Which statement is correct?
A) Using expensive hair products can enhance the mitotic growth of hair cells within the shaft.
B) A hair shaft is made of varying densities and consistencies of keratin.
C) All hairs have the same growth cycle until mid-life.
D) Carotene is the major pigment that colors hair shafts.
E) Any hair loss signifies a medical condition, which should be checked by a doctor.
B) A hair shaft is made of varying densities and consistencies of keratin.
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This figure shows the muscles of the posterior trunk. What muscle does number 3 indicate?
A. Trapezius B. Rhomboid major C. Latissimus dorsi D. Infraspinatus E. Supraspinatus
How long does it take for an epithelial cell to migrate from the base of the villi to the tip?
a. 3 hours. b. 3 days. c. 1 day. d. 3 month. e. several weeks.
Renal plasma clearance
A. is the same as GFR for substances that are both filtered and secreted. B. is lower than GFR for substances that are both filtered and secreted. C. is the volume of plasma that can be entirely cleared of a substance in one minute. D. is the amount of water loss from the plasma to the urine over the course of one hour.
The major function of this body system is to keep us healthy by protecting us from foreign substances and pathogens
A) respiratory B) urinary C) lymphatic/immunity D) cardiovascular