The semispinalis capitis:
A) is part of the erector spinae group of muscles.
B) when acting unilaterally, rotates the head so that the face points to the ipsilateral side.
C) when acting bilaterally, flexes the neck.
D) is innervated by cervical and upper thoracic posterior rami.
E) is superficial to the splenius capitis.
Ans: D
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For many reflexes, including the stretch reflex, the excitation of a muscle leads to
A. excitation of all motorneurons that are contralateral. B. inhibition of motor neurons of its antagonist. C. inhibition of motor neurons of its synergist. D. excitation of motor neurons of the antagonist. E. inhibition of sensory neurons that initiate the reflex.
Which of the following statements is incorrect?
A) The contractions of skeletal muscles pull on tendons and move bones of the skeleton. B) Skeletal muscles are responsible for controlling the openings of the digestive and urinary tracts. C) Skeletal muscles are responsible for the pumping action of the heart. D) Skeletal muscles support the weight of some internal organs. E) Skeletal muscle contractions help maintain body temperature
Peptides such as angiotensin are reabsorbed by means of phagocytosis by tubule wall cells. The peptide is then transported back to the blood as a functional molecule.
Answer the following statement true (T) or false (F)
Most of the seminal fluid is produced
A. by the testes. B. by the seminal vesicles. C. by the prostate gland. D. by the bulbourethral glands. E. by the ejaculatory duct.