BIO 253
BIO 253 Physiology Test 4 Study
Questions with Detailed Answers 2025
What is the correct order for the events that occur during a reflex?
C. Information is processed by interneurons
A Impulse travels through sensory neuron to the CNS
E. Effector responds
B. A stimulus activates a receptor
D. Motor neuron transmits impulse to effector -Correct Answer ✔B,A,C,D,E
When a nerve impulse reaches the end bulbs of a neuron -Correct Answer
✔calcium is released from the neuron along with neurotransmitters from synaptic
vesicles.
This portion of the brain secretes the hormone melatonin, which helps to regulate
the body's circadian rhythm. -Correct Answer ✔pineal gland
When voltage-gated K+ channels open on the axon of a neuron -Correct Answer
✔Potassium exits, depolarizing the cell to an even more negative value.
A nerve impulse travels fastest along _____ axons in _____ conduction -Correct
Answer ✔myelinated; salutatory
BIO 253
BIO 253 Physiology Test 4 Study
Questions with Detailed Answers 2025
What is the correct order for the events that occur during a reflex?
C. Information is processed by interneurons
A Impulse travels through sensory neuron to the CNS
E. Effector responds
B. A stimulus activates a receptor
D. Motor neuron transmits impulse to effector -Correct Answer ✔B,A,C,D,E
When a nerve impulse reaches the end bulbs of a neuron -Correct Answer
✔calcium is released from the neuron along with neurotransmitters from synaptic
vesicles.
This portion of the brain secretes the hormone melatonin, which helps to regulate
the body's circadian rhythm. -Correct Answer ✔pineal gland
When voltage-gated K+ channels open on the axon of a neuron -Correct Answer
✔Potassium exits, depolarizing the cell to an even more negative value.
A nerve impulse travels fastest along _____ axons in _____ conduction -Correct
Answer ✔myelinated; salutatory
BIO 253
