Exam 46: Animal Sensory Systems and Movement

A patient is hospitalized with muscle spasms caused by failure of back muscles to relax after contraction.Which of the following would be most likely to help?

Acidic amino acids will taste sour.

Which of the sequence of events below best describes how hair cells (sterocilia)in the rabbit ear provide the brain with information about stimulus intensity?

Hair cells in the vertebrate ear are responsible for transducing sound pressure waves.Ion channels in the hair cell membrane open when

Pit vipers can detect and strike in complete darkness because of their ability to detect

Two students studying physiology taste a known "bitter" substance,and both report sensing bitterness.They then sample another substance.Student A reports sensing both a bitter taste and a salty taste,but student B reports only a salty taste.What is the most logical explanation?

What would happen to people exposed to a chemical warfare agent that blocked acetylcholine from binding to muscle receptors?

Mammals have a family of 500 and 1000 genes that encode receptor proteins on the surface of odor-receptor neurons.If all mammals have these genes,why do some mammals have a better sense of smell than others do?

When an action potential from a motor neuron arrives at the neuromuscular junction (NMJ),a series of events occurs that leads to muscle contraction.Which of the following events will occur last (i.e.,after all of the others)?

A person able to hear only high-frequency sounds would probably have which of the following structural problems in the ear?

Which of the following is not a true description of the transduction of a stimulus by sensory receptors into signals in the form of action potentials?

How do citrus fruits such as lemons cause the basic taste of sour?

Bat echolocation (sonar)is most closely related to which human sensory system?

What is the function of the sarcoplasmic reticulum?

Vertebrates and cephalopods have eyes that are structurally very similar.One key difference is that cephalopods do not have a blind spot.What causes the blind spot in vertebrates?

What is the function of the cochlea?

Corneal surgery is now routinely performed to improve vision.This surgery

You have a baby that does not seem to respond to sound.Upon thorough investigation by the doctor,there is nothing visibly wrong with the baby's ears.What internal issue may there be that is causing hearing impairment in your baby?

Compared to human eyes,the eyes of cephalopods (squid and octopus)

How would the absence of the enzyme photodiesterase (PDE)affect vision in the vertebrate eye?