Answer the following statements true (T) or false (F)
1. A person whose ancestors were cattle herders is more likely to express the lactase gene as an adult.
2. All sugars are absorbed via secondary active transport.
3. In omnivores, including humans, the cecum is an important organ for digestion of cellulose.
4. Fat absorbed by the small intestine enters the lymphatic system.
1. TRUE
2. FALSE
3. FALSE
4. TRUE
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The hormone oxytocin is produced by the hypothalamus and stored by the posterior pituitary gland. There it is released to the target cells in the
A. kidneys and mammary glands. B. thyroid and adrenal cortex. C. pancreas and uterus. D. kidneys and ovaries. E. mammary glands and uterus.
Gene expression requires the participation of the following three types of RNA: __________,
__________and __________. Fill in the blank(s) with the appropriate word(s).
Movement of a molecule against a concentration
gradient is a. simple diffusion. b. facilitated diffusion. c. osmosis. d. active transport. e. bulk flow.
Please match the type of T cells with the statements that most accurately describe them to test your understanding of the relationships between the types of T cells and their receptors.
CD4 A) All T cells B) Helper T cells C) Cytotoxic T cells