A biology student accidentally loses the labels of two prepared slides she is studying. One is a slide of an intestine, the other of an esophagus. You volunteer to help her sort them out. How would you decide which slide is which?
Because animal intestine is modified for absorption, you would look for a slide that shows a single layer of epithelium lining the cavity. The cells would be cuboidal or columnar and would probably have microvilli on the surface to increase surface area. Because the esophagus receives undigested food, it would have a stratified epithelium consisting of squamous cells to protect it.
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If a group of agonists and antagonists contract at the same time, producing the same force at a joint, what movement will occur?
A. The movement of the antagonist B. Isotonic movement C. No movement will occur. Both muscle groups will contract isometrically. D. The movement of the agonist
The major source of estradiol and progesterone in a non-pregnant woman is the
A. testis. B. uterus. C. ovary. D. adrenal gland. E. thyroid gland.
The ________ is a depression in the lung that allows attachment of the primary bronchi, pulmonary vessels, and other structures
A) base B) apex C) hilum D) root E) cardiac notch
Vasomotor tone is controlled by using the sympathetic division for vasodilation and the parasympathetic division for vasoconstriction.
Answer the following statement true (T) or false (F)