Which of the following are true regarding nails? Select all that apply.
_____ They are derived from the stratum corneum.
_____ The growth zone is called the nail plate.
_____ Nails are hard due to keratin.
_____ The eponychium is also called the cuticle.
__X__ They are derived from the stratum corneum.
__X__ Nails are hard due to keratin.
__X__ The eponychium is also called the cuticle.
The growth zone is called the nail matrix.
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This figure shows a frontal section of the kidney. Which number indicates the renal pelvis?
A. 1 B. 2 C. 4 D. 8 E. 9
Winking or blinking the eye is controlled by the
A) corrugator supercilii. B) depressor anguli oris. C) orbicularis oculi. D) occipitofrontalis. E) orbicularis oris.
By what endocytosis process do some white blood cells engulf bacteria?
A) facilitated diffusion B) phagocytosis C) exocytosis D) pinocytosis E) filtration
Describe the process of spermiation
A) During spermiation, a primary spermatocyte becomes a secondary spermatocyte. B) During spermiation, a secondary spermatocyte becomes a spermatid. C) During spermiation, a spermatid becomes a sperm. D) During spermiation, a sperm loses its tail. E) During spermiation, a sperm loses its attachment to the nurse cell and enters the lumen of the seminiferous tubule.