As a general rule, in temperate regions the most important environmental cue that triggers migration is
A) Photoperiod.
B) Temperature change.
C) Change in food quality and abundance.
D) All of the above
Answer: A
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Sperm move to the uterine tube through uterine contractions and the energy of their own flagella. What other factor is involved in sperm movement?
A) reverse peristalsis of the uterus and uterine tubes B) the cilia on the apex of the cells lining the endometrium C) hormonal attraction to the ova D) the increased temperature in the vagina, which stimulates sperm motility
The bone can supply calcium to the plasma by what process?
A) filtration B) reabsorption C) resorption D) ossification E) calcification
A herniated disc is an injury of the pads of cartilage between the vertebrae in which the cartilage bulges from normal position. What type of cartilage is affected?
A) fibrocartilage B) dense regular C) dense irregular D) hyaline E) elastic
Placing pressure on a cut will constrict blood vessels manually, and encourages ________
A) platelet plug formation B) agglutination C) the conversion of fibrinogen to fibrin D) coagulation E) vascular spasms