What is the part of the egg where the sperm enters the egg cell to allow fertilization to occur?
a. chalaza c. albumin
b. yolk d. germinal disc
D
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The depression on the posterior surface at the distal end of the humerus is the
A) olecranon fossa. B) coronoid fossa. C) radial fossa. D) intertubercular groove. E) radial groove.
What is a follicle composed of?
A. A group of follicular cells B. An oocyte enclosed in follicular or granulosa cells C. An organ in the ovary D. A group of granulosa cells E. An oocyte
Ejaculation of semen from the penis is caused by:
A. a parasympathetic reflex that contracts the seminal vesicles, epididymis, and vas deferens. B. a somatic reflex that initiates sperm production and motility, and contracts skeletal muscle surrounding the vas deferens. C. voluntary relaxation of the internal urethral sphincter, and sympathetic stimulation of smooth muscle contraction in the walls of the ureters and the urethra. D. sympathetic nerve firing, which initiates smooth muscle contraction in the epididymis, vas deferens, ejaculatory ducts, prostate, and seminal vesicles. E. parasympathetic stimulation of smooth muscle in the ureters, urinary bladder, and urethra.
Excess iron is stored in the liver and spleen as
A) transferrin. B) urobilin and stercobilin. C) bilirubin and biliverdin. D) hemoglobin. E) hemosiderin and ferritin.