Chapter 6- Detecting And Regulating Change

Question 1

Types of receptors (5)

Answer 1

• thermoreceptors
• osmoreceptors
• chemoreceptors
• touch receptors
• pain receptors

Question 2

What are the properties of reflexes (4)

Answer 2

• stimulus required to trigger reflex
• reflex in involuntary
• reflex response is rapid
• reflex response is stereotyped

Question 3

What are the components of a reflex arc? (5)

Answer 3

1. The receptor reacts to a change in the internal or external environment by initiating a nerve impulse in the sensory neuron
2. A sensory neuron carries impulses from the receptor to the CNS
3. At least 1 synapse
4. A motor neuron carries the impulse to an effector
5. An effector receives the nerve impulse and carries out appropriate response

Question 4

Label spinal reflex diagram

Answer 4

P74

Question 5

Define homeostasis and give 2 examples of what the body regulates

Answer 5

The maintenance of a relatively constant internal environment despite fluctuations in the external environment.

• body temp
• Conc of glucose in blood