What is the inner most layer of an artery made of?
a. connective tissue
b. smooth muscle
c. endothelium
d. elastin fibers
e. collagen fibers
c
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A polar body is formed during
A. ovulation. B. meiosis I. C. meiosis I and meiosis II. D. mitosis. E. meiosis II.
Which of the following is classified as loose connective tissue?
a) Blood b) Spongy bone c) Areolar connective tissue d) Elastic connective tissue e) Hyaline cartilage
Once an SA nodal cell reaches threshold, the depolarization phase occurs during which
A. potassium comes in through fast voltage-gated channels. B. calcium comes in through fast voltage-gated channels. C. potassium moves out through fast voltage-gated channels. D. sodium moves out through slow voltage-gated channels. E. calcium moves out through slow voltage-gated channels.
One type of skin cancer, which often results in a potentially fatal metastasis, arises in the pigment-producing cells called ________.
Fill in the blank(s) with the appropriate word(s).