Which of the following is found in the central nervous system?
A) satellite cell
B) nerve
C) nerve tract
D) Schwann cell
Ans: C) nerve tract
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Early in the development of skin, ectoderm becomes
A. periderm and mesoderm becomes mesenchyme. B. perichondrium and mesoderm becomes the vernix caseosa. C. mesenchyme and endoderm becomes periderm. D. the vernix caseosa and mesoderm becomes the stratum basale.
The spinal cord passes through the body of each vertebra
Indicate whether the statement is true or false
Which part of the retina has a higher concentration of cones than rods?
A. Macula lutea B. Optic disc C. Fovea centralis D. None of these answers are correct.
Which statement about excitation-contraction coupling is incorrect?
A) Calcium ion is released from the transverse tubule. B) Calcium ion is released from the sarcoplasmic reticulum. C) Tropomyosin moves to expose myosin binding sites on actin. D) Troponin binds calcium ion and signals tropomyosin to move. E) Relaxation requires uptake of calcium ions by the sarcoplasmic reticulum.