Which of the following muscles is not externally visible on the trunk of the body?
A. Latissimus dorsi
B. External oblique
C. Pectoralis major
D. Transverse abdominal
E. Trapezius
Answer: D
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The arteries and veins that leave and enter the heart are called the great vessels because
A. they are longer than any other blood vessels in the body. B. they carry the most highly oxygenated blood. C. Both types have the highest blood pressure in the body. D. they have relatively large diameters. E. they are associated with the heart directly.
Large doses of certain stimulants can lead to dangerous increases in heart rates. Such a stimulant is a
A. positive chronotropic agent. B. negative chronotropic agent. C. positive inotropic agent. D. negative inotropic agent.
Which of the following cartilaginous joints is found only in young, growing people?
A) pubic symphysis B) intervertebral disc C) epiphyseal plate D) costochondral joint
Competition for receptors is strictly a pharmacological phenomenon, since naturally occurring chemical messengers do not compete with each other for the same receptor site
Indicate whether the statement is true or false.