Why is the elbow joint considered to be extremely stable?
A) Its relatively loose joint capsule permits an extensive range of motion.
B) It has especially large and numerous bursae.
C) Powerful muscles originating on the trunk, shoulder girdle, and humerus cover the joint capsule.
D) The bony surfaces of the humerus and ulna interlock.
E) A rotator cuff is associated with the joint.
D) The bony surfaces of the humerus and ulna interlock.
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The junction between an axon and the muscle fiber itself is called a ________ junction.
Fill in the blank(s) with the appropriate word(s).
The hormones LH and FSH are produced by the:
a. ovary b. corpus luteum c. anterior pituitary gland d. adrenal glands
Lymph in the cisterna chyli differs in composition from lymph in the general lymphatic stream in that it contains more ________
A) fat B) ions C) protein D) nucleic acids
Why is human chorionic gonadotropin (hCG) important early in pregnancy?
A) guides the embryo to the appropriate site for implantation B) promotes cleavage of the zygote C) prevent other sperm from fertilization the oocyte D) prods the corpus luteum to continue producing hormones E) promotes menstruation