Which of the following is true regarding the levator scapulae?
A. It is innervated by the phrenic nerve.
B. It elevates the scapula if the scapula is fixed.
C. It rotates the scapula and depresses the apex of the shoulder.
D. It flexes the neck if the scapula is fixed.
E. It protracts the scapula if the humerus is fixed.
D. It flexes the neck if the scapula is fixed.
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Umbilical arteries
A. carry blood with low oxygen and high metabolic wastes from the placenta to the mother's circulation. B. deliver oxygen and nutrient-rich blood from the fetus to the placenta. C. carry highly oxygenated blood from the placenta to the fetus. D. carry blood with low oxygen and high metabolic wastes away from the fetus to the placenta. E. deliver oxygen and nutrient-rich blood from the mother to the placenta.
How does aging affect the endocrine system?
A. Secretory activity of endocrine glands decreases. B. Normal levels of hormones, particularly growth hormone and sex hormones, often decrease. C. Aging reduces the efficiency of endocrine system functions. D. Endocrine system imbalances can lead to weight gain or muscle loss. E. All of the choices are correct.
Which of the following allows the nucleus to produce ribosomes?
A) nuclear envelope B) nucleoplasm C) nuclear pore D) nucleolus E) nucleosome
Which of the following is not a bacterial STD?
A. Hepatitis C B. Gonorrhea C. Syphilis D. Chlamydia E. Trichomonas