The electron microscope has revealed that one of the components within the cell consists of pinwheel array of 9 triplets of microtubules arranged to form a hollow tube. This structure is a ________
A) centrosome
B) ribosome
C) centriole
D) chromosome
C
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Which is not true about the thyroid gland?
A. It requires iodine to synthesize thyroid hormone. B. It is located on the anterior surface of the trachea, inferior to the thyroid cartilage. C. It has two lobes connected by a central portion called the commissure. D. It secretes thyroid hormone in response to stimulation by TSH. E. An enlargement of the thyroid gland is called a goiter.
The site of infection is the location at which lymphocytes
A. are formed. B. provide an effector response. C. are activated. D. become able to recognize one specific foreign antigen.
The lobe of the brain that deals with vision is the:
a. frontal lobe b. parietal lobe c. occipital lobe d. temporal lobe
In general, a small, thin person has a higher metabolic rate than a large, heavy person.
Answer the following statement true (T) or false (F)