Which of the following hormones is regulated by a positive feedback mechanism?

A) oxytocin
B) slow-acting hormone that works through a second-messenger system
C) TSH
D) thyroxine
E) TRH


Ans: A) oxytocin

Anatomy & Physiology

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Which of the following is associated with the sense of touch?

A. Dendritic cells B. Keratinocytes C. Melanocytes D. Fibroblasts E. Tactile cells

Anatomy & Physiology

The fastest rate of mitosis happens in the __________.

A. stratum basale B. stratum spinosum C. stratum granulosum D. stratum lucidum E. stratum corneum

Anatomy & Physiology

Which of the following statements about brain size is true?

a. Elephants have a larger number of neurons in their brain than humans do. b. Octopods have a larger number of neurons in their brains than humans do. c. The neurons in human brains are larger than the neurons in other primates' brains. d. The brains of leaf-eating primates are larger than the brains of fruit-eating primates. e. The ratio of brain size to body size is larger in baleen whales than in dolphins.

Anatomy & Physiology

When homologous replicated chromosomes pair up during meiosis, they form a

A. sister chromatid. B. centromere. C. single-stranded chromosome. D. tetrad.

Anatomy & Physiology