilute unabsorbed fecal material
Indicate whether the statement is true or false.