Q: Which hormone increases blood glucose levels by promoting glycogen breakdown in the liver, and what is the equation for this process?

Glucagon; $$\text{Glycogen} \rightarrow \text{Glucose}$$

Question 1

Which of the following best describes the primary difference between the nervous and endocrine systems in terms of information transmission?

Accepted Answer

The nervous system transmits information rapidly via electrical impulses along neurons, whereas the endocrine system transmits information slowly via hormones in the blood.

Question 2

During the knee jerk reflex, which of the following best explains why the latent period is shorter than during a conscious response?

Accepted Answer

The reflex arc bypasses the brain, allowing for a direct and rapid response.

Question 3

Which structure is responsible for maintaining the blood-brain barrier, and what is its clinical significance?

Accepted Answer

Astrocytes; they prevent pathogens and toxins from entering the brain, reducing risk of encephalitis.

Question 4

A patient presents with paralysis and loss of sensation in the right leg. Which part of the nervous system is most likely affected?

Accepted Answer

Left cerebral cortex

Question 5

Which equation best represents the relationship between membrane potential ($$V_m$$), ion concentration gradients, and permeability in neurons?

Accepted Answer

The Goldman-Hodgkin-Katz equation: $$V_m = \frac{RT}{F} \ln \left( \frac{P_{K^+}[K^+]_{out} + P_{Na^+}[Na^+]_{out} + P_{Cl^-}[Cl^-]_{in}}{P_{K^+}[K^+]_{in} + P_{Na^+}[Na^+]_{in} + P_{Cl^-}[Cl^-]_{out}} \right)$$

Question 6

Which of the following best describes the function of the meninges and their associated spaces?

Accepted Answer

They protect the brain and spinal cord, provide a pathway for cerebrospinal fluid, and separate neural tissue from bone.

Question 7

A patient is diagnosed with bacterial meningitis. Which procedure is most likely performed to confirm the diagnosis, and what anatomical space is accessed?

Accepted Answer

Lumbar puncture; accessing the subarachnoid space

Question 8

Which cranial nerve is responsible for vision, and what is its number?

Accepted Answer

Optic nerve; II

Question 9

Which of the following best explains the difference between conduction deafness and nerve deafness?

Accepted Answer

Conduction deafness results from damage to the middle or outer ear structures, while nerve deafness results from damage to the inner ear or auditory nerve.

Question 10

Which hormone increases blood glucose levels by promoting glycogen breakdown in the liver, and what is the equation for this process?

Accepted Answer

Glucagon; $$	ext{Glycogen} ightarrow 	ext{Glucose}$$

Question 11

A patient with hyperthyroidism is likely to experience which of the following symptoms?

Accepted Answer

Increased metabolic rate, weight loss, and heat intolerance

Question 12

Which of the following best describes the sliding filament theory of muscle contraction?

Accepted Answer

Actin and myosin filaments slide past each other, shortening the sarcomere and generating force.

Question 13

Which equation best represents the role of ATP in skeletal muscle contraction?

Accepted Answer

$$	ext{ATP} + 	ext{Myosin} ightarrow 	ext{Myosin-ADP} + 	ext{Pi}$$

Question 14

Which of the following best explains the difference between origin and insertion in muscle anatomy?

Accepted Answer

Origin is the fixed attachment point, while insertion is the movable attachment point.

Question 15

A muscle that opposes the action of another muscle is called:

Accepted Answer

Antagonist

Question 16

Which of the following best describes the physiological process occurring at the neuromuscular junction?

Accepted Answer

Acetylcholine is released from the motor neuron, binds to receptors on the muscle fiber, and triggers an action potential.

Question 17

Which of the following best explains the difference between twitch, summation, and complete tetanus in muscle contraction?

Accepted Answer

Twitch is a single contraction, summation is increased force from repeated stimuli, and complete tetanus is sustained contraction with no relaxation.

Question 18

Which of the following best describes the pathway for pain sensation and the phenomenon of referred pain?

Accepted Answer

Pain signals travel via sensory neurons to the spinal cord and brain; referred pain occurs when signals from different organs converge on the same spinal segment.

Question 19

Which of the following best explains the difference between Type I and Type II diabetes mellitus?

Accepted Answer

Type I is caused by autoimmune destruction of insulin-producing cells, while Type II is caused by insulin resistance in target cells.

Anatomy & Physiology II: Nervous, Sensory, Endocrine, and Muscular Systems Study Guide

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