Intro to Animal Responses and Sensing Environment

1. Why do organisms need to respond to their environment?

• To move away from favourable environments

• To ensure all species compete for the same resources

• To avoid predators, find resources, and reproduce

• To prevent changes in their surroundings

Which of the following is an example of intraspecific competition?

• A lion hunting a zebra

• Two wolves fighting over territory

• A bird eating seeds from a tree
  

• A rabbit avoiding a fox

What type of receptor is responsible for detecting changes in temperature?

• Mechanoreceptors

• Photoreceptors

• Thermoreceptors

• Chemoreceptors

Which sense organ is responsible for detecting chemical stimuli such as taste and smell?

• Skin

• Nose and tongue

• Eyes

• Inner ear

What is the correct sequence in a reflex arc?

• Sensory neuron → Effector → Motor neuron → Receptor → CNS

• Motor neuron → Sensory neuron → CNS → Effector

• Receptor → Sensory neuron → CNS → Motor neuron → Effector

• Effector → CNS → Sensory neuron → Motor neuron → Receptor

If you step on a sharp object, which receptor detects the stimulus?

• Thermoreceptor

• Chemoreceptor

• Mechanoreceptor

• Photoreceptor

What is the effector response when bright light enters the eyes?

• The pupil shrinks to reduce the amount of light entering

• The retina sends a signal to the skin to produce sweat

• The nose detects an increase in oxygen levels

• The brain releases adrenaline to prepare for action

What type of receptor helps some animals, such as birds and turtles, navigate using Earth's magnetic field?

• Chemoreceptors

• Magnetoreceptors

• Photoreceptors

• Mechanoreceptors

Which of the following is an example of a motor response from an effector?

• Your brain interpreting a smell

• Your eyes detecting bright light

• Your hand pulling away from a hot surface

• Your ears hearing a loud sound

What is the purpose of a reflex action?

• To improve long-term memory

• To prevent injury by responding quickly to stimuli

• To allow more time for decision-making

• To make the body aware of environmental changes over time