Question

page 481 24.7. identify the sensory systems in humans. complete the following passage about sensory reception. sharks are renowned for their ability to detect blood—as little as one drop per million of seawater. this remarkable allows them to be very effective hunters. sharks are also known to zero in on prey through detecting the trashing movements of prey in the water. many sharks are crepuscular, hunting at dusk and dawn, taking advantage of the limits to caused by the low light conditions at these times of day. sharks also take advantage of to detect weak fields generated by the muscle contractions of their prey. electroreception chemoreception mechanoreception photoreception magnetoreception

Explanation:

• Detecting blood (chemicals) uses chemoreception.
• Trashing movements (mechanical stimuli) use mechanoreception.
• Low light limits vision, which relies on photoreception.
• Muscle contractions generate electric fields, detected via electroreception.

Answer:

1. chemoreception
2. mechanoreception
3. photoreception
4. electroreception