Feeling Nervous

15 Points Per Correct Answer - No time limit  

1. Which statement is NOT true of simple reflexes? They can occur automatically. They can never be consciously controlled. They are relatively quick responses. They are innate.

2. The well-known "knee-jerk" reflex may be referred to as a monosynaptic reflex. What does this mean? Only one nerve cell is involved in the basic reflex arc. The basic reflex arc does not include any relay neurones. The stimulus always produces the same response. The main neural pathway passes through the spinal cord.

3. In the "knee-jerk" reflex, what is the stimulus that causes the leg to kick? reduced tension in the patellar tendon touch to the skin stretching of the thigh muscle pain

4. In a reflex arc, what is meant by the effector? the organ that carries out the response the nerve cell that ends on a muscle the stimulus the central nervous system

5. In a spinal reflex, where are the cell bodies of the sensory neurones? in the ventral root of the spinal cord in the dorsal root of the spinal cord in the white matter of the spinal cord in the grey matter of the spinal cord

6. What is one way in which the grey matter of the spinal cord differs from the white matter? It contains more cell bodies and synapses. It is around the edges of the spinal cord. It contains more nerve axons. It contains fewer nerve cells.

7. Which statement is true of all cranial reflexes? They are conscious actions. They are learned. They are under voluntary control. Their neural pathway passes through the brain.

8. In a reflex arc, how does the "message" cross a synapse? as an electrical spark as a chemical transmitter as a flow of ionic charge as a flow of electrons

9. In the 1890s, Ivan Pavlov investigated the way in which simple reflexes may be modified so that they occur in response to a new stimulus. Which reflex did Pavlov mainly investigate? knee-jerk response to pain pupil dilation salivation

10. Most reflexes depend only on the nervous system, but occasionally the endocrine system is also involved. Which of these reflexes includes the action of a hormone? shivering in response to cold secretion of saliva in reponse to food in the mouth milk ejection in response to suckling pupil contraction in response to high light intensity