The ear and the nasopharynx are connected by the auditory tube, which connects the throat and (the)
A) inner ear.
B) external ear.
C) middle ear.
D) cochlea.
E) None of the answers are correct.
C) middle ear.
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Hormones often cause a cell to elicit multiple responses; this is because ________.
A) there are thousands of receptors on the cell membrane B) the receptors bind to several hormones at the same time C) the protein kinases are rapidly metabolized D) during protein kinase activation, enzymes phosphorylate many other enzymes
__________, a protein found in a special type of retinal ganglion cell, is the receptor molecule for light that keeps the body in tune with external time
Fill in the blank(s) with correct word
Genotype is ________
A) an individual's actual genetic makeup B) the manner in which a particular trait is expressed C) the expression of sex chromosomes in an individual D) the diploid number of chromosomes in an individual
Atrial natriuretic peptide (ANP) and brain natriuretic peptide (BNP) produce __________
Fill in the blank(s) with correct word