RRNA is short for ____________RNA.
Fill in the blank(s) with the appropriate word(s).
ribosomal
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Why are urination and defecation under voluntary control?
A. The nerves that supply external urethral and anal sphincters have varicosities. B. The external urethral and anal sphincters are innervated by the autonomic nervous system. C. The urogenital diaphragm is voluntary while the pelvic diaphragm is involuntary. D. The external and anal sphincters are composed of multi-unit muscle tissue. E. The external and anal sphincters are composed of skeletal muscle tissue.
A chemical precursor for cortisol is ________, which is made from ________. Cortisol is secreted by ________ when stimulated by ________ from the anterior pituitary.
A. estradiol; cholesterol; adrenal medulla; corticotropin-releasing hormone (CRH) B. progesterone; cholesterol; adrenal cortex; adrenocorticotropic hormone (ACTH) C. testosterone; cholesterol; adrenal medulla; adrenocorticotropic hormone (ACTH) D. androstenedione; progesterone; adrenal cortex; corticotropin-releasing hormone (CRH) E. progesterone; cholesterol; adrenal medulla; adrenocorticotropic hormone (ACTH)
How many chromosomes will you find in a successfully fertilized egg?
A. 21 pairs B. 46 pairs C. 23 pairs D. 16 pairs
Oxygen molecules are used in the Krebs cycle and at the end of the ETS
Indicate whether the statement is true or false