What type of process conducts nerve impulses toward the cell body?
A. pseudostratified columnar epithelium
B. membrane
C. neuroglia
D. mesoderm
E. dendrite
E
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What is the location of the internal pacemaker that sets biological rhythms?
A. The adrenal glands B. Suprachiasmatic nucleus of the brain C. Photoreceptors of the eye D. Ventricles of the heart E. Endocrine gland in the gonads
How many primary oocytes does a female have by the onset of puberty?
A. 2 million B. 1,000 C. 400,000 D. 1 million E. 500,000
What event causes a troponin-tropomyosin complex to regain its original shape in muscle relaxation?
a. stimulation of ACh receptors b. diffusion of Na+ back into transverse tubules c. return of Ca2+ into the sarcoplasmic reticulum d. breaking the bond with tropomyosin
In skeletal muscle, which protein is PRESENT in the I-band but ABSENT from the H-band?
a. Actin b. Creatine kinase c. Desmin d. Myosin e. Titin