Nerve Impulse Physiology & Reflex Arcs Review Worksheet showing a reflex arc diagram with labeled components.

Problem Analysis:

The worksheet provided focuses on nerve impulse physiology and reflex arcs. It includes several questions related to the sequence of a reflex arc, identifying types of reflexes, and matching terms with structures in a diagram. Let's solve each part step by step.

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Part 1: Reflex Arc Sequence

#### Question 22:
Which of the following is the correct sequence in a typical reflex arc?

- Options:
a) effector, sensory neuron, integration center, motor neuron, receptor
b) receptor, sensory neuron, integration center, motor neuron, effector
c) effector, sensory neuron, integration center, sensory neuron, receptor
d) receptor, motor neuron, integration center, sensory neuron, effector
e) receptor, sensory neuron, motor neuron, integration center, effector

#### Solution:
The correct sequence of a reflex arc is:
1. Receptor: Detects the stimulus.
2. Sensory Neuron: Transmits the signal from the receptor to the central nervous system (CNS).
3. Integration Center: Processes the information in the CNS.
4. Motor Neuron: Transmits the signal from the CNS to the effector.
5. Effector: Responds to the stimulus.

Thus, the correct answer is:
b) receptor, sensory neuron, integration center, motor neuron, effector

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Part 2: Identifying Types of Reflexes

#### Questions 22–27:
Identify whether each scenario corresponds to an Autonomic Reflex (A) or a Somatic Reflex (B).

#### Definitions:
- Somatic Reflexes: Involve voluntary control and are mediated by the somatic nervous system. They typically involve skeletal muscles and are conscious.
- Autonomic Reflexes: Involve involuntary control and are mediated by the autonomic nervous system. They regulate internal body functions like heart rate, digestion, etc., and are unconscious.

#### Solutions:
1. Question 22: Rick quickly pulled his hand away from the hot stove.
- This is a Somatic Reflex (B) because it involves a rapid, voluntary withdrawal from a painful stimulus.

2. Question 23: The doctor hits your patellar tendon with a reflex hammer and your leg jerks upward.
- This is a Somatic Reflex (B) because it is a classic example of a knee-jerk reflex, which is a rapid, involuntary response controlled by the somatic nervous system.

3. Question 24: Your eyes constrict or dilate when light gets brighter or dimmer.
- This is an Autonomic Reflex (A) because it involves the automatic adjustment of pupil size, controlled by the autonomic nervous system.

4. Question 25: Regulation of blood pressure.
- This is an Autonomic Reflex (A) because it involves the autonomic nervous system, which regulates blood pressure through involuntary mechanisms.

5. Question 26: Adrenal glands secrete adrenaline when stressed.
- This is an Autonomic Reflex (A) because it involves the autonomic nervous system, which controls the release of hormones like adrenaline during stress.

6. Question 27: You salivate when you see pizza.
- This is a Somatic Reflex (B) because it involves a conscious response to a visual stimulus (seeing pizza), leading to the secretion of saliva.

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Part 3: Matching Terms with Structures

#### Questions 29–33:
Match each term below with the correct structure in the image to the right.

#### Image Labels:
- a: Hot stove (stimulus)
- b: Sensory receptor
- c: Sensory neuron
- d: Integration center (spinal cord)
- e: Motor neuron

#### Solutions:
1. Question 29: Interneuron
- The interneuron is located within the integration center (spinal cord). In the diagram, this corresponds to d.

2. Question 30: Sensory Neuron
- The sensory neuron transmits signals from the sensory receptor to the spinal cord. In the diagram, this corresponds to c.

3. Question 31: Effector Organ
- The effector organ is the muscle that responds to the signal. In the diagram, this is not explicitly labeled but is implied as the muscle contracting in response to the motor neuron signal.

4. Question 32: Sensory Receptor
- The sensory receptor detects the stimulus (hot stove). In the diagram, this corresponds to b.

5. Question 33: Motor Neuron
- The motor neuron transmits signals from the spinal cord to the effector organ. In the diagram, this corresponds to e.

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Final Answers:

1. Question 22 (Reflex Arc Sequence):
b) receptor, sensory neuron, integration center, motor neuron, effector

2. Questions 22–27 (Types of Reflexes):
- 22: B (Somatic Reflex)
- 23: B (Somatic Reflex)
- 24: A (Autonomic Reflex)
- 25: A (Autonomic Reflex)
- 26: A (Autonomic Reflex)
- 27: B (Somatic Reflex)

3. Questions 29–33 (Matching Terms with Structures):
- 29: d (Interneuron)
- 30: c (Sensory Neuron)
- 31: Not explicitly labeled in the diagram (Effector Organ)
- 32: b (Sensory Receptor)
- 33: e (Motor Neuron)

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Boxed Final Answer:

\[
\boxed{
\text{22. b) receptor, sensory neuron, integration center, motor neuron, effector}
}
\]
\[
\boxed{
\text{22. B, 23. B, 24. A, 25. A, 26. A, 27. B}
}
\]
\[
\boxed{
\text{29. d, 30. c, 31. Not labeled, 32. b, 33. e}
}
\]