The ____________________hormones are derived from tyrosine
Fill in the blank(s) with correct word
catecholamines
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Which body feature do ultramarathon runners count on to give their muscles fuel for endurance?
A) Stronger long bones B) Healthy cartilage C) Toned ligaments and tendons D) Richer blood supply
Match the structure of the eye with the appropriate description.A. Photoreceptor cells that function in black and white visionB. Photoreceptor cells that function in color visionC. The opening in the irisD. The innermost tunic of the eyeE. A pigmented contractile structureRetina
Fill in the blank(s) with the appropriate word(s).
What structure compresses the urethra so that urine remains in the bladder?
A. Detrusor muscle B. Trigone C. Internal urethral sphincter D. None of these are correct.
A researcher discovered a sensory receptor that detects decreasing oxygen concentrations in the blood. According to the principles of negative feedback, it is likely that stimulation of this sensory receptor will produce which of the following types of responses?
A. An increase in physical activity B. An increase in the respiratory rate C. A decrease in heart rate D. Unconsciousness E. Both a decrease in heart rate and an increase in the respiratory rate will occur.