Which of the following best describes the term titin?
A) substance that accounts for elasticity of resting muscle
B) repeating unit of striated myofibrils
C) storage site for calcium ions
D) where thin filaments are anchored
E) largely made of myosin molecules
Answer: A
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The pulmonary circuit is composed of arteries and veins that transport blood between
A) the portal system and the liver. B) the digestive system and the liver. C) the heart and the rest of the body. D) the heart and the lungs. E) None of the answers are correct.
Second messengers are triggered as a response to:
A) steroid hormones B) anabolic steroids C) peptide hormones D) all of the above E) none of the above
Which of these structures is a part of the upper respiratory tract?
A) bronchi B) larynx C) lungs D) pharynx E) trachea
Under what conditions would the skin produce sweat and experience cutaneous vasodilation?
A) upon decrease in body temperature B) upon increase in body temperature C) upon exposure to UV radiation D) due to lack of oxygen