Invertebrates have organs called __________ that detect the orientation of their bodies with respect to gravity
Fill in the blank with the correct word.
Answer: Statocysts
You might also like to view...
Which of these is most responsible for "light adaptation"-the process by which we only gradually become able to see objects in a brightly lit place after being in the dark?
A. Cone receptors are very hyperpolarized in the dark, and they must be exposed to bright light for awhile before they will depolarize. B. Rhodopsin is quickly inactivated in the presence of bright light so rods become unresponsive, and the higher-acuity cones then become the main detectors of vision. C. Cones and rods are stimulated equally, leading to difficulties in interpreting the sensory inputs to the brain. D. Because rods are more sensitive to light than cones, they gradually become extremely activated in bright light. E. Rhodopsin is not activated by colored light, and the lack of stimulation causes rods to gradually depolarize when we are exposed to bright light.
When a health care provider taps the knee to determine the presence of a knee-jerk reflex, what is happening??
A) ?A message is sent to the brain to respond. B) ?A message is sent to the spinal cord to respond. C) ?The nerve being tapped responds locally and no message is transmitted.
The ________ is not an organ of the urinary system.
A. kidney B. ureter C. urinary bladder D. liver E. urethra
The thymus is at its maximum size
A. at birth. B. at puberty. C. in old age. D. between 30 and 50 years of age.