The majority (80%) of ventricular filling occurs ___________.
A. during late ventricular systole
B. passively through blood flow alone
C. with atrial systole
D. both a and b
Answer: D. both a and b
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Which of the following is (are) true of the spleen?
A) It contains trabecular arteries. B) It contains areas of red and white pulp. C) It is the largest lymphoid organ in the body. D) It performs the same functions for the blood as the lymph nodes do for the lymph. E) All of the answers are correct.
Which of the following statements is FALSE? a. Hormones are long distance signaling molecules. b. Nanotubes allow the movement of organelles between adjacent cells. c. Cytokines may act as small, long distance signaling molecules. d. Paracrine signaling molecules are one type of chemical communication betweenorganisms
e. Steroids are hydrophobic molecules derived from cholesterol.
If the thyroid gland is unable to produce iodinated thyroglobulin, what is the effect on hormone production?
A) Triiodothyronine (T3 ) and thyroxine (T4 ) production continues uninterrupted. B) Excess triiodothyronine (T3 ) and thyroxine (T4 ) hormones are made. C) Less thyroid-stimulating hormone (TSH) is made. D) Less triiodothyronine (T3 ) and thyroxine (T4 ) hormones are made.
Myasthenia gravis is an autoimmune disorder in which the immune system attacks and destroys acetylcholine receptors.
Answer the following statement true (T) or false (F)